Artem Plotitsyn | Institute of Geology Komi Science Center of Uralian Branch of Russian Academy of Sciences (original) (raw)
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The Upper Devonian — Lower Carboniferous stratigraphic interval of the North of Urals and Urals F... more The Upper Devonian — Lower Carboniferous stratigraphic interval of the North of Urals and Urals Foredeep is promising for search of hydrocarbons and other mineral deposits. So urgent is the establishment of a detailed stratigraphic framework and the identification of levels with the high correlation potential. Conodont biostratigraphic boundaries (expansa, praesulcata, sulcata, duplicata, sandbergi, quadruplicata, and isosticha zones) and global events (Dasberg, Hangenberg, and Lower Alum Shale) in the Upper Famennian — Tournaisian of the North Urals and Chernyshev Swell (Kozhim River section, Syvyu River section, Izyael River section and Malaya Usa River section) are characterized. As a result the levels having the highest correlation potential (base of the sulcata Zone, base of the quadruplicata Zone, transgressive phases of the Hangenberg Event and Lower Alum Shale Event) are identified. Detailed studies of the distribution of conodonts in the Devonian-Carboniferous boundary interval revealed that taxa Polygnathus purus Voges and Pseudopolygnathus primus Branson et Mehl begin its spread on the level of the first appearance of Siphonodella sulcata (Huddle). Consequently, they are on a par with Siphonodella sulcata (Huddle) can determine the position of the boundary between the systems in the sections of the North Urals and Chernyshev Swell.
The article presents new information concerning taxonomic composition of the biota of the Upper D... more The article presents new information concerning taxonomic composition of the biota of the Upper Devonian deposits of the River Sharyu. By studying a collection of conodonts and brachiopods the stratigraphic position of the section was clarified. The fauna propagation analysis revealed that the boundary between Frasnian and Famennian stages is opened twice in this outcrop. This fact is explained by complex tectonics of the Chernyshev swell.
The article presents new results of biostratigraphic and isotopic analyses for the Upper Famennia... more The article presents new results of biostratigraphic and isotopic analyses for the Upper Famennian - Lower Tournaisian deep-water deposits of the Syvyu River section. Ostracode and conodont faunal changes, interpretation of lithological particularities and O and C isotopic variations enabled description of the boundary of the Systems, and identify stratigraphic equivalents of the Hangenberg Shale.
The Upper Devonian — Lower Carboniferous stratigraphic interval of the North of Urals and Urals F... more The Upper Devonian — Lower Carboniferous stratigraphic interval of the North of Urals and Urals Foredeep is promising for search of hydrocarbons and other mineral deposits. So urgent is the establishment of a detailed stratigraphic framework and the identification of levels with the high correlation potential. Conodont biostratigraphic boundaries (expansa, praesulcata, sulcata, duplicata, sandbergi, quadruplicata, and isosticha zones) and global events (Dasberg, Hangenberg, and Lower Alum Shale) in the Upper Famennian — Tournaisian of the North Urals and Chernyshev Swell (Kozhim River section, Syvyu River section, Izyael River section and Malaya Usa River section) are characterized. As a result the levels having the highest correlation potential (base of the sulcata Zone, base of the quadruplicata Zone, transgressive phases of the Hangenberg Event and Lower Alum Shale Event) are identified. Detailed studies of the distribution of conodonts in the Devonian-Carboniferous boundary interval revealed that taxa Polygnathus purus Voges and Pseudopolygnathus primus Branson et Mehl begin its spread on the level of the first appearance of Siphonodella sulcata (Huddle). Consequently, they are on a par with Siphonodella sulcata (Huddle) can determine the position of the boundary between the systems in the sections of the North Urals and Chernyshev Swell.
The article presents new information concerning taxonomic composition of the biota of the Upper D... more The article presents new information concerning taxonomic composition of the biota of the Upper Devonian deposits of the River Sharyu. By studying a collection of conodonts and brachiopods the stratigraphic position of the section was clarified. The fauna propagation analysis revealed that the boundary between Frasnian and Famennian stages is opened twice in this outcrop. This fact is explained by complex tectonics of the Chernyshev swell.
The article presents new results of biostratigraphic and isotopic analyses for the Upper Famennia... more The article presents new results of biostratigraphic and isotopic analyses for the Upper Famennian - Lower Tournaisian deep-water deposits of the Syvyu River section. Ostracode and conodont faunal changes, interpretation of lithological particularities and O and C isotopic variations enabled description of the boundary of the Systems, and identify stratigraphic equivalents of the Hangenberg Shale.