Early Ordovician Age of Suprasubduction Ophiolites in the Northeastern Part of Central Kazakhstan: U-Th-Pb (SIMS) Dating of Plagiogranites

被引：2

作者：

Degtyarev, K. E. ^{[1
]}

Tretyakov, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Geol Inst, Moscow 119017, Russia

来源：

DOKLADY EARTH SCIENCES | 2020年 / 493卷 / 02期

基金：

俄罗斯科学基金会;

关键词：

suprasubduction ophiolites; plagiogranites; zircon; Early Ordovician;

D O I：

10.1134/S1028334X2008005X

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Suprasubduction zone ophiolites in the Bayanaul and Maikain-Kyzyltas zones in the northeastern part of Central Kazakhstan were studied. U-Pb dating of plagiogranites that constitute the plutonic complexes of the ophiolite sections was performed. The Early Ordovician age estimates of 480 +/- 3 Ma for the plagiogranites in the Bayanaul zone and 477 +/- 2 Ma in the Maikain-Kyzyltas zone were obtained for the first time. It was demonstrated that the formation time span of the plutonic and volcanosedimentary complexes in the studied ophiolites does not exceed 7-10 Ma.

引用

页码：621 / 626

页数：6

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