柴北缘大型基底断裂--马仙断裂的构造特征研究  

The large scale basement fault in northern Qaidam Basin:The study on structural characteristics of Maxian fault

作　　者：王亮[1,2] 肖安成[1,2] 杨树锋[1,2] 巩庆霖 周苏平[4] 沈中延[1,2] 吴磊[1,2] 楼谦谦[1,2] 

机构地区：[1]浙江大学地球科学系,浙江杭州310027 [2]教育部含油气盆地构造研究中心,浙江杭州310027 [3]中国石油集团东方地球物理公列研究院,河北涿州072750 [4]中国石油青海油田公司,甘肃敦煌736202

出　　处：《地质科学》2010年第1期157-166,共10页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家“十五”科技攻关项目(编号:2004BA616A-04-01);中国石油青海油田公司项目(编号:02-107401-7)资助

摘　　要：利用地面地质、地球物理和钻井资料,对位于柴达木盆地北缘的马仙断裂带的平面分布和剖面结构特征进行了分析,详细的研究了该断裂的形成、发育时间和运动学特征,在此基础上,提出了一个合理的断裂活动的运动学模型。研究认为马仙断裂形成于晚白垩世,在整个新生代期间长期活动,控制了断裂两侧的盆地结构、沉积分布和油气聚集,是一条断面南倾的具有左行走滑分量的斜向冲断层。马仙断裂的运动特征源于南祁连山对盆地的差异性推覆作用。According to the ground geological, geophysical and drilling data, characteristics of distributions and section structures of Maxian fauh belt in northern Qaidam Basin are analysed. Its formation and development time and kinematic characteristics are detailed researched. On the basis,a reasonable kinematics model of the active fault is proposed. The results are that Maxian fault is formed in Late Cretaceous,and has a long-term activity in Cenozoic,controlling basin structures, sedimentary distributions and oil and gas accumulations, The fault dips to south and is a left-lateral strike-slip thrusting fault. The kinematic characteristics of Maxian fault derive from the differential pushes of south Qilian Mountains to Qaidam Basin.

关 键 词：柴达木盆地 马仙断裂 运动学特征 左行斜向冲断 

分 类 号：P542[天文地球—构造地质学]