Zircon U-Pb SHRIMP ages of eclogites from the North Qilian Mountains in NW China and their tectonic implication

被引：0

作者：

SONG Shuguang ZHANG Lifei NIU Yaoling SONG Biao ZHANG Guibing WANG Qianjie MOE Key Laboratory of Orogenic Belts and Crustal Evolution Department of Geology Peking University Beijing China Department of Geology University of Houston Houston TX USA Beijing SHRIMP Centre Institute of Geology CAGS Beijing China Correspondence should be addressed to Zhang Lifei email lfzhang pkueducn ^{[1
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机构：

来源：

ChineseScienceBulletin | 2004年 / 08期

关键词：

high-pressure metamorphism; eclogite; zircon age; North Qilian Mountains;

D O I：

暂无

中图分类号：

P597 [同位素地质学与地质年代学];

学科分类号：

070902 ;

摘要：

Cathodoluminescence (CL) imaging and ion microprobe (SHRIMP) U-Pb dating were carried out for zircons from eclogites in the North Qilian Mountains. The results show weighted mean ages of 463 6 Ma and 468 13 Ma for two samples, respectively. These ages are the earliest record of Caledonian high-pressure metamorphism in the North Qilian Mountains, and they may represent the timing of eclogite-facies metamorphism when the oceanic crust was subducted to mantle depths in this orogenic belt.

引用

页码：848 / 852

页数：5