Minerology

@misc{zharkova1965carnallite1,
    author = "Zharkova, T. M",
    title = "Carnallite in Cambrian salt deposits of the Siberian Platform",
    year = "1965",
    howpublished = "Academy of Sciences of the USSR Reports, v. 164, no. 1, p. 177- 178; English translation by American Geological Institute, 1966, Academy of Science, USSR Reports, v.164, p. 144-145",
    note = "talkorigins\_source = {true}; raw\_reference = {Zharkova, T. M., 1965, Carnallite in Cambrian salt deposits of the Siberian Platform: Academy of Sciences of the USSR Reports, v. 164, no. 1, p. 177- 178; English translation by American Geological Institute, 1966, Academy of Science, USSR Reports, v.164, p. 144-145.}"
}

Sections on the Burin Peninsula in southeastern Newfoundland show a record of continuous sedimentation during the Late Precambrian–Early Cambrian transition. These may be correlated lithologically and biostratigraphically with less complete sequences on the Avalon and Bonavista Peninsulas. Below the oldest known trilobites in southeastern Newfoundland (of the Callavia Zone) two consecutive assemblages of skeletal fossils are recognizable: an Aldanella attleborensis assemblage and the succeeding Coleoloides typicalis assemblage. The shift between the two assemblages takes place within the Bonavista Formation in the Avalon–Bonavista region and in a similar succession of mudstones near St. Lawrence on the Burin Peninsula. The quartzitic Random Formation appears to have been deposited during a short interval within the time span represented by the A. attleborensis assemblage, and there is no conclusive biostratigraphical evidence of any major diachronism of this unit. The A. attleborensis assemblage contains taxa known from the lower part of the Tommotian Stage on the Siberian Platform. It is interpreted to be of Tommotian age, and the subsequent shift to the C. typicalis assemblage is tentatively correlated with the Tommotian–Atdabanian boundary as recognized in Siberia.

@article{doi101139e83050,
    author = "Bengtson, Stefan and Fletcher, T. P.",
    title = "The oldest sequence of skeletal fossils in the Lower Cambrian of southeastern Newfoundland",
    year = "1983",
    journal = "Canadian Journal of Earth Sciences",
    abstract = "Sections on the Burin Peninsula in southeastern Newfoundland show a record of continuous sedimentation during the Late Precambrian–Early Cambrian transition. These may be correlated lithologically and biostratigraphically with less complete sequences on the Avalon and Bonavista Peninsulas. Below the oldest known trilobites in southeastern Newfoundland (of the Callavia Zone) two consecutive assemblages of skeletal fossils are recognizable: an Aldanella attleborensis assemblage and the succeeding Coleoloides typicalis assemblage. The shift between the two assemblages takes place within the Bonavista Formation in the Avalon–Bonavista region and in a similar succession of mudstones near St. Lawrence on the Burin Peninsula. The quartzitic Random Formation appears to have been deposited during a short interval within the time span represented by the A. attleborensis assemblage, and there is no conclusive biostratigraphical evidence of any major diachronism of this unit. The A. attleborensis assemblage contains taxa known from the lower part of the Tommotian Stage on the Siberian Platform. It is interpreted to be of Tommotian age, and the subsequent shift to the C. typicalis assemblage is tentatively correlated with the Tommotian–Atdabanian boundary as recognized in Siberia.",
    url = "https://doi.org/10.1139/e83-050",
    doi = "10.1139/e83-050",
    openalex = "W2043721655",
    references = "doi101007bf02986060, doi101017s0016756800028296, doi10108011035898109454517, doi101111j150239311970tb00829x, doi101111j150239311984tb02022x, doi101139e78010, doi101139e80038, doi102475ajs2816807, doi104095123902, openalexw2588295003"
}

@incollection{zharkov1984cambrian,
    author = "Zharkov, Michail A.",
    title = "Cambrian Salt Deposits",
    year = "1984",
    booktitle = "Paleozoic Salt Bearing Formations of the World",
    url = "https://doi.org/10.1007/978-3-642-69543-8\_3",
    doi = "10.1007/978-3-642-69543-8\_3",
    pages = "15-59"
}

@article{mandelbaum1990methodology,
    author = "Mandelbaum, M. M. and Shamal, A. I.",
    title = "Methodology of Geophysical Exploration for Oil and Gas Deposits in Cambrian and Precambrian Sediments of the Siberian Platform",
    year = "1990",
    journal = "Exploration Geophysics",
    url = "https://doi.org/10.1071/eg990197",
    doi = "10.1071/eg990197",
    number = "3",
    pages = "197-201",
    volume = "21"
}

@article{kuznetsov1992paleogeography,
    author = "Kuznetsov, V. G. and Ilyukhin, L. N. and Miller, S. A. and Moskovkina, E. Yu. and Postnikova, O. V.",
    title = "PALEOGEOGRAPHY OF VENDIAN-CAMBRIAN BOUNDARY DEPOSITS OF THE SOUTHERN SIBERIAN PLATFORM",
    year = "1992",
    journal = "International Geology Review",
    url = "https://doi.org/10.1080/00206819209465623",
    doi = "10.1080/00206819209465623",
    number = "6",
    pages = "582-597",
    volume = "34"
}

Small shelly fossils from the Wirrealpa and Aroona Creek Limestones, Flinders Ranges, and the temporally equivalent Ramsay Limestone, Yorke Peninsula, South Australia, are described and assessed. These formations, deposited during a widespread marine transgression, have traditionally been assigned an early Middle Cambrian age based on lateral facies relationships, lithostratigraphic interpretation, and age diagnostic trilobites. However, new data from regional sequence stratigraphy and mounting paleontological evidence suggest that a late Early Cambrian age (equivalent to the Toyonian Stage from the Siberian Platform) is more appropriate for these units. Twenty-four taxa, including a number of problematica, poriferans, coeloscleritophorans, palaeoscolecidans, “conodontomorphs,” hyolithelminthes, hyoliths, mollusks, and inarticulate brachiopods, are reported herein; many of these have not previously been reported from the Cambrian of South Australia. The enigmatic Chalasiocranos exquisitum n. gen. and sp., known from disarticulated tuberculate cone-shaped phosphatic sclerites, and Protomelission gatehousei n. gen. and sp., a problematic, perhaps colonial organism, known from phosphatic plates, are especially notable. The genus Kaimenella is formally included in the Palaeoscolecida, and two species (including K. dailyi n. sp.) are recognized.

@article{doi101017s0022336000037045,
    author = "Brock, Glenn A. and Cooper, Barry",
    title = "Shelly fossils from the Early Cambrian (Toyonian) Wirrealpa, Aroona Creek, and Ramsay Limestones of South Australia",
    year = "1993",
    journal = "Journal of Paleontology",
    abstract = "Small shelly fossils from the Wirrealpa and Aroona Creek Limestones, Flinders Ranges, and the temporally equivalent Ramsay Limestone, Yorke Peninsula, South Australia, are described and assessed. These formations, deposited during a widespread marine transgression, have traditionally been assigned an early Middle Cambrian age based on lateral facies relationships, lithostratigraphic interpretation, and age diagnostic trilobites. However, new data from regional sequence stratigraphy and mounting paleontological evidence suggest that a late Early Cambrian age (equivalent to the Toyonian Stage from the Siberian Platform) is more appropriate for these units. Twenty-four taxa, including a number of problematica, poriferans, coeloscleritophorans, palaeoscolecidans, “conodontomorphs,” hyolithelminthes, hyoliths, mollusks, and inarticulate brachiopods, are reported herein; many of these have not previously been reported from the Cambrian of South Australia. The enigmatic Chalasiocranos exquisitum n. gen. and sp., known from disarticulated tuberculate cone-shaped phosphatic sclerites, and Protomelission gatehousei n. gen. and sp., a problematic, perhaps colonial organism, known from phosphatic plates, are especially notable. The genus Kaimenella is formally included in the Palaeoscolecida, and two species (including K. dailyi n. sp.) are recognized.",
    url = "https://doi.org/10.1017/s0022336000037045",
    doi = "10.1017/s0022336000037045",
    openalex = "W2498268554",
    references = "doi101007bf02985708, doi101007bf03044446, doi101017cbo9781139104036004, doi10108000222935608697572, doi101080037454809494387, doi101080037454809496570, doi105962bhltitle13172, doi105962bhltitle13182"
}

@article{s253bd19ea1392e82f3ea7727a9ef6d30c76c38b1c,
    author = "Grishina, S. and Pironon, J. and Kontorovich, A. and Polosov, A. and Ariskina, O.",
    title = "Hydrocarbon inclusion in Cambrian salt deposits of Siberian platform: a clue for oil geochemistry understanding in metamorphic salts",
    year = "1997",
    url = "https://www.semanticscholar.org/paper/53bd19ea1392e82f3ea7727a9ef6d30c76c38b1c",
    is_oa = "true",
    semanticscholar_id = "53bd19ea1392e82f3ea7727a9ef6d30c76c38b1c"
}

@article{s2ec6aafffa005875b4c098530ce30dacf3dd89c12,
    author = "Sovetov, J. and Kulikova, A. and Medvedev, M. and Federation., Russian",
    title = "Late Vendian-Early Cambrian riftogenic hanging-wall sedimentary basin and Early Cambrian ocean problem: western and southern periphery of the Siberian Platform",
    year = "2005",
    url = "https://www.semanticscholar.org/paper/ec6aafffa005875b4c098530ce30dacf3dd89c12",
    is_oa = "true",
    openalex = "W2182630148",
    semanticscholar_id = "ec6aafffa005875b4c098530ce30dacf3dd89c12"
}

@article{demidenko2006new,
    author = "Demidenko, Yu. E.",
    title = "New Cambrian lobopods and chaetognaths of the Siberian Platform",
    year = "2006",
    journal = "Paleontological Journal",
    url = "https://doi.org/10.1134/s0031030106030026",
    doi = "10.1134/s0031030106030026",
    number = "3",
    openalex = "W1998006217",
    pages = "234-243",
    volume = "40",
    references = "bengtson1976the, doi101007bf02985708, doi101038351184a0, doi1011111475498300289, doi101111j109636421995tb00110x, doi10182618200067378198301, doi101826182003741571989, openalexw2473761340, openalexw2598873191, openalexw587905045"
}

