New data on Upper Carboniferous–Lower Permian deposits of Bol'shevik Island, Severnaya Zemlya Archipelago

Polar research

Andrey K. Khudoley¹  Victoria B. Ershova²  Andrei V. Prokopiev³  Anatoly M. Nikishin⁴  Nikolay A. Malyshev⁵  Valery A. Nikishin⁵ 

[1] Department of Regional GeologyInstitute of Earth Science, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg RU-199034, Russia;Department of Regional GeologyInstitute of Earth Science, St. Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg RU-199034, RussiaCorrespondence;Diamond and Precious Metal Geology InstituteSiberian Branch, Russian Academy of Sciences, Lenina 39, Yakutsk RU-677980, Russia;Faculty of Geology, Moscow State University, Leninskie gory 1, Moscow RU-119991, Russia;RosneftVereyskaya 17, Moscow RU-121357, Russia

关键词: Severnaya Zemlya Archipelago;    Arctic;    detrital zircon;    Late Palaeozoic;    tectonic;   

DOI  :  10.3402/polar.v34.24558

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

We present here a detailed study of the Upper Carboniferous–Lower Permian stratigraphy of Bol'shevik Island in the Severnaya Zemlya Archipelago, consisting of the analysis of sedimentary structures and lithostratigraphy, U/Pb detrital zircon dating and structural studies. The preserved sedimentary structures suggest that the studied strata were deposited in a relatively small meandering fluvial system. U/Pb dating of detrital zircons reveals that the Upper Carboniferous–Lower Permian sandstones contain a primary age population ranging from 450 to 570 millions of years, with a predominance of Early–Middle Ordovician zircons. This detrital zircon distribution indicates that the studied formations were derived locally from the erosion of Lower Ordovician deposits of Bol'shevik Island or elsewhere in the archipelago. Our structural studies suggest that Upper Carboniferous–Lower Permian deposits are deformed into a series of west–north-west verging open asymmetric folds, suggesting a west–north-west direction ...

【 授权许可】

CC BY-NC