中国地质2016，Vol.43Issue(5)：1569-1578,10.DOI:10.12029/gc20160507
塔中隆起NNE向走滑断裂特征及形成机制
Deformation characteristics and formation mechanism of NNE-trending strike-slip faults in Tazhong Uplift
摘要
Abstract
In this study, the correlation method of structural factors and structural analysis were used to determine the formation mechanism of NNE-trending strike-slip faults in the Tazhong Uplift. The interpretation of 2D and 3D seismic data revealed deformation characteristics of the NNE-striking faults and determined their formation mechanism. NNE-trending strike-slip faults exhibit vertical superposition of compresso-shear faults and tenso-shear faults in seismic profiles. They have experienced two stages of activities:the late Ordovician compresso-shear faulting and the late Silurian-middle Devonian tenso-shear faulting. The formation of the NNE-trending strike-slip faults was controlled by the pre-existing basement weak zone and the evolution of the orogenic belts around Tarim plate. At the end of Middle Ordovician, a NS-trending compressive stress was generated by the subduction and closure of the ocean basin on the south margin of Tarim plate, and it acted on the NE-trending basement weak zone, resulting in the formation of NNE-trending strike-slip faults. Meanwhile, the compressive stress from the northwest margin of Tarim plate vertically acted on the NNE-striking strike-slip fault, leading to the compresso-shear deformation. In late Silurian-middle Devonian period, the NS-trending compressive stress continually acted on the strike-slip faults, resulting in continued strike-slip deformation. Moreover, the extensional stress from the northwest margin of Tarim plate vertically acted on the NNE-striking strike-slip fault, leading to the tenso-shar deformation.关键词
塔中隆起/断裂体系/走滑断裂/雁列式断层/形成机制Key words
Tazhong uplift/fault system/strike-slip fault/en-echelon faults/formation mechanism分类
天文与地球科学引用本文复制引用
杨勇,汤良杰,郭颖,谢大庆..塔中隆起NNE向走滑断裂特征及形成机制[J].中国地质,2016,43(5):1569-1578,10.基金项目
国家自然科学基金项目(4097209、41572105)和国家专项“深部探测与实验研究”(SinoProbe-08-01)联合资助。 （4097209、41572105）