Han, Jian, Liu, Jianni, Zhang, Zhifei, Zhang, Xingliang, Shu, Degan (2007): Trunk ornament on the palaeoscolecid worms Cricocosmia and Tabelliscolex from the Early Cambrian Chengjiang deposits of China. Acta Palaeontologica Polonica 52 (2): 423-431, DOI: 10.5281/zenodo.13741646

@article{doi105281zenodo13741645,
    author = "Han, Jian and Liu, Jianni and Zhang, Zhifei and Zhang, Xingliang and Shu, Degan",
    title = "Trunk ornament on the palaeoscolecid worms Cricocosmia and Tabelliscolex from the Early Cambrian Chengjiang deposits of China",
    year = "2007",
    abstract = "Han, Jian, Liu, Jianni, Zhang, Zhifei, Zhang, Xingliang, Shu, Degan (2007): Trunk ornament on the palaeoscolecid worms Cricocosmia and Tabelliscolex from the Early Cambrian Chengjiang deposits of China. Acta Palaeontologica Polonica 52 (2): 423-431, DOI: 10.5281/zenodo.13741646",
    url = "https://doi.org/10.5281/zenodo.13741645",
    doi = "10.5281/zenodo.13741645",
    openalex = "W1168767195",
    references = "doi1011111475498300289"
}

Abstract The petroleum potential of the Riphean-Vendian Chunya sedimentary basin has been explored by seismic reflection profiling and drilling in recent years. The results of the study have been used to estimate the initial hydrocarbon resources in the basin and separately in four oil and gas areas distinguished in Riphean, Lower Vendian, and Vendian-Lower Cambrian reservoirs.

@article{doi101016jrgg200802001,
    author = "Мельников, Н. В. and Filiptsov, Yu. A. and Val’chak, V. I. and Smirnov, Egor and Боровикова, Л. В.",
    title = "Petroleum potential of the Riphean-Vendian Chunya sedimentary basin in the western Siberian Platform",
    year = "2008",
    journal = "Russian Geology and Geophysics",
    abstract = "Abstract The petroleum potential of the Riphean-Vendian Chunya sedimentary basin has been explored by seismic reflection profiling and drilling in recent years. The results of the study have been used to estimate the initial hydrocarbon resources in the basin and separately in four oil and gas areas distinguished in Riphean, Lower Vendian, and Vendian-Lower Cambrian reservoirs.",
    url = "https://doi.org/10.1016/j.rgg.2008.02.001",
    doi = "10.1016/j.rgg.2008.02.001",
    openalex = "W2038602170"
}

Abstract A new type of Cambrian section penetrated by the Vostok-1 stratigraphic test well in the east of the West Siberian Plate, Tomsk Region, is described in terms of paleontology. It can be considered a key section for this region. According to a complex of geological and geophysical characteristics, the section in the depth range of 2766–5010 m was divided into the Churbiga, Paidugina, Pudzhelga, Podelga, Kondes, Shedelga, and Pyzhina Formations, and their first description was made. The Cambrian section in Vostok-1 well is most similar to those of the Kotui-Igarka area of the northwestern Siberian Platform, where Cambrian deposits formed in the pre-reef zone of an open sea basin. In the lower section of the borehole the highly carbonaceous siliceous-argillaceous-carbonate Paidugina Formation was stripped, which is an analog of the Lower-Middle Cambrian Shumnaya and Kuonamka Formations of the Siberian Platform. The Paidugina Formation, which accumulated on the shelf and slope of the open sea facing the Paleo-Asian ocean, is considered oil-producing and suggests the high petroleum potential of the cis-Yenisei basin. Also, a highly promising generation-accumulation petroleum system has been revealed.

@article{doi101016jrgg200806011,
    author = "Конторович, А. Э. and Варламов, А.И. and Emeshev, V.G. and Ефимов, А.С. and Klets, A.G. and Komarov, A. V. and Kontorovich, Vladimir and Korovnikov, I. V. and Saraev, S.V. and Filippov, Yu. F. and Вараксина, Ирина Валерьевна and Глинских, В.Н. and Luchinina, V. A. and Novozhilova, N. V. and Pegel, Tatyana V. and Sennikov, N. V. and Тимохин, А. В.",
    title = "New type of Cambrian section in eastern part of West Siberian Plate (based on Vostok-1 stratigraphic well data)",
    year = "2008",
    journal = "Russian Geology and Geophysics",
    abstract = "Abstract A new type of Cambrian section penetrated by the Vostok-1 stratigraphic test well in the east of the West Siberian Plate, Tomsk Region, is described in terms of paleontology. It can be considered a key section for this region. According to a complex of geological and geophysical characteristics, the section in the depth range of 2766–5010 m was divided into the Churbiga, Paidugina, Pudzhelga, Podelga, Kondes, Shedelga, and Pyzhina Formations, and their first description was made. The Cambrian section in Vostok-1 well is most similar to those of the Kotui-Igarka area of the northwestern Siberian Platform, where Cambrian deposits formed in the pre-reef zone of an open sea basin. In the lower section of the borehole the highly carbonaceous siliceous-argillaceous-carbonate Paidugina Formation was stripped, which is an analog of the Lower-Middle Cambrian Shumnaya and Kuonamka Formations of the Siberian Platform. The Paidugina Formation, which accumulated on the shelf and slope of the open sea facing the Paleo-Asian ocean, is considered oil-producing and suggests the high petroleum potential of the cis-Yenisei basin. Also, a highly promising generation-accumulation petroleum system has been revealed.",
    url = "https://doi.org/10.1016/j.rgg.2008.06.011",
    doi = "10.1016/j.rgg.2008.06.011",
    openalex = "W2066805234"
}

Nine sedimentary sequences are recognized in the Ordovician of the Siberian Platform. These sequences correspond to sea level fluctuations of the 3rd order, from 1 to 6 My. Correlation with the sequences recognized in the Ordovician of the Russian Platform suggest their possible eustatic nature. Cold water nontropical carbonates are suggested in the Ordovician of the Tungus Syneclise, which may be explained by the upwelling of cold oceanic waters. The upwelling was caused by re-distribution of oceanic currents due to largescale tectonic events in the mid-Ordovician. The Ordovician evolution of the Siberian Platform was much more similar to that of the North American Platform than of the Russian Platform.

@article{doi101134s0031030109110124,
    author = "Dronov, A. V. and Kanygin, A.V. and Тимохин, А. В. and Tolmacheva, T. Yu. and Gonta, T.V.",
    title = "Correlation of eustatic and biotic events in the Ordovician paleobasins of the Siberian and Russian platforms",
    year = "2009",
    journal = "Paleontological Journal",
    abstract = "Nine sedimentary sequences are recognized in the Ordovician of the Siberian Platform. These sequences correspond to sea level fluctuations of the 3rd order, from 1 to 6 My. Correlation with the sequences recognized in the Ordovician of the Russian Platform suggest their possible eustatic nature. Cold water nontropical carbonates are suggested in the Ordovician of the Tungus Syneclise, which may be explained by the upwelling of cold oceanic waters. The upwelling was caused by re-distribution of oceanic currents due to largescale tectonic events in the mid-Ordovician. The Ordovician evolution of the Siberian Platform was much more similar to that of the North American Platform than of the Russian Platform.",
    url = "https://doi.org/10.1134/s0031030109110124",
    doi = "10.1134/s0031030109110124",
    openalex = "W2107151280"
}

The monograph presents the results of the study of the Cambrian small shelly fossil fauna of the Meishucun Locality (east of Yunnan Province, China), the reference section for the Cambrian stratigraphy and paleontology of China and the stratotype of the Meishucunian Regional Stage. This publication contains a monographic description of 66 species and 52 genera of zooproblematica and mollusks and an annotated checklist of the small shelly fossil species of the Cambrian of China. The checklist includes 744 nominal species (among them 508 species names are zooproblematica, 220 species names are mollusks, and 16 names represent other groups of organisms). A taxonomic revision of all mollusk and zooproblematic taxa that have ever been described from the Cambrian of China is made at the species and generic levels. We propose that, of the 508 checklisted species of zooproblematica, 221 species should be considered valid, 80 of them are considered as tentatively valid, whereas of the 220 checklisted species of mollusks, 92 species can be considered valid. It was found out that 28 species names of zooproblematica and 7 species names of mollusks should be considered as nomina nuda, since their descriptions do not satisfy the availability criterion. We have to consider 20 species of mollusks and 18 species of zooproblematica as nomina dubia, because these taxa have been described based on unsatisfactory or fragmentary preserved material lacking any diagnostic features. Based on taxonomic work, it has been shown that the great number of synonymous taxa resulted in a more than double overestimation of the real value of the nominal species biodiversity of the Cambrian small shelly fossil fauna of China. The following new taxa are described, i.e. genera: Hexagonellus Demidenko, gen. nov.; Asiapatella Parkhaev et Zhegallo, nom. nov.; Dorispira Parkhaev, gen. nov.; and species: Platyspinites elegans Demidenko, sp. nov.; Mongolodus sulcus Demidenko, sp. nov.; Hexagonellus kuzminae Demidenko, sp. nov.; Halkieria wangi Demidenko, sp. nov.; Asiapatella sinuata Parkhaev, sp. nov.; Pseudoscenella levigata Parkhaev, sp. nov.; Trifistulella tortilis Demidenko, sp. nov. Based on the analysis of biostratigraphic and chemostratigrahic data, we propose the correlation of the Upper Precambrian-Lower Cambrian boundary deposits of the Siberian Platform and Yangtze Platform. According to this correlation, the base of the Tommotian Stage corresponds to the level within the middle of the Zhongyicun Member of the Zhujiaqing Formation. The monograph contains an extensive bibliography of 379 publications on the subject.

