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

被引：27

作者：

Wenli Ling

Shan Gao

Jianping Ouyang

Benren Zhang

Huimin Li

机构：

[1] China University of Geosciences,Faculty of Earth Sciences

[2] Ministry of Education of China,Key Laboratory of Lithosphere Construction, Deep Processes and Exploration Techniques

[3] Northwest University,Department of Geologg

[4] Tianjin Institute of Geology and Mineral Resources,undefined

来源：

Science in China Series D: Earth Sciences | 2002年 / 45卷 / 9期

关键词：

Yangtze block; Xixiang Group; U-Pb chronology; geochemistry; tectonic setting;

D O I：

10.1007/BF02879516

中图分类号：

学科分类号：

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 tectono-thermal events, resulting in the resetting of their Rb-Sr isotopic system.

引用

页码：818 / 831

页数：13

共 63 条

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