Grenville and Valhalla Tectonic Events at the Western Margin of the Siberian Craton: Evidence from Rocks of the Garevka Complex, Northern Yenisei Range, Russia

IF 1 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Petrology Pub Date : 2023-03-21 DOI:10.1134/S0869591123010058
I. I. Likhanov
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引用次数: 1

Abstract

Understanding the tectonic evolution of the Yenisei Range offers important clues not only for the tectonic evolution of orogenic belts at margins of ancient cratons but also for solving the problem of the incorporation of the Siberian craton into the Rodinia supercontinent. Results of mineralogical−petrological, geochemical, and isotope–geochemical studies provide an insight into the petrogenesis, geotectonic settings, thermodynamic parameters of formation, and the ages of the metamorphism and protoliths for the contrastingly compositionally different rocks of the Garevka metamorphic complex. The paper discusses the possible models for the origin of the rock complexes and the geodynamic settings in which they were formed. The western margin of the Siberian craton was determined to have been affected by two pulses of Neoproterozoic endogenic activity, which were related to the origin of the Rodinia supercontinent (930–900 and 880–845 Ma), and which correlated with Grenville and post-Grenville processes responsible for Valhalla folding. The regional geodynamic history is correlated with the coeval sequence and similar style of tectono−thermal events in the peripheries of the large Precambrian cratons Laurentia and Baltica, which is consistent with the proposed Neoproterozoic paleogeographic reconstructions of close spatiotemporal relationships between these cratons and their incorporation into Rodinia configuration.

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西伯利亚克拉通西缘的Grenville和Valhalla构造事件:来自俄罗斯叶尼塞山脉北部Garevka杂岩的证据
了解叶尼塞山脉的构造演化,不仅为古克拉通边缘造山带的构造演化提供了重要线索,而且为解决西伯利亚克拉通并入罗迪尼亚超大陆的问题提供了重要线索。矿物-岩石学、地球化学和同位素-地球化学研究的结果,为了解Garevka变质杂岩的岩石成因、大地构造背景、形成的热力学参数以及变质作用和原岩的年龄提供了依据。本文讨论了杂岩的可能成因模式及其形成的地球动力学背景。西伯利亚克拉通西缘受两次新元古代内生活动的影响,这两次内生活动与Rodinia超大陆的起源(930-900和880-845 Ma)有关,并与导致Valhalla褶皱的Grenville和后Grenville过程相关。区域地球动力学历史与Laurentia和Baltica大型前寒武纪克拉通周缘的同期序列和相似的构造-热事件类型相关联,这与新元古代古地理重建所提出的这两个克拉通与它们并入Rodinia构造之间密切的时空关系相一致。
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来源期刊
Petrology
Petrology 地学-地球科学综合
CiteScore
2.40
自引率
20.00%
发文量
27
审稿时长
>12 weeks
期刊介绍: Petrology is a journal of magmatic, metamorphic, and experimental petrology, mineralogy, and geochemistry. The journal offers comprehensive information on all multidisciplinary aspects of theoretical, experimental, and applied petrology. By giving special consideration to studies on the petrography of different regions of the former Soviet Union, Petrology provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.
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