@article{doi101134s0031030110080010,
    author = "Parkhaev, P. Yu. and Demidenko, Yu. E.",
    title = "Zooproblematica and mollusca from the Lower Cambrian Meishucun section (Yunnan, China) and taxonomy and systematics of the Cambrian small shelly fossils of China",
    year = "2010",
    journal = "Paleontological Journal",
    abstract = "The monograph presents the results of the study of the Cambrian small shelly fossil fauna of the Meishucun Locality (east of Yunnan Province, China), the reference section for the Cambrian stratigraphy and paleontology of China and the stratotype of the Meishucunian Regional Stage. This publication contains a monographic description of 66 species and 52 genera of zooproblematica and mollusks and an annotated checklist of the small shelly fossil species of the Cambrian of China. The checklist includes 744 nominal species (among them 508 species names are zooproblematica, 220 species names are mollusks, and 16 names represent other groups of organisms). A taxonomic revision of all mollusk and zooproblematic taxa that have ever been described from the Cambrian of China is made at the species and generic levels. We propose that, of the 508 checklisted species of zooproblematica, 221 species should be considered valid, 80 of them are considered as tentatively valid, whereas of the 220 checklisted species of mollusks, 92 species can be considered valid. It was found out that 28 species names of zooproblematica and 7 species names of mollusks should be considered as nomina nuda, since their descriptions do not satisfy the availability criterion. We have to consider 20 species of mollusks and 18 species of zooproblematica as nomina dubia, because these taxa have been described based on unsatisfactory or fragmentary preserved material lacking any diagnostic features. Based on taxonomic work, it has been shown that the great number of synonymous taxa resulted in a more than double overestimation of the real value of the nominal species biodiversity of the Cambrian small shelly fossil fauna of China. The following new taxa are described, i.e. genera: Hexagonellus Demidenko, gen. nov.; Asiapatella Parkhaev et Zhegallo, nom. nov.; Dorispira Parkhaev, gen. nov.; and species: Platyspinites elegans Demidenko, sp. nov.; Mongolodus sulcus Demidenko, sp. nov.; Hexagonellus kuzminae Demidenko, sp. nov.; Halkieria wangi Demidenko, sp. nov.; Asiapatella sinuata Parkhaev, sp. nov.; Pseudoscenella levigata Parkhaev, sp. nov.; Trifistulella tortilis Demidenko, sp. nov. Based on the analysis of biostratigraphic and chemostratigrahic data, we propose the correlation of the Upper Precambrian-Lower Cambrian boundary deposits of the Siberian Platform and Yangtze Platform. According to this correlation, the base of the Tommotian Stage corresponds to the level within the middle of the Zhongyicun Member of the Zhujiaqing Formation. The monograph contains an extensive bibliography of 379 publications on the subject.",
    url = "https://doi.org/10.1134/s0031030110080010",
    doi = "10.1134/s0031030110080010",
    openalex = "W2091743438",
    references = "brasier1987microfossils, doi1010079781489924278, doi101016003101829390065q, doi101016jpalaeo200703046, doi101017s0016756800028296, doi101093mollus544367, doi101098rstb19950029, doi101098rstb19980213, doi101111j109636421997tb00137x, doi10182618200067378198301, doi101826182003741571989, doi1018814epiiugs1985v8i2003, doi1023071483846, doi1023072992562, openalexw2473761340, openalexw3127114020"
}

The former stratigraphic chart of the Cambrian in the Turukhansk–Irkutsk–Olekma region of the Siberian Platform was compiled in 1986 and approved in 1988. Large amounts of data were obtained from new wells drilled in the western and northern parts of the region during the preceding 20 years. Modifications necessitated by new data entail an indefinitely continuous series of revised facies zonation, recognition of new facies areas, regions and zone, as well as definition of a regional early Mayan stratigraphic hiatus. A new local stratigraphic division is the Olenchima Member (base of the Evenk Formation) underlain by a hiatus. The term Kochumdek Formation is no longer used in the Bakhta region and its lithologically distinct subformations (Yasenga, Moktakon, Mara, and Abakun) were raised to formation rank. The Olenchima Formation is no longer used in the Baikit zone; but instead, the Litvintsevo Formation was established here by correlation.

@article{melnikov2010stratigraphic,
    author = "Mel’nikov, N.V. and Shabanov, Yu.Ya. and Shabanova, O.S.",
    title = "Stratigraphic chart of Cambrian deposits in the Turukhansk–Irkutsk–Olekma region, Siberian Platform",
    year = "2010",
    journal = "Russian Geology and Geophysics",
    abstract = "The former stratigraphic chart of the Cambrian in the Turukhansk–Irkutsk–Olekma region of the Siberian Platform was compiled in 1986 and approved in 1988. Large amounts of data were obtained from new wells drilled in the western and northern parts of the region during the preceding 20 years. Modifications necessitated by new data entail an indefinitely continuous series of revised facies zonation, recognition of new facies areas, regions and zone, as well as definition of a regional early Mayan stratigraphic hiatus. A new local stratigraphic division is the Olenchima Member (base of the Evenk Formation) underlain by a hiatus. The term Kochumdek Formation is no longer used in the Bakhta region and its lithologically distinct subformations (Yasenga, Moktakon, Mara, and Abakun) were raised to formation rank. The Olenchima Formation is no longer used in the Baikit zone; but instead, the Litvintsevo Formation was established here by correlation.",
    url = "https://doi.org/10.1016/j.rgg.2010.05.008",
    doi = "10.1016/j.rgg.2010.05.008",
    number = "6",
    pages = "672-683",
    volume = "51"
}

Kerogens from the Lower and Middle Cambrian deposits of the Kuonamka Formation in the northeastern Siberian Platform have been analyzed by modern methods. We have determined the pyrolytic characteristics of insoluble organic matter and the contents of C, H, S, N, O, and the stable C isotope. The type and catagenesis of organic matter have been estimated, as well as the generating potential of oil source rocks. It has been found that the composition of kerogens taken from the Molodo River outcrops was affected by supergene processes and that the degree of their alteration is related to the organic content of rocks and their structure.

@article{parfenova2010kerogen,
    author = "Parfenova, T.M. and Kontorovich, A.E. and Borisova, L.S. and Melenevskii, V.N.",
    title = "Kerogen from the Cambrian deposits of the Kuonamka Formation (northeastern Siberian Platform)",
    year = "2010",
    journal = "Russian Geology and Geophysics",
    abstract = "Kerogens from the Lower and Middle Cambrian deposits of the Kuonamka Formation in the northeastern Siberian Platform have been analyzed by modern methods. We have determined the pyrolytic characteristics of insoluble organic matter and the contents of C, H, S, N, O, and the stable C isotope. The type and catagenesis of organic matter have been estimated, as well as the generating potential of oil source rocks. It has been found that the composition of kerogens taken from the Molodo River outcrops was affected by supergene processes and that the degree of their alteration is related to the organic content of rocks and their structure.",
    url = "https://doi.org/10.1016/j.rgg.2010.02.004",
    doi = "10.1016/j.rgg.2010.02.004",
    number = "3",
    pages = "277-285",
    volume = "51"
}

Abstract The paper examines trilobite assemblages found in the Botomian–Toyonian (Lower Cambrian) boundary stratotype section in the middle reaches of the Lena River, Siberian Platform. It has been found that the trilobite assemblage from the Bergeroniellus ketemensis Zone (bottom of the Toyonian) is very much the same as that from the underlying Bergeroniaspis ornata Zone (terminal Botomian zone). It has been suggested to combine these zones into one with the index species Bergeroniaspis ornata. The greatest changes in the trilobite assemblages are observed at a higher stratigraphic level, at the bottom of the Lermontovia grandis Zone (second Toyonian zone). This suggests that the lower boundary of the Toyonian should be placed at the bottom of this zone. This new boundary shows substantial changes in the trilobite abundance and diversity and is well-pronounced, not only in the stratotype sections of the Lena River, but also elsewhere in the Siberian Platform (the northeast and northwest of the region, the Anabar area, and others).

@article{doi101016jrgg201106004,
    author = "Korovnikov, I. V.",
    title = "The lower boundary of the Toyonian stage (Cambrian) of the Siberian Platform",
    year = "2011",
    journal = "Russian Geology and Geophysics",
    abstract = "Abstract The paper examines trilobite assemblages found in the Botomian–Toyonian (Lower Cambrian) boundary stratotype section in the middle reaches of the Lena River, Siberian Platform. It has been found that the trilobite assemblage from the Bergeroniellus ketemensis Zone (bottom of the Toyonian) is very much the same as that from the underlying Bergeroniaspis ornata Zone (terminal Botomian zone). It has been suggested to combine these zones into one with the index species Bergeroniaspis ornata. The greatest changes in the trilobite assemblages are observed at a higher stratigraphic level, at the bottom of the Lermontovia grandis Zone (second Toyonian zone). This suggests that the lower boundary of the Toyonian should be placed at the bottom of this zone. This new boundary shows substantial changes in the trilobite abundance and diversity and is well-pronounced, not only in the stratotype sections of the Lena River, but also elsewhere in the Siberian Platform (the northeast and northwest of the region, the Anabar area, and others).",
    url = "https://doi.org/10.1016/j.rgg.2011.06.004",
    doi = "10.1016/j.rgg.2011.06.004",
    openalex = "W1982819274",
    references = "doi101007bf02910572, doi1018814epiiugs1994v17i12002, doi1018814epiiugs2000v23i3006, doi1018814epiiugs2007v30i4004, melnikov2010stratigraphic, openalexw656474934"
}

@article{deniyanovich2015the,
    author = "Deniyanovich, N. I.",
    title = "THE SLOPE FORMATION IN THE MIDDLE-LATE-CAMBRIAN RED TERRIGENOUS DEPOSITS IN THE SOUTH OF THE SIBERIAN PLATFORM",
    year = "2015",
    journal = "Geomorphology RAS",
    url = "https://doi.org/10.15356/0435-4281-2010-3-32-39",
    doi = "10.15356/0435-4281-2010-3-32-39",
    number = "3",
    pages = "32"
}

Abstract We summarize data on the biostratigraphic units of the Siberian Ordovician deposits based on pelagic groups of fauna: graptolites, conodonts, and chitinozoans. It is shown that graptolite and conodont zones and beds have a high potential for correlation. We have determined the precise zonal position of most of the lower boundaries of the Ordovician stages and informal Ordovician substages of the International Stratigraphic Chart in the Lower Paleozoic key sections of the Taimyr Peninsula, Siberian Platform, and Altai–Sayan Folded Area.

