Zircon U-PbSHRIMP ages of high-pressure granulite in Yushugou ophiolitic terrane in southern Tianshan and their tectonic implications

被引：137
|
作者：
Zhou, DW
Su, L [1 ]
Jian, P
Wang, RS
Liu, XM
Lu, GX
Wang, JL
机构：
[1] Minist Educ, Key Lab Continental Dynam, Xian 710069, Peoples R China
[2] NW Univ Xian, Dept Geol, Xian 710069, Peoples R China
[3] Beijing SHRIMP Ctr, Beijing 100037, Peoples R China
来源：
CHINESE SCIENCE BULLETIN | 2004年 / 49卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Yushugou ophiolite; SHRIMP U-Pb dating; granulite facies metamorphism; southern Tianshan;
D O I：
10.1360/03wd0598
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Zircons from two high-pressure granulite samples from the Yushugou ophiolitic terrane, southern Tianshan have been investigated by cathodoluminescence, LAICPMS and ion microprobe (SHRIMP) for their internal textures, trace elemental compositions and in situ dating. The weighted mean ages of these two samples are 392 7 and 390 11 Ma, respectively, representing the granulite-facies metamorphic age of the ophiolitic terrane, and indicating that the southern Tianshan ocean initiated its northward subduction since the early Devonian.
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页码：1415 / 1419
页数：5
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