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
收藏
页码：621 / 626
页数：6
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