@article{doi101016jrgg201503010,
    author = "Sennikov, N. V. and Tolmacheva, T. Yu. and Obut, O.T. and Изох, Н. Г. and Lykova, E. V.",
    title = "Zonation of the Siberian Ordovician deposits based on pelagic groups of fauna",
    year = "2015",
    journal = "Russian Geology and Geophysics",
    abstract = "Abstract We summarize data on the biostratigraphic units of the Siberian Ordovician deposits based on pelagic groups of fauna: graptolites, conodonts, and chitinozoans. It is shown that graptolite and conodont zones and beds have a high potential for correlation. We have determined the precise zonal position of most of the lower boundaries of the Ordovician stages and informal Ordovician substages of the International Stratigraphic Chart in the Lower Paleozoic key sections of the Taimyr Peninsula, Siberian Platform, and Altai–Sayan Folded Area.",
    url = "https://doi.org/10.1016/j.rgg.2015.03.010",
    doi = "10.1016/j.rgg.2015.03.010",
    openalex = "W2021930773",
    references = "doi101016jrgg201108004"
}

@article{doi101007s1251701627920,
    author = "Новиков, Д. А.",
    title = "Distribution of Cambrian salts in the western Siberian craton (Yurubcheno-Tokhomo field, Russia)",
    year = "2016",
    journal = "Arabian Journal of Geosciences",
    url = "https://doi.org/10.1007/s12517-016-2792-0",
    doi = "10.1007/s12517-016-2792-0",
    openalex = "W2565671287",
    references = "doi101007978354069426715, doi1010079783642695438, doi101016jearscirev200701001, doi101016jmarpetgeo200401008, doi101016jmarpetgeo201208006, doi101016jorggeochem200703010, doi101016jorggeochem200809011, doi101016s0012825202000673, doi101016s0376736108x70116, doi101144gslsp19961000108, melnikov2010stratigraphic"
}

Abstract Disarticulated net-like plates of the lobopod Microdictyon had a near cosmopolitan distribution from the early to middle Cambrian but are yet to be documented from the North China Platform. Here we report isolated plates of Microdictyon from the lower Cambrian Xinji Formation (Stage 4, Series 2) of the North China Platform, extending the paleogeographic distribution of Microdictyon in the early Cambrian. The plates of Microdictyon from the Xinji Formation are similar to those of other species established on the basis of isolated plates but do bear some new characters, such as mushroom-shaped nodes with a single inclined platform-like apex and an upper surface that displays radial lines. However, the plates documented here are left under open nomenclature due to inadequate knowledge of intraspecific and ontogenetic variation and low specimen numbers. Through comparison of the node shapes of the isolated plates of different Microdictyon species, we consider that low mushroom-shaped nodes could be a primitive and conservative character of Microdictyon while tall mushroom-shaped nodes may be a derived character. Subtle differences in shape and number of node apices may also represent intraspecific or ontogenetic variation.

@article{doi101017jpa201747,
    author = "Pan, Bing and Topper, Timothy P. and Skovsted, Christian B. and Miao, Lanyun and Li, Guoxiang",
    title = "Occurrence of Microdictyon from the lower Cambrian Xinji Formation along the southern margin of the North China Platform",
    year = "2017",
    journal = "Journal of Paleontology",
    abstract = "Abstract Disarticulated net-like plates of the lobopod Microdictyon had a near cosmopolitan distribution from the early to middle Cambrian but are yet to be documented from the North China Platform. Here we report isolated plates of Microdictyon from the lower Cambrian Xinji Formation (Stage 4, Series 2) of the North China Platform, extending the paleogeographic distribution of Microdictyon in the early Cambrian. The plates of Microdictyon from the Xinji Formation are similar to those of other species established on the basis of isolated plates but do bear some new characters, such as mushroom-shaped nodes with a single inclined platform-like apex and an upper surface that displays radial lines. However, the plates documented here are left under open nomenclature due to inadequate knowledge of intraspecific and ontogenetic variation and low specimen numbers. Through comparison of the node shapes of the isolated plates of different Microdictyon species, we consider that low mushroom-shaped nodes could be a primitive and conservative character of Microdictyon while tall mushroom-shaped nodes may be a derived character. Subtle differences in shape and number of node apices may also represent intraspecific or ontogenetic variation.",
    url = "https://doi.org/10.1017/jpa.2017.47",
    doi = "10.1017/jpa.2017.47",
    openalex = "W2761189879",
    references = "demidenko2006new, doi101016b9780444594259000196, doi101016jgr201605005, doi101038345802a0, doi101038351184a0, doi101038nature13576, doi101080031155182010496529, doi101080031155182011533972, doi101098rstb19950029, doi101111j150239311989tb01679x, doi101111let12026, doi10166613009, doi1023073515467, doi105860choice416546, doi107312mcme93416"
}

Results of the geochemical studies on natural brines from regional Vendian reservoirs (Lower-Danilov, Tira, Nepa and Vilyuchan) of the Siberian platform are presented. TDS values of the studied groundwaters and brines range from 17.3 to 583.1 g/dm3, where brines with salinity 280 – 400 g/dm3 are predominant. Brines identified within the Ayan, Bratsk, Balaganka, Upper Chona, Shamanka and other areas, have the highest TDS values.The most widely spread brines belong to five chemical types of Cl Na to Cl Ca composition. TDS concentrations vary widely from 197 to 580 g/dm3 in the Lower Danilov and Tira horizons, and from 170 to 470 g/dm3 in the lower-sitting Nepa and Vilyuchan horizons. Na Cl brines whose TDS concentration reaches the halite precipitation phase should be assigned to infiltration-formed brines on account of salt rock leaching, while strongly metamorphosed brines (S > 300) mostly of Cl and Ca Cl Ca-Mg composition – to sedimentogenic type accounting for those descended from Cambrian salt-bearing deposits, thereby largely explaining the phenomenon of inverse hydrogeochemical zonality in subsalt horizons. The third genetic type, of Cl Ca-Na composition, is rooted in the processes of mixing sodium and calcium types of brines.

@inproceedings{doi101088175513151931012052,
    author = "Novikov, D. and Chernykh, A. and Dultsev, F.",
    title = "Geochemistry of brines in Vendian deposits of the Siberian platform",
    year = "2018",
    journal = "IOP Conference Series: Earth and Environmental Science",
    booktitle = "IOP Conference Series: Earth and Environmental Science",
    abstract = "Results of the geochemical studies on natural brines from regional Vendian reservoirs (Lower-Danilov, Tira, Nepa and Vilyuchan) of the Siberian platform are presented. TDS values of the studied groundwaters and brines range from 17.3 to 583.1 g/dm3, where brines with salinity 280 – 400 g/dm3 are predominant. Brines identified within the Ayan, Bratsk, Balaganka, Upper Chona, Shamanka and other areas, have the highest TDS values.The most widely spread brines belong to five chemical types of Cl Na to Cl Ca composition. TDS concentrations vary widely from 197 to 580 g/dm3 in the Lower Danilov and Tira horizons, and from 170 to 470 g/dm3 in the lower-sitting Nepa and Vilyuchan horizons. Na Cl brines whose TDS concentration reaches the halite precipitation phase should be assigned to infiltration-formed brines on account of salt rock leaching, while strongly metamorphosed brines (S > 300) mostly of Cl and Ca Cl Ca-Mg composition – to sedimentogenic type accounting for those descended from Cambrian salt-bearing deposits, thereby largely explaining the phenomenon of inverse hydrogeochemical zonality in subsalt horizons. The third genetic type, of Cl Ca-Na composition, is rooted in the processes of mixing sodium and calcium types of brines.",
    url = "https://doi.org/10.1088/1755-1315/193/1/012052",
    doi = "10.1088/1755-1315/193/1/012052",
    is_oa = "true",
    pages = "012052",
    semanticscholar_citation_count = "2",
    semanticscholar_id = "4d0b4704743547f6d337a0d7a51fd4cb716ef861",
    volume = "193"
}

@article{doi101134s0869591118030049,
    author = "Mazurov, M. and Grishina, S. and Titov, A. T. and Shikhova, A. V.",
    title = "Evolution of Ore-Forming Metasomatic Processes at Large Skarn Iron Deposits Related to the Traps of the Siberian Platform",
    year = "2018",
    journal = "Petrology",
    url = "https://www.semanticscholar.org/paper/de5ea2b8485d11fd70e8f9c3a362713050cba784",
    doi = "10.1134/S0869591118030049",
    is_oa = "true",
    number = "3",
    pages = "265-279",
    semanticscholar_citation_count = "9",
    semanticscholar_id = "de5ea2b8485d11fd70e8f9c3a362713050cba784",
    volume = "26"
}

@article{parfenova2018naphthide,
    author = "Parfenova, Т.М. and Melnik, D.S. and Kashirtsev, V.А. and Rogov, V.I. and Kochnev, B.B. and Nagovitsyn, К.Е. and Grazhdankin, D.V.",
    title = "NAPHTHIDE SHOWS IN THE VENDIAN AND CAMBRIAN DEPOSITS PERMAFROST (NORTH-EAST OF THE EAST SIBERIAN PLATFORM)",
    year = "2018",
    journal = "Actual Problems of Oil and Gas",
    url = "https://doi.org/10.29222/ipng.2078-5712.2018-23.art89",
    doi = "10.29222/ipng.2078-5712.2018-23.art89",
    number = "23",
    openalex = "W2908778098"
}

Pan, B., Skovsted, C.B., Sun, H.J. & Li, G.X., 18 June 2019. Biostratigraphical and palaeogeographical implications of Early Cambrian hyoliths from the North China Platform. Alcheringa 43, 351–380. ISSN 0311-5518.A succession of diverse hyolith assemblages comprising 10 genera and 14 species are reported from the lower Cambrian Shangwan and Sanjianfang sections of the Xinji Formation, and Xiaomeiyao section of the Houjiashan Formation, which crop out along the southern margin of the North China Platform. Most of the specimens are represented by both conchs and opercula. The identified orthothecids include Conotheca australiensis, Cupitheca holocyclata, C. costellata, Neogloborilus applanatus, N. spinatus, Tegminites hymenodes, Triplicatella disdoma, T. xinjia sp. nov. and Paratriplicatella shangwanensis gen. et sp. nov. The hyolithids comprise Protomicrocornus triplicensis gen. et sp. nov., Microcornus eximius, M. petilus, Parkula bounites and Parakorilithes mammillatus. Some anomalous taxa possess characteristics of both Hyolithida and Orthothecida, such as C. australiensis, Neogloborilus and P. triplicensis. Protomicrocornus may constitute a sister group of other hyolithids. The teeth of Parkula bounites and clavicles of Parakorilithes mammillatus are documented for the first time. The hyolith assemblages from North China are probably coeval, and can be correlated with the Cambrian upper Stage 3–lower Stage 4. Many taxa are also globally distributed and have significant potential for biostratigraphical correlations. In accordance, the hyoliths from North China reveal closest compositional similarities to faunas from eastern Gondwana, and especially South Australia. However, some taxa are shared with Laurentian assemblages suggesting cosmopolitanism, and possibly planktonic larval dispersal.Bing Pan* [bpan@nigpas.ac.cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, PR China; Christian B. Skovsted [christian.skovsted@nrm.se], Department of Palaeobiology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden; Haijing Sun [hjsun1987@163.com], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, PR China; Guoxiang Li [gxli@nigpas.ac.cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, PR China. *Also affiliated with: University of Science and Technology of China, Hefei 230026, PR China and Department of Palaeobiology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden.

