中二叠世萨班图伊铬铁矿古矿床（前乌拉尔山南部）屑状锆石的 U-Pb 年龄

IF 0.7 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Doklady Earth Sciences Pub Date : 2024-04-19 DOI:10.1134/s1028334x24601664

I. R. Rakhimov, E. V. Pushkarev, V. S. Chervyakovskiy, S. A. Dyakova

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引用次数: 0

摘要

摘要首次获得了来自南前乌拉尔地区中二叠世萨班图古生界铬铁矿砂岩的锆石碎片的 U-Pb 同位素数据。U-Pb 年代的分布是单峰的，峰值在 420-400 Ma。三分之二的年代为泥盆纪，其中一半以上的年代为早泥盆纪，在这一时期，南乌拉尔地区形成了超俯冲蛇绿岩和伴随的高压变质复合体，并发生了超基性岩浆活动。这些在空间上结合在一起的地质体暴露在乌拉尔主断层的熔融带中，或在构造上作为蛇绿混杂岩向西移动，是萨班图古矿床中的铁铬铁矿和锆石的主要来源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

U–Pb Age of Detrital Zircons from the Middle Permian Sabantuy Chromite Paleoplacer (Southern Pre-Urals)

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U–Pb Age of Detrital Zircons from the Middle Permian Sabantuy Chromite Paleoplacer (Southern Pre-Urals)

Abstract

The first U–Pb isotope data of detrital zircon from chromite sandstones of the Middle Permian Sabantuy paleoplacer, Southern Pre-Urals, has been obtained. The distribution of U–Pb dates is unimodal with a peak at 420–400 Ma. Two-thirds of all ages are Devonian, and more than half of them correspond to the Early Devonian, during which supra-subduction ophiolitic and accompanying high-pressure metamorphic complexes were formed in the Southern Urals and ultramafic-mafic magmatism occurred. These spatially combined geological bodies, exposed in the melange zone of the Main Uralian Fault or tectonically moved to the west as ophiolite allochthons, are the main sources of detrital chromite and zircon in the Sabantuy paleoplacer.

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来源期刊

Doklady Earth Sciences 地学-地球科学综合

CiteScore

1.40

自引率

22.20%

发文量

138

审稿时长

3-6 weeks

期刊介绍： Doklady Earth Sciences is a journal that publishes new research in Earth science of great significance. Initially the journal was a forum of the Russian Academy of Science and published only best contributions from Russia. Now the journal welcomes submissions from any country in the English or Russian language. Every manuscript must be recommended by Russian or foreign members of the Russian Academy of Sciences.