Surface Processes Driving Intracontinental Basin Subsidence in the Context of India–Eurasia Collision:Evidence from Flexural Subsidence Modeling of the Cenozoic Southern Tarim Basin along the West Kunlun Foreland,NW Tibetan Plateau  

作　　者：HUANG Hao LIN Xiubin AN Kaixuan ZHANG Yuqing CHEN Hanlin CHENG Xiaogan LI Chunyang 

机构地区：[1]Key Laboratory of Geoscience Big Data and Deep Resources of Zhejiang Province,School of Earth Sciences,Zhejiang University,Hangzhou 310027,China [2]Research Center for Structures in Oil and Gas-Bearing Basins,Ministry of Education,Hangzhou 310027,China [3]Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China [4]Research Institute of Petroleum Exploration and Development,Sinopec Southwest Oil and Gas Company,Chengdu 610041,China

出　　处：《Acta Geologica Sinica(English Edition)》2023年第6期1778-1786,共9页地质学报（英文版）

基　　金：funded by the National Natural Science Foundation of China(Grant Nos.U22B6002,41972217 and 42002219);the Second Tibetan Plateau Scientific Expedition and Research of China(Grant No.2019QZKK0708)。

摘　　要：The India–Eurasia collision has produced a number of Cenozoic deep intracontinental basins,which bear important information for revealing the far-afield responses to the remote collision.Despite their significance,their subsiding mechanism remains the subject of debate,with end-member models attributing it to either orogenic or sedimentary load.In this study,we conduct flexural subsidence modeling with a two-dimensional finite elastic plate model on the Hotan-Mazatagh section along the southern Tarim Basin,which defines a key region in the foreland of the West Kunlun Orogen,along the NW margin of the Tibetan Plateau.The modeling results indicate that the orogenic load of West Kunlun triggers the southern Tarim Basin to subside by up to less than ~6 km,with its impact weakening towards the basin interiors until ~230 km north from the Karakax fault.The sedimentary load,consisting of Cenozoic strata,forces the basin to subside by ~2 to~7 km.In combination with the retreat of the proto-Paratethys Sea and the paleogeographic reorganization of the Tarim Basin,we propose that surface processes,in particular a shift from an exorheic to an endorheic drainage system associated with the consequent thick sedimentary load,played a decisive role in forming deep intracontinental basins in the context of the India-Eurasia collision.

关 键 词：flexural subsidence modeling India-Eurasia collision West Kunlun Tarim Basin Northwest Tibetan Plateau 

分 类 号：P542[天文地球—构造地质学]