Triassic Volcaniclastic and Igneous Rocks of the Pronchishchev Ridge (East Siberia, Arctic): Composition, Structure, Genesis, and Age

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Triassic Volcaniclastic and Igneous Rocks of the Pronchishchev Ridge (East Siberia, Arctic): Composition, Structure, Genesis, and Age. / Popov, A. Yu; Shevko, A. Ya; Sobolev, E. S. et al.

In: Russian Geology and Geophysics, Vol. 64, No. 6, 06.2023, p. 633-646.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{baab2bc5171a49d68f506bd642dd6234,

title = "Triassic Volcaniclastic and Igneous Rocks of the Pronchishchev Ridge (East Siberia, Arctic): Composition, Structure, Genesis, and Age",

abstract = "Petrographic and geochemical studies of igneous and volcaniclastic rocks of the middle part of the Pronchishchev Ridge and the Terpei lowland provided new data on their composition and structure. The subdivision of the Permian–Lower Triassic strata enclosing igneous and volcaniclastic bodies has been clarified by lithological/stratigraphic methods. The Lower Triassic Ulakhan-Yuryakh, Chekanovsky, Ystanakh, and Pastakh formations have been traced for the first time in the ridge area. It is shown that the studied dolerite body and adjacent breccias in the field of middle–upper Permian rocks are part of the volcanic pipe. The tuffite sandy gritstones in the field of Lower Triassic rocks are parts of an eroded tephra ring around this diatreme. The localization of tuffite bodies in the area of the Ystanakh Formation makes it possible to date the pipe at the beginning of the late Olenekian. The obtained40Ar/39Ar dates for the dolerites of the volcanic pipe and one of the dikes of the Pronchishchev dike belt indicate the repeated tectonomagmatic activity in the studied area in the Triassic.",

keywords = "Arctic, East Siberia, Lower Triassic, Permian, diatreme",

author = "Popov, {A. Yu} and Shevko, {A. Ya} and Sobolev, {E. S.} and Yadrenkin, {A. V.} and Nikitenko, {B. L.} and Travin, {A. V.}",

note = "The research was financially supported by project 19-17-00091-P from the Russian Science Foundation and by grants FWZZ-2022-0004, FWZZ-2022-0005, and FWZZ-2022-0008 from the Foundation for Basic Research. It was also performed on the state assignment at the Institute of Geolo- gy and Mineralogy, Novosibirsk, with partial financial support by the Ministry of Education and Science of the Russian Federation.",

year = "2023",

month = jun,

doi = "10.2113/RGG20224501",

language = "English",

volume = "64",

pages = "633--646",

journal = "Russian Geology and Geophysics",

issn = "1068-7971",

publisher = "Elsevier Science B.V.",

number = "6",

}

RIS

TY - JOUR

T1 - Triassic Volcaniclastic and Igneous Rocks of the Pronchishchev Ridge (East Siberia, Arctic): Composition, Structure, Genesis, and Age

AU - Popov, A. Yu

AU - Shevko, A. Ya

AU - Sobolev, E. S.

AU - Yadrenkin, A. V.

AU - Nikitenko, B. L.

AU - Travin, A. V.

N1 - The research was financially supported by project 19-17-00091-P from the Russian Science Foundation and by grants FWZZ-2022-0004, FWZZ-2022-0005, and FWZZ-2022-0008 from the Foundation for Basic Research. It was also performed on the state assignment at the Institute of Geolo- gy and Mineralogy, Novosibirsk, with partial financial support by the Ministry of Education and Science of the Russian Federation.

PY - 2023/6

Y1 - 2023/6

N2 - Petrographic and geochemical studies of igneous and volcaniclastic rocks of the middle part of the Pronchishchev Ridge and the Terpei lowland provided new data on their composition and structure. The subdivision of the Permian–Lower Triassic strata enclosing igneous and volcaniclastic bodies has been clarified by lithological/stratigraphic methods. The Lower Triassic Ulakhan-Yuryakh, Chekanovsky, Ystanakh, and Pastakh formations have been traced for the first time in the ridge area. It is shown that the studied dolerite body and adjacent breccias in the field of middle–upper Permian rocks are part of the volcanic pipe. The tuffite sandy gritstones in the field of Lower Triassic rocks are parts of an eroded tephra ring around this diatreme. The localization of tuffite bodies in the area of the Ystanakh Formation makes it possible to date the pipe at the beginning of the late Olenekian. The obtained40Ar/39Ar dates for the dolerites of the volcanic pipe and one of the dikes of the Pronchishchev dike belt indicate the repeated tectonomagmatic activity in the studied area in the Triassic.

AB - Petrographic and geochemical studies of igneous and volcaniclastic rocks of the middle part of the Pronchishchev Ridge and the Terpei lowland provided new data on their composition and structure. The subdivision of the Permian–Lower Triassic strata enclosing igneous and volcaniclastic bodies has been clarified by lithological/stratigraphic methods. The Lower Triassic Ulakhan-Yuryakh, Chekanovsky, Ystanakh, and Pastakh formations have been traced for the first time in the ridge area. It is shown that the studied dolerite body and adjacent breccias in the field of middle–upper Permian rocks are part of the volcanic pipe. The tuffite sandy gritstones in the field of Lower Triassic rocks are parts of an eroded tephra ring around this diatreme. The localization of tuffite bodies in the area of the Ystanakh Formation makes it possible to date the pipe at the beginning of the late Olenekian. The obtained40Ar/39Ar dates for the dolerites of the volcanic pipe and one of the dikes of the Pronchishchev dike belt indicate the repeated tectonomagmatic activity in the studied area in the Triassic.

KW - Arctic

KW - East Siberia

KW - Lower Triassic

KW - Permian

KW - diatreme

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85168090178&origin=inward&txGid=e621afc8bd6c1ccfe1e72c663fd7a198

UR - https://www.mendeley.com/catalogue/c141764a-0ee6-382c-bba2-9f273e9327d9/

U2 - 10.2113/RGG20224501

DO - 10.2113/RGG20224501

M3 - Article

VL - 64

SP - 633

EP - 646

JO - Russian Geology and Geophysics

JF - Russian Geology and Geophysics

SN - 1068-7971

IS - 6

ER -

ID: 55589819