张盆压岭型地洼盆地的基本特征及其大地构造演化─—对柴达木盆地北缘德令哈地洼的实例研究  

GEOTECTONIC RESEARCH ON THE DIWA BASIN OF TENSILE BASIN AND COMPRESSIVE MOUNTAIN TYPE IN THE NORTH BORDERLAND OF THE QAIDAM BASIN

作　　者：杨明慧[1] 

机构地区：[1]中国地质大学研究生院,武汉430074

出　　处：《大地构造与成矿学》1998年第3期198-208,共11页Geotectonica et Metallogenia

基　　金：青海石油管理局资助

摘　　要：据地球物理资料等分析，柴达木盆地是在挤压性构造体制中的局部伸展环境形成的拉张性地洼盆地。其南邻昆仑地洼造山带，北接南祁连地洼造山带，三者联合构成典型的张盆压岭型构造样式。柴北缘的德令哈地洼位于张一压接合地带，具有张盆压岭型盆地的沉积特点和构造样式。从大地构造角度研究张盆压岭型地洼盆地，可以：（1）揭示地台向地洼转化中的大地构造演化过程；（2）解释大陆动力学中的盆山构造耦合机制；（3）指示含油气盆地最为现实的勘探目标。According to geophysical data, the Qaidam basin is an extension type diwa basin located at an extended area in a total compressive environment. Its north borderland linked with the south Qilian orogen. The combination of the Qaidam extension basin and the south Qilian orogen constructed a classic diwa basin of tensile basin and compressive mountain type. The Delingha diwa basin located at the Qaidam basin,s north borderland is a tensile-compressive transfer zone. It had basin-fill sequences characteristic of the foreland basin, from the lower flysch basin association to the upper molasse basin association, and tectonic style of the diwa basin of the tensile basin and compressive mountain type, from the thrusting belt to the foreland basin. Study of the basin of tensile basin and compressive mountain type from a geotectonic angle may (1) disclose tectonic evolution process in the transformation from platform to diwa; (2) explore basin-mountain tectonic coupling mechanism in continental dynamics,and (3) find out the origin and distribution regularity of favorable hydrocarbon-bearing zones.

关 键 词：盆地 地洼盆地 大地构造演化 张盆压岭型 

分 类 号：P542.3[天文地球—构造地质学] P547[天文地球—地质学]