Seismic Evidence for a Geosuture between the Yangtze and Cathaysia Blocks, South China

被引：122
|
作者：
He, Chuansong [1 ]
Dong, Shuwen [2 ]
Santosh, M. [3 ]
Chen, Xuanhua [2 ]
机构：
[1] China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China
[2] Chinese Acad Geol Sci, Beijing 100037, Peoples R China
[3] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China
来源：
SCIENTIFIC REPORTS | 2013年 / 3卷
关键词：
U-PB; CRUSTAL STRUCTURE; MANTLE STRUCTURE; MOHO DEPTH; BENEATH; SUBDUCTION; DELAMINATION; COLLISION; PROVINCE; PLATEAU;
D O I：
10.1038/srep02200
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：
South China, composed of the Yangtze and Cathaysia Blocks and the intervening Jiangnan orogenic belt, has been central to the debate on the tectonic evolution of East Asia. Here we investigate the crustal structure and composition of South China from seismic data employing the H-k stacking technique. Our results show that the composition and seismic structure of the crust in the Jiangnan orogenic belt are identical to those of the Cathaysia Block. Our data reveal a distinct contrast in the crustal structure and composition between the two flanks of the Jiujiang-Shitai buried fault. We propose that the Jiujiang-Shitai buried fault defines a geosuture between the Yangtze and Cathaysia Blocks, and that the felsic lower crust of the Cathaysia Block and the Jiangnan orogenic belt may represent fragments derived from the Gondwana supercontinent.
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页数：7
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