高校地质学报2026，Vol.32Issue(4)：488-500,13.DOI:10.16108/j.issn1006-7493.2025044
西昆仑柯克亚褶皱冲断带两期构造叠加的物理模拟
Analogue Modelling of Two-phase Tectonic Superposition in the Kekeya Fold-and-thrust Belt,West Kunlun Piedmont
摘要
Abstract
The Kekeya fold-and-thrust belt(Kekeya FTB)at the front of the West Kunlun Range underwent multiple phases of tectonic deformation and reworking during the Caledonian,Indosinian,and Himalayan periods.Unraveling the mechanisms of superimposed deformation in the southwestern Tarim Basin could provide crucial constraints for seismic interpretation and structural modeling.This study systematically investigates the two-phase superimposed deformation of the Kekeya FTB using analogue modeling.We designed experimental series with varying décollement configurations to evaluate the effects of tectonic superposition,décollement rheology,and Cenozoic syntectonic growth strata.The main conclusions are:(1)Syntectonic growth strata facilitate the propagation of deformation toward the foreland by inhibiting the surface breakthrough of deep-seated faults.This process enhances the decoupling effect of shallow décollements,allowing for more efficient strain transmission to the distal foreland;(2)Second-phase faults exhibit strong structural inheritance,preferentially reactivating pre-existing first-phase faults;(3)Comparisons between experimental results and geological cross-sections demonstrate that a coupled model involving a deep brittle and shallow ductile décollement under two-phase compression accurately reproduces the structural geometry of the Kekeya FTB.This deformation results in a stratified architecture comprising a deep basement imbricate fan system and a shallow passive-roof thin-skinned system.关键词
西昆仑山前/柯克亚冲断带/叠加变形/物理模拟/滑脱层Key words
West Kunlun piedmont/Kekeya FTB/superimposed deformation/analogue modeling/décollement分类
天文与地球科学引用本文复制引用
罗强,陈九洲,艾孜买提·米尔亥力木,钟城,刘畅,汪伟,李一泉,尹宏伟,贾东..西昆仑柯克亚褶皱冲断带两期构造叠加的物理模拟[J].高校地质学报,2026,32(4):488-500,13.基金项目
国家自然基金项目(41927802 （）
U22B6002 （）
42372264) （）
新型油气勘探开发国家科技重大专项课题(2025ZD1400505) （2025ZD1400505）
中国石油集团油气新能源公司科技专项课题(2023ZZ14YJ02) （2023ZZ14YJ02）
新疆维吾尔自治区科技创新团队项目(2024TSYCTD0008)联合资助 （2024TSYCTD0008）
