成果归属机构：

地球科学与资源学院

作者：

Yin, An ; Dang, Yu-Qi ; Zhang, Min ; Chen, Xuan-Hua ; McRivette, Michael W.

单位：

China Univ Geosci, Sch Earth Sci & Resources, Struct Geol Grp, Beijing 100083, Peoples R China;Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA;Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA;Qinghai Oilfield Co, Dunhuang, Gansu, Peoples R China;Chinese Acad Geol Sci, Inst Geomech, Beijing, Peoples R China

关键词：

Qaidam basin; Tibetan plateau; Eastern Kunlun Range; tectonics; deformation; upper crust; Cenozoic

摘要：

The Qaidam basin is the largest topographic depression inside the Tibetan plateau. Because of its central position, understanding the tectonic origin of the Qaidam basin has important implications for unraveling the formation mechanism and growth history of the Tibetan plateau. In order to achieve this goal, we analyzed regional seismic-reflection profiles across the basin and a series of thickness-distribution patterns of Cenozoic strata at different time slices. The first-order structure of the basin is a broad Cenozoic synclinorium, which has an amplitude ranging from >16 km in the west to 48% in the west to 500 km wide in the north-south direction between the Qilian Shan and Fenghuo Shan thrust belts in the north and south. The development of this large Paleogene basin in central Tibet and its subsequent destruction and partitioning by the Neogene uplift of the Eastern Kunlun Range requires a highly irregular sequence of deformation, possibly controlled by preexisting weakness in the Tibetan lithosphere.

语种：

英文

DOI：

10.1130/B26232.1

来源：

GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2008(7-8):847-876.

出版日期：

2008-07

提交日期：

2017-12-14

引用参考：

Yin, An; Dang, Yu-Qi; Zhang, Min; Chen, Xuan-Hua; McRivette, Michael W.. Cenozoic tectonic evolution of the Qaidam basin and its surrounding regions (Part 3): Structural geology, sedimentation, and regional tectonic reconstruction[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2008(7-8):847-876.