阿尔金断裂系的组成及相关中新生代含油气盆地的成因特征

THE CONSTITUENTS OF THE ALTUN FAULT SYSTEM AND GENETIC CHARACTERISTICS OF RELATED MESO CENOZOIC PETROLEUM BEARING BASIN

阿尔金构造带是多次俯冲—碰撞而形成的塔里木板块东南边缘，构造带内的走滑活动始于奥陶纪中晚期，中新生代强烈活动，并将北部不同构造单元的一些地质体拖曳到断裂带中，形成北山与敦煌构造楔。北山—阿拉善及断裂两侧的其他地质体受到走滑拉分作用的强烈改造，形成许多中新生代含油气盆地，共同构成我国中西部一条巨型走滑断裂系。

The Altun tectonic zone lies on the southeastern margin of the Tarim plate resulting from multiple subductions and collisions. The strike slip activity in the zone began in the Middle Late Ordovician and became strong in the Mesozoic and Cenozoic. It draged some geological bodies of different tectonic units to the north into the zone, forming the Beishan Dunhuang tectonic wedge. The Beishan Alashan and other geological bodies on two sides of the zone were modified strongly by strike slip and pull apart activities, forming a lot of petroleum bearing basins. They combine to form a gigantic strike slip fault system in west central China.