@article{doi1010800311551820191577492,
    author = "Pan, Bing and Skovsted, Christian B. and Sun, Haijing and Li, Guoxiang",
    title = "Biostratigraphical and palaeogeographical implications of Early Cambrian hyoliths from the North China Platform",
    year = "2019",
    journal = "Alcheringa An Australasian Journal of Palaeontology",
    abstract = "Pan, B., Skovsted, C.B., Sun, H.J. \& Li, G.X., 18 June 2019. Biostratigraphical and palaeogeographical implications of Early Cambrian hyoliths from the North China Platform. Alcheringa 43, 351–380. ISSN 0311-5518.A succession of diverse hyolith assemblages comprising 10 genera and 14 species are reported from the lower Cambrian Shangwan and Sanjianfang sections of the Xinji Formation, and Xiaomeiyao section of the Houjiashan Formation, which crop out along the southern margin of the North China Platform. Most of the specimens are represented by both conchs and opercula. The identified orthothecids include Conotheca australiensis, Cupitheca holocyclata, C. costellata, Neogloborilus applanatus, N. spinatus, Tegminites hymenodes, Triplicatella disdoma, T. xinjia sp. nov. and Paratriplicatella shangwanensis gen. et sp. nov. The hyolithids comprise Protomicrocornus triplicensis gen. et sp. nov., Microcornus eximius, M. petilus, Parkula bounites and Parakorilithes mammillatus. Some anomalous taxa possess characteristics of both Hyolithida and Orthothecida, such as C. australiensis, Neogloborilus and P. triplicensis. Protomicrocornus may constitute a sister group of other hyolithids. The teeth of Parkula bounites and clavicles of Parakorilithes mammillatus are documented for the first time. The hyolith assemblages from North China are probably coeval, and can be correlated with the Cambrian upper Stage 3–lower Stage 4. Many taxa are also globally distributed and have significant potential for biostratigraphical correlations. In accordance, the hyoliths from North China reveal closest compositional similarities to faunas from eastern Gondwana, and especially South Australia. However, some taxa are shared with Laurentian assemblages suggesting cosmopolitanism, and possibly planktonic larval dispersal.Bing Pan* [bpan@nigpas.ac.cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, PR China; Christian B. Skovsted [christian.skovsted@nrm.se], Department of Palaeobiology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden; Haijing Sun [hjsun1987@163.com], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, PR China; Guoxiang Li [gxli@nigpas.ac.cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, PR China. *Also affiliated with: University of Science and Technology of China, Hefei 230026, PR China and Department of Palaeobiology, Swedish Museum of Natural History, Box 50007, SE-104 05 Stockholm, Sweden.",
    url = "https://doi.org/10.1080/03115518.2019.1577492",
    doi = "10.1080/03115518.2019.1577492",
    openalex = "W2950305063",
    references = "doi101017jpa201747, doi101080031155182010496529, doi10108003115519508619270, doi101134s0031030110080010, doi104202app20120004"
}

The article describes Cambrian reservoirs in the territory of the Turukhano-Irkutsk-Olekminsky facies region, which covers the territory of the southern and central parts of Eastern Siberia and Western Yakutia. In recent years, a significant amount of geological and geophysical work has been carried out on this territory, which made it possible to significantly clarify the oil and gas content of the subsalt and inter-salt Cambrian sediments. It has been shown that Cambrian carbonate horizons are characterized by incompetence of reservoir properties, which is associated with different facial conditions of sediment accumulation, as well as with the development of secondary processes.

@article{fomin2019characteristics,
    author = "Fomin, Andrey and Moiseev, Sergey",
    title = "CHARACTERISTICS OF OIL AND GAS TANKS IN CAMBRIAN DEPOSITS OF THE CENTRAL PART OF THE SIBERIAN PLATFORM",
    year = "2019",
    journal = "Interexpo GEO-Siberia",
    abstract = "The article describes Cambrian reservoirs in the territory of the Turukhano-Irkutsk-Olekminsky facies region, which covers the territory of the southern and central parts of Eastern Siberia and Western Yakutia. In recent years, a significant amount of geological and geophysical work has been carried out on this territory, which made it possible to significantly clarify the oil and gas content of the subsalt and inter-salt Cambrian sediments. It has been shown that Cambrian carbonate horizons are characterized by incompetence of reservoir properties, which is associated with different facial conditions of sediment accumulation, as well as with the development of secondary processes.",
    url = "https://doi.org/10.33764/2618-981x-2019-2-1-183-191",
    doi = "10.33764/2618-981x-2019-2-1-183-191",
    number = "1",
    pages = "183-191",
    volume = "2"
}

The results of paleohydrogeochemical reconstructions of the Lower Cambrian deposits of the Siberian platform are presented. The characteristic of the main biota groups of the Early Cambrian time of the Siberian paleobasin is given. The conditions of formation and compositional features of syngenetic waters are considered. The modern chemistry of the inter–salt brines is mainly of an inherited nature, while the appearance of super–strong brines of calcium chloride composition is due to the processes of deep interaction of the initial sea brine with the host rocks. Based on the analysis of the hydrogeochemical features of the Lower Cambrian sediments, the prediction of the zones of distribution of potassium salts is given.

@inproceedings{andchernykh2020features,
    author = "Chernykh, Anatoly V. and Tokarev, Dmitry A. and Novikov, Dmitry A. and Dultsev, Fedor F.",
    title = "Features of paleohydrogeochemistry of the lower cambrian deposits of the Siberian Platform",
    year = "2020",
    booktitle = "Недропользование. Горное дело. Направления и технологии поиска, разведки и разработки месторождений полезных ископаемых. Экономика. Геоэкология: Материалы XVI международной конференции (20-24 апреля 2020, Новосибирск)",
    abstract = "The results of paleohydrogeochemical reconstructions of the Lower Cambrian deposits of the Siberian platform are presented. The characteristic of the main biota groups of the Early Cambrian time of the Siberian paleobasin is given. The conditions of formation and compositional features of syngenetic waters are considered. The modern chemistry of the inter–salt brines is mainly of an inherited nature, while the appearance of super–strong brines of calcium chloride composition is due to the processes of deep interaction of the initial sea brine with the host rocks. Based on the analysis of the hydrogeochemical features of the Lower Cambrian sediments, the prediction of the zones of distribution of potassium salts is given.",
    url = "https://doi.org/10.18303/b978-5-4262-0102-6-2020-026",
    doi = "10.18303/b978-5-4262-0102-6-2020-026",
    pages = "256-268"
}

Abstract Results of the investigation into the geothermal regime of the Fore‐Yenisey sedimentary basin, formed during the collision and subsidence of the Kas‐Turukhan microcontinent and the western margin of the Siberian craton in the late Neoproterozoic and early Paleozoic are reported. It was established that the structural and geothermal conditions of the upper Precambrian–Paleozoic sections are similar to those in the western regions of the Siberian platform and are characterized by rather low geothermal gradients (12.5–25.5 °C/km). In the western parts of the basin, formation temperatures in the uppermost pre‐Jurassic sediments are 50°C–85°C, decreasing eastward to 30°C–55°C. For the first time, the detailed geothermal model of the basin sedimentary fill was developed. This model allows predictions of the geothermal conditions of Earth's interior.

@article{doi1011111755672414799,
    author = "Новиков, Д. А. and Dultsev, Fedor F. and FILIPPOV, Yuriy",
    title = "Geothermal Model of the Fore‐Yenisey Sedimentary Basin—Transitional Structure between the Ancient Siberian Platform and the Young West Siberian Plate",
    year = "2021",
    journal = "Acta Geologica Sinica - English Edition",
    abstract = "Abstract Results of the investigation into the geothermal regime of the Fore‐Yenisey sedimentary basin, formed during the collision and subsidence of the Kas‐Turukhan microcontinent and the western margin of the Siberian craton in the late Neoproterozoic and early Paleozoic are reported. It was established that the structural and geothermal conditions of the upper Precambrian–Paleozoic sections are similar to those in the western regions of the Siberian platform and are characterized by rather low geothermal gradients (12.5–25.5 °C/km). In the western parts of the basin, formation temperatures in the uppermost pre‐Jurassic sediments are 50°C–85°C, decreasing eastward to 30°C–55°C. For the first time, the detailed geothermal model of the basin sedimentary fill was developed. This model allows predictions of the geothermal conditions of Earth's interior.",
    url = "https://doi.org/10.1111/1755-6724.14799",
    doi = "10.1111/1755-6724.14799",
    openalex = "W3193637296",
    references = "doi101007s1251701627920"
}

