关于芬诺斯堪地盾古近纪区域地层尺度的新数据（科拉半岛伊纳里地层超岩体的同位素地球化学和年龄）

IF 0.7 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Doklady Earth Sciences Pub Date : 2024-08-11 DOI:10.1134/s1028334x24602773

A. B. Vrevsky, A. B. Kuznetsov, P. A. Lvov

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引用次数: 0

摘要

摘要本文提供了新的同位素数据，从而有可能确定塔尔贾地层在早前寒武纪区域地层尺度上的地层位置。首次获得的塔尔贾地层玄武岩的 U-Th-Pb 年龄为 1926 ± 7 Ma，这表明该地层与卡斯卡马地层同属一个时期，再加上卡斯卡马地层和塔尔贾地层的类型成分具有相似的同位素地球化学组成（柯马铁质玄武岩、铝质偏玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩、铝质玄武岩）、铝质玄武岩和偏闪长岩），极大地扩展了对芬诺斯堪地盾科拉-挪威地区古新生代卡勒维超地层所构成区域范围的了解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

New Data on the Regional Stratigraphic Scale of the Paleoproterozoic of the Fennoscandian Shield (Isotope Geochemistry and Age of Supracrustal Rock Complexes of the Inari Terrane, Kola Peninsula)

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New Data on the Regional Stratigraphic Scale of the Paleoproterozoic of the Fennoscandian Shield (Isotope Geochemistry and Age of Supracrustal Rock Complexes of the Inari Terrane, Kola Peninsula)

Abstract

New isotopic data are presented in this paper that make it possible to determine the stratigraphic position of the Talja Formation on the regional stratigraphic scale of the Early Precambrian. The U‒Th‒Pb age of 1926 ± 7 Ma obtained for the first time for metarhyodacites of the Talja Formation indicates that this formation is coeval to the Kaskama Formation, which, together with the similar isotope–geochemical composition of the type varieties of the Kaskama and Talja formations (komatiitic basalts, aluminous metabasalts, and metarhyodacites), significantly expands the understanding of the extent of the area composed of the Paleoproterozoic Kalevian Superhorizon within the Kola–Norwegian region of the Fennoscandian shield.

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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.