PROVENANCE OF THE PERMIAN-TRIASSIC RED BEDS FROM THE EASTERN PART OF THE MOSCOW BASIN, EAST EUROPEAN PLATFORM: U-Pb LA-ICP-MS AND RAMAN SPECTROSCOPY DETRITAL ZIRCON DATA

Geodinamika i Tektonofizika Pub Date : 2023-10-17 DOI:10.5800/gt-2023-14-5-0718

A. V. Chistyakova, R. V. Veselovskiy, V. B. Khubanov, A. V. Ivanov, A. E. Marfin, N. V. Bryanskiy, V. K. Golubev

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Abstract

We present the first systematic results of U-Pb LA-ICP-MS dating of detrital zircons from 12 samples representing different stratigraphic levels of 5 sections of the Permian-Triassic rocks, located within the eastern part of the Moscow basin (syneclise) – Zhukov ravine, Astashikha, Nedubrovo, Balebikha and Klykovo. It is shown that the accumulation of the Upper Permian and Lower Triassic terrigenous complexes occurred under the influence of competing sources with two contrasting provenance signals with Neoproterozoic (Vendian)-Paleozoic and Paleo-Mesoproterozoic ages. The identified provenance signal patterns were used to detail the correlation and stratigraphic subdivision of the Permian-Triassic terrigenous complex of the Moscow basin. Raman spectroscopy of detrital zircon, first applied to the Permian-Triassic rocks of the East European platform, made it possible to identify sedimentary complexes of a relatively older terrigenous basin as a separate source of zircons, which experienced superimposed thermal impact in the VendianCambrian time (~500–600 Ma).

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东欧地台莫斯科盆地东部二叠纪-三叠纪红层物源:U-Pb LA-ICP-MS和拉曼光谱碎屑锆石资料

本文首次对来自莫斯科盆地东部朱可夫峡谷、Astashikha、Nedubrovo、Balebikha和Klykovo 5个不同地层剖面的12个样品的碎屑锆石进行了U-Pb LA-ICP-MS测年。结果表明，上二叠统和下三叠统陆源杂岩的成藏是在竞争源的影响下形成的，具有新元古代(文甸)-古生代和古-中元古代两种截然不同的物源信号。利用识别的物源信号模式，对莫斯科盆地二叠系—三叠系陆源杂岩进行了对比和地层划分。碎屑锆石的拉曼光谱首次应用于东欧地台的二叠纪-三叠纪岩石，使相对较古老的陆源盆地沉积复合体作为单独的锆石来源成为可能，这些沉积复合体经历了温叠-寒武纪(~ 500-600 Ma)的叠加热冲击。

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Geodinamika i Tektonofizika

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