Abstract —We present the results of study of the influence of trap magmatism on the geochemical composition of brines and on the geothermal regime of the Earth’s interior in the western areas of the Kureika syneclise. The Siberian trap province, which unites all cutting and layered tholeiite–basic magmatic intrusions and erupted basaltic lava, is the world’s largest Phanerozoic continental basalt province. Brines, hydrocarbon deposits, and organic matter of the sedimentary cover were subjected to a significant thermal impact as a result of the Permo-Triassic trap magmatism. During the trap intrusion, the maximum paleotemperatures in major Silurian (D’yavolskii), Ordovician (Baikit), and Cambrian (Deltula–Tanachi, Abakun, and Moktakon) productive horizons reached 650 °C. The Paleozoic and Proterozoic deposits of the study area contain brines with TDS = 50–470 g/dm3. By chemical composition, they are of Na, Na–Ca, Ca–Na, Ca–Mg, and Ca chloride types (according to the classification by S.A. Shchukarev), with mixed Ca–Na and Na–Ca chloride brines dominating. The studied brines can be divided into three groups according to the degree of metamorphism: low (S1), medium (S2), and high (S3). The first group includes mainly sodium chloride brines with TDS = 50–370 g/dm3 (rNa/rCl = 0.60–0.95; S ≤ 100). The second (dominating) group comprises Na–Ca, Ca–Na, Ca, and Ca–Mg chloride brines with TDS = 150–470 g/dm3 (rNa/rCl = 0.10–0.87; 100 ≤ S ≤ 300). The third group is Ca–Na and Ca chloride brines with TDS = 223–381 g/dm3 (rNa/rCl = 0.12–0.45; S ≥ 300). We have first established changes in the hydrogeochemical field (major- and trace-component and gas compositions) with distance from the contacts of intruded dolerite sills and dikes. Hydrocarbons (CH4, C2H6, C3H8, i-C4H10, n-C4H10, i-C5H12, n-C5H12, and C6H14) and water-soluble components I, B, and NH4 were most actively subjected to destruction. For example, at a distance of 100 m from the intrusion zone, the water-dissolved gases are dominated by CO2 (>90 vol.%), and CH4 amounts to 5 vol.%, whereas at a distance of 250 m, the concentration of CO2 decreases to 30 vol.%, and that of CH4 increases to 60–70 vol.%. In addition to the negative effect on the hydrocarbon preservation in the contact zone (≤400 m), the intrusive trap magmatism favored the formation of hydrocarbons in remote horizons. The reaction of intruding traps with brines of the sedimentary cover led to the saturation of the latter with iron, aluminum, and silica, which suggests extraction of metals in the form of salts from magmatic melts into an ore-bearing fluid.

@article{doi102113rgg20194079,
    author = "Новиков, Д. А. and Gordeeva, A.I. and Chernykh, A. V. and Dultsev, Fedor F. and Zhitova, L.",
    title = "The Influence of Trap Magmatism on the Geochemical Composition of Brines of Petroliferous Deposits in the Western Areas of the Kureika Syneclise (Siberian Platform)",
    year = "2021",
    journal = "Russian Geology and Geophysics",
    abstract = "Abstract —We present the results of study of the influence of trap magmatism on the geochemical composition of brines and on the geothermal regime of the Earth’s interior in the western areas of the Kureika syneclise. The Siberian trap province, which unites all cutting and layered tholeiite–basic magmatic intrusions and erupted basaltic lava, is the world’s largest Phanerozoic continental basalt province. Brines, hydrocarbon deposits, and organic matter of the sedimentary cover were subjected to a significant thermal impact as a result of the Permo-Triassic trap magmatism. During the trap intrusion, the maximum paleotemperatures in major Silurian (D’yavolskii), Ordovician (Baikit), and Cambrian (Deltula–Tanachi, Abakun, and Moktakon) productive horizons reached 650 °C. The Paleozoic and Proterozoic deposits of the study area contain brines with TDS = 50–470 g/dm3. By chemical composition, they are of Na, Na–Ca, Ca–Na, Ca–Mg, and Ca chloride types (according to the classification by S.A. Shchukarev), with mixed Ca–Na and Na–Ca chloride brines dominating. The studied brines can be divided into three groups according to the degree of metamorphism: low (S1), medium (S2), and high (S3). The first group includes mainly sodium chloride brines with TDS = 50–370 g/dm3 (rNa/rCl = 0.60–0.95; S ≤ 100). The second (dominating) group comprises Na–Ca, Ca–Na, Ca, and Ca–Mg chloride brines with TDS = 150–470 g/dm3 (rNa/rCl = 0.10–0.87; 100 ≤ S ≤ 300). The third group is Ca–Na and Ca chloride brines with TDS = 223–381 g/dm3 (rNa/rCl = 0.12–0.45; S ≥ 300). We have first established changes in the hydrogeochemical field (major- and trace-component and gas compositions) with distance from the contacts of intruded dolerite sills and dikes. Hydrocarbons (CH4, C2H6, C3H8, i-C4H10, n-C4H10, i-C5H12, n-C5H12, and C6H14) and water-soluble components I, B, and NH4 were most actively subjected to destruction. For example, at a distance of 100 m from the intrusion zone, the water-dissolved gases are dominated by CO2 (\>90 vol.\%), and CH4 amounts to 5 vol.\%, whereas at a distance of 250 m, the concentration of CO2 decreases to 30 vol.\%, and that of CH4 increases to 60–70 vol.\%. In addition to the negative effect on the hydrocarbon preservation in the contact zone (≤400 m), the intrusive trap magmatism favored the formation of hydrocarbons in remote horizons. The reaction of intruding traps with brines of the sedimentary cover led to the saturation of the latter with iron, aluminum, and silica, which suggests extraction of metals in the form of salts from magmatic melts into an ore-bearing fluid.",
    url = "https://doi.org/10.2113/rgg20194079",
    doi = "10.2113/rgg20194079",
    openalex = "W3174804028",
    references = "doi101007s1251701627920"
}

The paper presents petrographic, geochemical, and new U-Pb zircon (LA-ICP-MS) geochronological data on the Upper Lena Fm. sediments which make part of the Cambrian sedimentary cover of the Siberian craton. The composition of lithic fragments in these clastic sediments, including mafic and felsic volcanics and granitoids, along with the correlation of major element ratios and the values of trace-element ratios point to predominant igneous (mainly felsic) rocks in the provenance. The U-Pb ages of detrital zircons from the sampled Upper Lena Fm. sandstones are mostly Early Paleozoic (∼500 Ma), with very few Archean-Paleoproterozoic determinations and quite many Neoproterozoic zircons. Ediacaran and Earliest Cambrian clastic sediments bearing Early Precambrian and Neoproterozoic detrital zircons, as well as Neoproterozoic and Early Paleozoic complexes of the Central Asian Orogenic Belt, could provide material for the Upper Lena clastic deposition. The geochronological evidence shows that the Upper Lena Fm. sandstones were deposited over vast territories of the southern Siberian craton in the Late Cambrian, in a single sedimentary basin, and originated from the same provenance. The Upper Lena deposition event in the Late Cambrian, immediately before the Ordovician period, makes a key milestone in the geological history of Siberia: the end of a large-scale Early Cambrian transgression and the beginning of gradual uplift of the southern craton margin, at least till the Carboniferous, which was associated with the formation of the Central Asian Orogenic Belt, a major tectonic unit of Asia.

@article{doi101016jjaesx2022100107,
    author = "Gladkochub, Dmitrii P. and Motova, Z. L. and Donskaya, Т. V. and Хубанов, В. Б. and Sizov, Alexander V.",
    title = "Cambrian/Ordovician boundary as a milestone in the sedimentation history of the southern Siberian craton: Evidence from U-Pb dating of detrital zircons",
    year = "2022",
    journal = "Journal of Asian Earth Sciences X",
    abstract = "The paper presents petrographic, geochemical, and new U-Pb zircon (LA-ICP-MS) geochronological data on the Upper Lena Fm. sediments which make part of the Cambrian sedimentary cover of the Siberian craton. The composition of lithic fragments in these clastic sediments, including mafic and felsic volcanics and granitoids, along with the correlation of major element ratios and the values of trace-element ratios point to predominant igneous (mainly felsic) rocks in the provenance. The U-Pb ages of detrital zircons from the sampled Upper Lena Fm. sandstones are mostly Early Paleozoic (∼500 Ma), with very few Archean-Paleoproterozoic determinations and quite many Neoproterozoic zircons. Ediacaran and Earliest Cambrian clastic sediments bearing Early Precambrian and Neoproterozoic detrital zircons, as well as Neoproterozoic and Early Paleozoic complexes of the Central Asian Orogenic Belt, could provide material for the Upper Lena clastic deposition. The geochronological evidence shows that the Upper Lena Fm. sandstones were deposited over vast territories of the southern Siberian craton in the Late Cambrian, in a single sedimentary basin, and originated from the same provenance. The Upper Lena deposition event in the Late Cambrian, immediately before the Ordovician period, makes a key milestone in the geological history of Siberia: the end of a large-scale Early Cambrian transgression and the beginning of gradual uplift of the southern craton margin, at least till the Carboniferous, which was associated with the formation of the Central Asian Orogenic Belt, a major tectonic unit of Asia.",
    url = "https://doi.org/10.1016/j.jaesx.2022.100107",
    doi = "10.1016/j.jaesx.2022.100107",
    openalex = "W4283028765"
}

