Early Cretaceous Thrust and Nappe Tectonics in North Qilian Shan, Northern Tibetan Plateau: Evidence from Field Mapping, Geochronology, and Deep Structural Analysis
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This study was financially supported by the China Geological Survey (Grant Nos. DD20230229, DD20160083, DD20190011, DD20221643-5), the National Key Research and Development Program of China (the DREAM—Deep Resource Exploration and Advanced Mining; Grant No. 2018YFC0603701), and the Cooperative Project between the Chinese Academy of Geological Sciences and the Sinopec Shengli Oilfield Company (Grant No. P22065). We would like to express our heartfelt thanks to the North China Branch of Sinopec Petroleum Engineering Geophysics Co., Ltd. for their assistance in the acquisition and routine processing of the deep seismic reflection profile data (NQL-2016), the Beijing Patson Technology Co., Ltd. for their special processing of the seismic data, the Integrated Geophysical and Geochemical Exploration Department of Eastern Geophysical Company for their collection and processing of the MT data (QLAL-2017MT.

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    The North Qilian Shan fold and thrust belt, located at the northern Tibetan Plateau and southern margin of the Hexi Corridor, is a key tectonic unit to decode the formation and expansion of the plateau. Previous studies emphasize the Cenozoic deformation due to the far-field response to the Indo–Asian collision, but the Mesozoic deformations are poorly constrained in this area. We conducted detailed field mapping, structural analysis, geochronology, and structural interpretation of deep seismic reflectional profiling and magnetotelluric (MT) sounding, to address the superposed results of the Mesozoic and Cenozoic deformation. The results recognized the North Qilian thrust and nappe system (NQTS), the root and the frontal belt are the North Qilian thrust (NQT), and the Yumu Shan klippe (YK),

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HAN Lele, DING Weicui, CHEN Xuanhua, SHAO Zhaogang, ZHANG Da, XIAO Yongjun, HE Chengguang, WANG Zengzhen, LI Bing, ZHANG Yiping, XU Shenglin, WANG Ye.2023. Early Cretaceous Thrust and Nappe Tectonics in North Qilian Shan, Northern Tibetan Plateau: Evidence from Field Mapping, Geochronology, and Deep Structural Analysis[J]. ACTA GEOLOGICA SINICA(English edition),97(4):1058~1077

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  • 收稿日期:2022-11-20
  • 最后修改日期:2023-03-16
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  • 在线发布日期: 2023-08-17
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