地质学报2025，Vol.99Issue(5)：1576-1588,13.DOI:10.19762/j.cnki.dizhixuebao.2023458
帕米尔突刺东缘上新世走滑与冲断构造转换
Pliocene tectonic transformation from strike-slip to thrust along the eastern margin of Pamir Salient
摘要
Abstract
The structural characteristics and evolution history of the eastern margin of Pamir Salient are of great significance to reveal the basin-mountain coupling relationship between the Pamir-West Kunlun orogenic belt and the Tarim basin,and to guide the exploration of oil and gas resources and earthquake disaster prevention in this region.Based on the detailed surface mapping and structural analysis of seismic profiles across key locations,the tectonic framework of the basin-range junction zone in the eastern margin of the Pamir Salient is constrained.The mapping data,field photos,seismic profiles and other data presented in this paper reveal that a dextral strike-slip fault system outcrops in the eastern margin of the Pamir Salient,and a buried compressional thrust belt develops in the adjacent basin,including the Qipan structural wedge and the Qimugen structural wedge.The growth strata of the Qipan structural wedge is located in the lower section of the Pliocene Artux Formation,while the growth strata of the Qimugen structural wedge is located at the top of the Pliocene Artux Formation,indicating that the thrust belt has been developed since the Pliocene.The eastern margin of the Pamir Salient experienced a tectonic transformation from a strike-slip tectonic system to a compressional tectonic system during the Pliocene.Before the Pliocene,deformation was accommodated by dextral strike-slip of the Wuyitake-Momoke transfer system(WMTS).Since the Pliocene,deformation in this area was dominated by eastward thrusting,and the strike-slip activity decreased.关键词
帕米尔突刺/西昆仑造山带/塔里木盆地/右行走滑断裂系/冲断构造Key words
Pamir Salient/West Kunlun orogenic belt/Tarim basin/dextral transfer system/thrust structures引用本文复制引用
王哲,汪新..帕米尔突刺东缘上新世走滑与冲断构造转换[J].地质学报,2025,99(5):1576-1588,13.基金项目
本文为国家自然科学基金项目(编号41272230)和中国地质调查局项目(编号DD20221712,DD20240090,DD20242659)联合资助的成果. （编号41272230）