—Results of a geochemical study of brines and oil occurrences in the Udachnaya kimberlite pipe are presented. Like other intrusions in the Daldyn–Alakit diamondiferous region, this diamond deposit is a unique cryohydrogeologic microstructure differing from the host sedimentary rocks and other diamond pipes of the Yakutian diamond-bearing province. Two waterlogged zones distinguished in the section of orebodies at the explored depths of the deposit correspond to the upper and middle Cambrian aquifers. Predominantly acidic (average pH = 5.5) Cl–Ca and Cl–Ca–Na brines with TDS from 94.3 to 391.3 g/dm3 are widespread within the orebodies and host rocks. The brine mineralization and contents of major salt-forming components increase with depth, to the horizon at the -365 m elevation, where TDS reaches 391 g/dm3, while below, at the –650 m level with noted hydrogeochemical-field inversion, TDS is 253 g/dm3. The mineralization of Cl–Ca, Cl–Ca–Na, Cl–Ca–Mg, and Cl–Ca–Mg–Na brines in the upper Cambrian rocks varies from 102.9 to 192.9 g/dm3, and the pH values, from 4.9 to 6.2, averaging 5.6. Among the microcomponents, the highest average concentrations (mg/dm3) are found for Br1292.8 > S875.7 > Sr453.7 > Fe79.7 > Li53.4 > B32.7 > I13.3 > Si10.8 > Mn6.4 > Se3.6 > Rb2.3. The values of genetic coefficients vary widely: The rNa/rCl coefficient ranges from 0.18 to 0.31; rCa/rMg, from 1.03 to 3.60; Ca/Cl, from 0.2 to 0.3; and the integrated metamorphism index S (according to S.L. Shvartsev) varies from 193 to 277. The middle Cambrian rock complex, containing more saline brines, has been examined in much more detail. It hosts Cl–Ca, Cl–Ca–Na, Cl–Ca–Mg, and Cl–Na–Mg brines with TDS from 94.3 to 391.3 g/dm3 and high average concentrations (mg/dm3) of microcomponents: Br2224.9 > Sr1024.9 >S500.1 > B202.9 > Li147.1 > Fe97.0 > I33.2 > Rb11.4 > Si9.6 > Se9.5 > Mn3.6 > Ni1.7. As compared with brines in the overlying rocks, the middle Cambrian brines show a wider variation in element ratios: rNa/rCl from 0.14 to 0.34, rCa/rMg from 0.66 to 9.71, and Ca/Cl from 0.03 to 0.45. These brines are also characterized by a significantly higher metamorphism grade, which is indicated not only by the rNa/rCl and rCa/rMg ratios but also by the S index varying from 278 to 316. The composition of stable isotopes δD and δ18O) and dissolved inorganic carbon δ13C) of the brines was investigated. The studied waters are assumed to be of sedimentary–metamorphic origin. Their isotopic composition reflects the climatic conditions existing at the time of their burial, which were probably aggravated by the contribution of the oxygen isotope exchange with water-bearing rocks. The δ13C values of carbon dioxide dissolved in water allow an inference about its biogenic origin. The biogenic carbon isotope exchange is governed by the relationship between methanogenic and SMT processes. Analysis of the 87Rb/86Sr and 87Sr/86Sr isotope ratios of the studied brines has revealed affinity between the isotopic compositions of waters in the Cambrian deposits and in ancient seawaters. The mass chromatograms of saturated-hydrocarbon (HC) fractions show at least two individual types of oils and malthas (naphthides). The third variety resulted from their mixing at different stages of migration. The fourth is from the contact zone; it changed during the explosion of kimberlites. The first, most common, type of naphthides (“postexplosive”) is similar in all geochemical parameters to oils from the Nepa–Botuobiya anteclise, in particular, to those from the Mirnyi arch. Oils of the second (pre-explosive) type are found only in the Udachnaya Formation, within the depth range 1130–1430 m.

@article{doi102113rgg20204247,
    author = "Novikov, D. and Ilin, A. and Kashirtsev, V. and Chernykh, A. and Pyryaev, A. and Dultsev, F. and Maksimova, A. and Zueva, I. and Chalaya, O.",
    title = "Geochemistry of Brines and Oil Occurrences in the Udachnaya Kimberlite Pipe (Siberian Platform)",
    year = "2022",
    journal = "Russian Geology and Geophysics",
    abstract = "—Results of a geochemical study of brines and oil occurrences in the Udachnaya kimberlite pipe are presented. Like other intrusions in the Daldyn–Alakit diamondiferous region, this diamond deposit is a unique cryohydrogeologic microstructure differing from the host sedimentary rocks and other diamond pipes of the Yakutian diamond-bearing province. Two waterlogged zones distinguished in the section of orebodies at the explored depths of the deposit correspond to the upper and middle Cambrian aquifers. Predominantly acidic (average pH = 5.5) Cl–Ca and Cl–Ca–Na brines with TDS from 94.3 to 391.3 g/dm3 are widespread within the orebodies and host rocks. The brine mineralization and contents of major salt-forming components increase with depth, to the horizon at the -365 m elevation, where TDS reaches 391 g/dm3, while below, at the –650 m level with noted hydrogeochemical-field inversion, TDS is 253 g/dm3. The mineralization of Cl–Ca, Cl–Ca–Na, Cl–Ca–Mg, and Cl–Ca–Mg–Na brines in the upper Cambrian rocks varies from 102.9 to 192.9 g/dm3, and the pH values, from 4.9 to 6.2, averaging 5.6. Among the microcomponents, the highest average concentrations (mg/dm3) are found for Br1292.8 > S875.7 > Sr453.7 > Fe79.7 > Li53.4 > B32.7 > I13.3 > Si10.8 > Mn6.4 > Se3.6 > Rb2.3. The values of genetic coefficients vary widely: The rNa/rCl coefficient ranges from 0.18 to 0.31; rCa/rMg, from 1.03 to 3.60; Ca/Cl, from 0.2 to 0.3; and the integrated metamorphism index S (according to S.L. Shvartsev) varies from 193 to 277. The middle Cambrian rock complex, containing more saline brines, has been examined in much more detail. It hosts Cl–Ca, Cl–Ca–Na, Cl–Ca–Mg, and Cl–Na–Mg brines with TDS from 94.3 to 391.3 g/dm3 and high average concentrations (mg/dm3) of microcomponents: Br2224.9 > Sr1024.9 >S500.1 > B202.9 > Li147.1 > Fe97.0 > I33.2 > Rb11.4 > Si9.6 > Se9.5 > Mn3.6 > Ni1.7. As compared with brines in the overlying rocks, the middle Cambrian brines show a wider variation in element ratios: rNa/rCl from 0.14 to 0.34, rCa/rMg from 0.66 to 9.71, and Ca/Cl from 0.03 to 0.45. These brines are also characterized by a significantly higher metamorphism grade, which is indicated not only by the rNa/rCl and rCa/rMg ratios but also by the S index varying from 278 to 316. The composition of stable isotopes δD and δ18O) and dissolved inorganic carbon δ13C) of the brines was investigated. The studied waters are assumed to be of sedimentary–metamorphic origin. Their isotopic composition reflects the climatic conditions existing at the time of their burial, which were probably aggravated by the contribution of the oxygen isotope exchange with water-bearing rocks. The δ13C values of carbon dioxide dissolved in water allow an inference about its biogenic origin. The biogenic carbon isotope exchange is governed by the relationship between methanogenic and SMT processes. Analysis of the 87Rb/86Sr and 87Sr/86Sr isotope ratios of the studied brines has revealed affinity between the isotopic compositions of waters in the Cambrian deposits and in ancient seawaters. The mass chromatograms of saturated-hydrocarbon (HC) fractions show at least two individual types of oils and malthas (naphthides). The third variety resulted from their mixing at different stages of migration. The fourth is from the contact zone; it changed during the explosion of kimberlites. The first, most common, type of naphthides (“postexplosive”) is similar in all geochemical parameters to oils from the Nepa–Botuobiya anteclise, in particular, to those from the Mirnyi arch. Oils of the second (pre-explosive) type are found only in the Udachnaya Formation, within the depth range 1130–1430 m.",
    url = "https://pubs.geoscienceworld.org/rgg/article-pdf/63/2/165/5927580/rgg\_04\_feb2022.pdf",
    doi = "10.2113/rgg20204247",
    is_oa = "true",
    number = "2",
    pages = "165-183",
    semanticscholar_citation_count = "2",
    semanticscholar_id = "0fdf4d82f67a96e7bebf561ac27872e478a823a6",
    volume = "63"
}

Modern forecast, exploration and development of hydrocarbon deposits within natural carbonate reservoirs of buried bioherm (reef) structures in the north of the Irkutsk region and the Sakha Republic (Yakutia) areas within the NepaBotuoba Anticline apply the most advanced technologies of 3D seismic exploration and geoelectric prospecting supplemented with a set of new interpretation approaches and analysis attributes contrasted against wide range of well logging data. The recent discoveries of hydrocarbon deposits in the northern reefs shoved the bioherms of the Irkutsk amphitheater in the shadow. The purpose of this research is geological study of biohermal carbonate formations of the Lower Cambrian age in the outcrops of the Bozhekhansky megaswell in the Baikal region. The choice of this object of study is due to the fact that the first oil and gas inflows were obtained from the wells of the Atovskaya, Osinskaya, Birkinskaya, Khristoforovskaya, Balykhtinskaya and Tuturskaya areas. Field geological routes and office processing of data on cuts and polished thin sections of sample surfaces were carried out including microscopic studies in the thin sections of samples and archival collections of cores from deep oil and gas prospecting wells. In 2021–2022, while prospecting in the south of the Irkutsk amphitheater, the authors explored stratified, nodular and columnar stromatolites found within the compound Bozhekhan megaswell of Cambrian carbonate outcroppings. Carbonate intraformational sedimentary breccias identified in the area under investigation feature a great variety in their fragment sizes and inclusions. The stromatolites’ structural features were studied by the cuts and polished thin sections of sample surfaces. Microphytolites were found in the thin sections and described. The authors also took advantage of the opportunity to study an archive collection of the thin sections of VendCambrian and Lower Cambrian carbonate strata from the Akhinskaya area’s wells at the Bozhekhan megaswell and from the Upper-Lena uplift to the north-west. The conducted study implies that Cambrian bioherm outcroppings of the Bozhekhan megaswell-type uplift within the Cis-Baikal trough are, in a sense, model geologic objects. The study of biologic and genetic varieties of Lower Cambrian phytolites, diagnostic features of the organogenic structures, their inner structure and formation processes of the reef ecosystem may provide a region-level prognostic key to the research of Cambrian sediment system in the south of the Siberian platform.

