柴达木盆地北缘的右行走滑冲断系统及其动力学

肖安成; 杨树锋; 程晓敢; 党玉琪; 陈新领; 陈元忠; 王亮

doi:10.11743/ogg20060407

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柴达木盆地北缘的右行走滑冲断系统及其动力学
Right-lateral strike-slip thrust system and its dynamics along the northern margin of Qaidam basin
2006年27卷第4期页码：482-487
网络首发：2006-08-25，

纸质出版：2006
DOI： 10.11743/ogg20060407
稿件说明：

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肖安成, 杨树锋, 程晓敢, 等. 柴达木盆地北缘的右行走滑冲断系统及其动力学[J]. 石油与天然气地质, 2006,27(4):482-487. DOI： 10.11743/ogg20060407.

Xiao Ancheng, Yang Shufeng, Chen Xiaogan, et al. Right-lateral strike-slip thrust system and its dynamics along the northern margin of Qaidam basin[J]. 2006, 27(4): 482-487. DOI： 10.11743/ogg20060407.

摘要

通过对于断裂系统分析和地球物理资料的解释

证实了柴达木盆地北缘西段的主要构造形成时间为上新世以后

变形样式为一系列右行走滑冲断构造。走滑冲断构造带内部的断层在平面上呈分支复合

剖面上表现为正花状构造

断层上、下盘地层层序无法直接对比。右行走滑冲断构造形成于南祁连由北向南的斜向推覆作用

而主要应力来源于柴达木地块北缘由南向北的陆内俯冲作用。用一个运动学模型解释了柴北缘的右行走滑冲断作用机制。

Abstract

Interpretation of geophysical data and analysis of fault systems confirm that structures in the northern margin of Qaidam basin were formed after the Pliocene and occur as a series of right-lateral strike-slip thrusts.The faults within the strike-slip thrust belts occur as structure in sectional view

thus direct correlation of strata between the hanging wall and footwall is impossible. The formation of the right-lateral oblique thrust belts were controlled by the N-S oblique thrusting of South Qilian Orogeny and the main terrestrial stress came from the S-N intracontinental subduction of the north margin of Qaidam massive.To interpret the right-lateral strike-slip thrusting

a kinematics model is also provided.