新生代天山隆升与塔里木盆地北缘现今构造面貌关系——来自岩石声发射的证据

对塔里木盆地北缘四石厂剖面和库车河剖面进行声发射样品采集,并对志留系、二叠系、三叠系岩石样品进行岩石声发射地应力测试,以研究强烈构造活动下塔里木盆地北缘（柯坪隆起和库车坳陷）的地应力特征。测试结果显示,志留系、二叠系、三叠系样品所记录的岩石声发射最大主应力分别为57.74 MPa、57.73 MPa、58.86 MPa。结合前人对地应力的研究成果,认为在塔里木盆地北缘喜马拉雅期构造运动能够被岩石记载的应力约为57 MPa左右。塔里木盆地北缘自志留纪至今的地质历史过程中喜马拉雅晚期遭受的构造运动最为强烈,造成塔北地区现今的构造面貌。这与新生代天山隆升有密切关系,印度板块与欧亚板块碰撞是其最主要的动力学因素。

RELATIONSHIP BETWEEN CENOZOIC TIANSHAN MOUNTAIN UPLIFTING AND CURRENT TECTONIC TOPOGRAPHY IN NORTH MARGIN OF TARIM BASIN: AN EVIDENCE FORM ROCK ACOUSTIC EMISSION

Strongly tectonic activity had been observed by field outcrop in the northern margin of the Tarim Basin.In order to find out regional stress field setting of active structure movement,the authors collected rock acoustic emission samples in Sishichang and Kuqa River section in the north margin of the Tarim Basin,and then experiment with Silurian,Triassic,Permian samples,rock ground stress test of acoustic emission.The recorded results of the maximum principal stress were 57.74 MPa,57.73 MPa and 58.86 MPa respectively.Summarized previous research results of study area,the rocks recorded the ground stress of the Himalayan movement about 57 MPa,in the northern margin of the Tarim Basin.Late Himalayan period had been suffered intensively,during the geology history stage of the northern margin,since Silurian period.Today’s tectonic features were formed.It is intimately relation to Cenozoic Tianshan Mountain uplifting;the main kinetic factor is Eurasian plate and India plate collision.