Time and tectonic setting of the Xixiang Group: Constraints from zircon U-Pb geochronology and geochemistry

被引：18
|
作者：
Ling, WL [1 ]
Gao, S
Ouyang, JP
Zhang, BR
Li, HM
机构：
[1] China Univ Geosci, Fac Earth Sci, Wuhan 430074, Peoples R China
[2] Minist Educ China, Key Lab Lithosphere Construct Deep Proc & Explora, Wuhan 430074, Peoples R China
[3] NW Univ Xian, Dept Geol, Xian 710069, Peoples R China
[4] Tianjin Inst Geol & Mineral Resources, Tianjin 300170, Peoples R China
来源：
SCIENCE IN CHINA SERIES D-EARTH SCIENCES | 2002年 / 45卷 / 09期
基金：
中国国家自然科学基金;
关键词：
Yangtze block; Xixiang Group; U-Pb chronology; geochemistry; tectonic setting;
D O I：
10.1360/02yd9081
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The present paper reports the research development in the timing and tectonic setting of the Xixiang Group, northwestern margin of the Yangtze block. U-Pb concordant ages of (946 +/-18) Ma and (904+/-18) Ma of zircons were obtained from the upper and lower units of the Xixiang volcanic succession, respectively. Elemental and Nd isotope characteristics show that the volcanic suite has the affinities of arc island magmatism as well as an evolution trend of tectonic setting from front-arc to back-arc. The volcanic rocks suffered from some extensive post-stage tectonothermal events, resulting in the resetting of their Rb-Sr isotopic system.
引用
收藏
页码：818 / 831
页数：14
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