@article{doi1021285268699932022453246264,
    author = "Vakhromeev, A. and Kornilova, T. and Misurkeeva, N. and Urenko, R. S. and Stanevich, A. M. and Stepanova, N. and Pulyaevskiy, M. S.",
    title = "Bioherms of the Bozhekhan uplift in the Cis-Baikal trough as a marginal barrier reef system of a Cambrian salt basin of the southern Siberian platform",
    year = "2022",
    journal = "Earth sciences and subsoil use",
    abstract = "Modern forecast, exploration and development of hydrocarbon deposits within natural carbonate reservoirs of buried bioherm (reef) structures in the north of the Irkutsk region and the Sakha Republic (Yakutia) areas within the NepaBotuoba Anticline apply the most advanced technologies of 3D seismic exploration and geoelectric prospecting supplemented with a set of new interpretation approaches and analysis attributes contrasted against wide range of well logging data. The recent discoveries of hydrocarbon deposits in the northern reefs shoved the bioherms of the Irkutsk amphitheater in the shadow. The purpose of this research is geological study of biohermal carbonate formations of the Lower Cambrian age in the outcrops of the Bozhekhansky megaswell in the Baikal region. The choice of this object of study is due to the fact that the first oil and gas inflows were obtained from the wells of the Atovskaya, Osinskaya, Birkinskaya, Khristoforovskaya, Balykhtinskaya and Tuturskaya areas. Field geological routes and office processing of data on cuts and polished thin sections of sample surfaces were carried out including microscopic studies in the thin sections of samples and archival collections of cores from deep oil and gas prospecting wells. In 2021–2022, while prospecting in the south of the Irkutsk amphitheater, the authors explored stratified, nodular and columnar stromatolites found within the compound Bozhekhan megaswell of Cambrian carbonate outcroppings. Carbonate intraformational sedimentary breccias identified in the area under investigation feature a great variety in their fragment sizes and inclusions. The stromatolites’ structural features were studied by the cuts and polished thin sections of sample surfaces. Microphytolites were found in the thin sections and described. The authors also took advantage of the opportunity to study an archive collection of the thin sections of VendCambrian and Lower Cambrian carbonate strata from the Akhinskaya area’s wells at the Bozhekhan megaswell and from the Upper-Lena uplift to the north-west. The conducted study implies that Cambrian bioherm outcroppings of the Bozhekhan megaswell-type uplift within the Cis-Baikal trough are, in a sense, model geologic objects. The study of biologic and genetic varieties of Lower Cambrian phytolites, diagnostic features of the organogenic structures, their inner structure and formation processes of the reef ecosystem may provide a region-level prognostic key to the research of Cambrian sediment system in the south of the Siberian platform.",
    url = "https://www.nznj.ru/jour/article/download/235/195",
    doi = "10.21285/2686-9993-2022-45-3-246-264",
    is_oa = "true",
    number = "3",
    pages = "246-264",
    semanticscholar_id = "d9cc5cea9dbee2b1415e7ba7f8d7af60ea922159",
    volume = "45"
}

Gas-geochemical oil and gas prospecting studies have been carried out in the west of the Siberian platform within the Baikal anteclise. The above-salt complex was studied as part of the Upper-Middle Cambrian, Ordovician deposits and partly Silurian. More than 5000 samples of rocks represented by siltstones, sandstones, dolomites, limestones, marls were selected. Numerous anomalies in methane and heavy hydrocarbons have been established. As a rule, they are small in area, manifest themselves by tectonic disturbances, partially coincide with local positive structures.

@article{doi1017072chirvinsky2023129,
    author = "Kopylov, I. S.",
    title = "GAS-GEOCHEMICAL INDICATORS OF OIL AND GAS CONTENT IN THE ABOVE-SALT COMPLEX IN THE WEST OF THE SIBERIAN PLATFORM",
    year = "2023",
    journal = "Выпуск 26",
    booktitle = "Выпуск 26",
    abstract = "Gas-geochemical oil and gas prospecting studies have been carried out in the west of the Siberian platform within the Baikal anteclise. The above-salt complex was studied as part of the Upper-Middle Cambrian, Ordovician deposits and partly Silurian. More than 5000 samples of rocks represented by siltstones, sandstones, dolomites, limestones, marls were selected. Numerous anomalies in methane and heavy hydrocarbons have been established. As a rule, they are small in area, manifest themselves by tectonic disturbances, partially coincide with local positive structures.",
    url = "https://press.psu.ru/index.php/miner/article/download/5955/5368/18705",
    doi = "10.17072/chirvinsky.2023.129",
    is_oa = "true",
    pages = "129-133",
    semanticscholar_id = "c358ba57ed2d0408877ed50bf374f0605313dbb7"
}

A brief description of the geological structure of the sedimentary cover within the Kempendyai depression is given, in which two intervals of formation of unstable layers in the Cambrian and Devonian are distinguished, and their salt saturation is estimated. A generalized geo-density model of the sedimentary cover has been compiled, and approximate scales and duration of interruptions in the Phanerozoic sedimentation history are given. Numerical modeling of salt tectogenesis is performed by solving the problem of calculating the creeping flow of a Newtonian fluid with variable density and constant viscosity. The leading role of the surfacing of Devonian salts, the most active phase of which occurred in the Jurassic period, in the formation of local sedimentary cover structures with the subordinate nature of the dynamics of Cambrian salts is shown. It is proposed to identify subcortical zones composed of Devonian diapir salts as the most promising areas in terms of oil and gas content, and possibly in terms of lithium-bearing brines.

@article{doi1018599grs202447,
    author = "Lunev, B. V. and Gubin, I. and Lapkovsky, V. V. and Marinov, R.",
    title = "Modeling of Salt Tectogenesis in Connection With the Choice of the Main Directions for the Search For Hydrocarbon Deposits and Hydromineral Raw Materials Within the Kempendyai Depression (South-East оf the Siberian Platform)",
    year = "2025",
    journal = "Georesources",
    abstract = "A brief description of the geological structure of the sedimentary cover within the Kempendyai depression is given, in which two intervals of formation of unstable layers in the Cambrian and Devonian are distinguished, and their salt saturation is estimated. A generalized geo-density model of the sedimentary cover has been compiled, and approximate scales and duration of interruptions in the Phanerozoic sedimentation history are given. Numerical modeling of salt tectogenesis is performed by solving the problem of calculating the creeping flow of a Newtonian fluid with variable density and constant viscosity. The leading role of the surfacing of Devonian salts, the most active phase of which occurred in the Jurassic period, in the formation of local sedimentary cover structures with the subordinate nature of the dynamics of Cambrian salts is shown. It is proposed to identify subcortical zones composed of Devonian diapir salts as the most promising areas in terms of oil and gas content, and possibly in terms of lithium-bearing brines.",
    url = "https://www.semanticscholar.org/paper/2c8daaad46abc8b4f2b85812570fa98bb6fed048",
    doi = "10.18599/grs.2024.4.7",
    is_oa = "true",
    number = "4",
    pages = "176-186",
    semanticscholar_citation_count = "1",
    semanticscholar_id = "2c8daaad46abc8b4f2b85812570fa98bb6fed048",
    volume = "26"
}

The paper discusses the peculiarities of group, molecular and elemental compositions of bitumens and oils of Usolskaya and Teter Formations of three fields of the central part of Nepsko-Botuobinskaya oil and gas bearing area. Oil (light and heavy) and bitumens (asphaltites and kerites) were studied. In addition to the standard study of free chloroform bitumoids “A”, bound chloroform bitumoids “C”, as well as products of ‘soft’ thermolysis of oil asphaltenes were isolated and analysed at the molecular level. Total ion current chromatograms of saturated fractions of naphthides of all studied samples (except for thermolysate of oil asphaltenes) are characterised by a clear predominance of n-alkane peaks, iso-alkanes, including isoprenoid ones – in subordinate amounts. In all samples of the studied naphthides a number of alkane and terpane facial-genetic molecular parameters indicate the unity of the type of initial bioproducers and reductive conditions of early diagenesis of source rocks. However, in the composition of some samples the increased content of cholestanes and rearranged steranes was registered which are not typical for ancient naphthides of the studied area. Specific HCs – 25-norhopanes C27-C32(C34), adamantanes C10-C14, dialkyl-substituted alkanes (presumably odd C21-C31) and normal α-olefins C14-C29 (in the thermolysate of oil asphaltenes) – were detected in the composition of the studied samples. The data on molecular parameters were processed by the principal component method, which showed differentiation of naphthides in terms of their confinement to the fields, as well as their type, presumably caused by a more intensive impact of thermal and migration factors in the Yuzhno-Danilovskoye and Danilovskoye fields. In general, according to the set of studies performed, it is assumed that the formation of the modern composition of the studied naphthides is also due to recharge of the deposits with new portions of hydrocarbon gases or methane oils. Additional studies of probable source rocks are planned to identify sources of naphthides generation in the studied area.

@article{doi1018599grs2025420,
    author = "Vtorushina, E. A. and Kulkov, M. G. and Salakhidinova, G. T. and Butyrin, R. I. and Aliev, A. E. and Markov, V. V. and Savichev, K. S.",
    title = "Geochemical Characteristics of Naphthides From the Vendian-Lower Cambrian Carbonate Deposits of the Central Part of the Nepsko-Botuobinskaya Oil and Gas Bearing Area",
    year = "2025",
    journal = "Georesursy",
    abstract = "The paper discusses the peculiarities of group, molecular and elemental compositions of bitumens and oils of Usolskaya and Teter Formations of three fields of the central part of Nepsko-Botuobinskaya oil and gas bearing area. Oil (light and heavy) and bitumens (asphaltites and kerites) were studied. In addition to the standard study of free chloroform bitumoids “A”, bound chloroform bitumoids “C”, as well as products of ‘soft’ thermolysis of oil asphaltenes were isolated and analysed at the molecular level. Total ion current chromatograms of saturated fractions of naphthides of all studied samples (except for thermolysate of oil asphaltenes) are characterised by a clear predominance of n-alkane peaks, iso-alkanes, including isoprenoid ones – in subordinate amounts. In all samples of the studied naphthides a number of alkane and terpane facial-genetic molecular parameters indicate the unity of the type of initial bioproducers and reductive conditions of early diagenesis of source rocks. However, in the composition of some samples the increased content of cholestanes and rearranged steranes was registered which are not typical for ancient naphthides of the studied area. Specific HCs – 25-norhopanes C27-C32(C34), adamantanes C10-C14, dialkyl-substituted alkanes (presumably odd C21-C31) and normal α-olefins C14-C29 (in the thermolysate of oil asphaltenes) – were detected in the composition of the studied samples. The data on molecular parameters were processed by the principal component method, which showed differentiation of naphthides in terms of their confinement to the fields, as well as their type, presumably caused by a more intensive impact of thermal and migration factors in the Yuzhno-Danilovskoye and Danilovskoye fields. In general, according to the set of studies performed, it is assumed that the formation of the modern composition of the studied naphthides is also due to recharge of the deposits with new portions of hydrocarbon gases or methane oils. Additional studies of probable source rocks are planned to identify sources of naphthides generation in the studied area.",
    url = "https://doi.org/10.18599/grs.2025.4.20",
    doi = "10.18599/grs.2025.4.20",
    openalex = "W7124140786",
    references = "doi1010079783642717376, doi1010160016703780901738, doi101016b9780080959757008032, doi101016jorggeochem200406014, doi101016jorggeochem201511005, doi101016s0016703701005993, doi101016s0146638096000861, doi101017cbo9781107326040, doi101073pnas1735581100, doi101111j174754571988tb00801x, doi101111jpg12865, parfenova2018naphthide"
}