塔中地区走滑断裂体系的发现及其地质意义  

Discovery of strike-slip fault system in Tazhong area and geologic meaning

作　　者：李明杰[1] 胡少华[1] 王庆果 李秀珍 陈冀 

机构地区：[1]中国地质大学 [2]东方地球物理公司

出　　处：《石油地球物理勘探》2006年第1期116-121,共6页Oil Geophysical Prospecting

摘　　要：依据2003年获得的高质量三维地震资料,在塔里木盆地塔中地区首次发现了具一定规模的NE向的走滑断裂体系。走滑断裂体系由东西两条主断裂和其间的菱形拉分地堑以及发育在主断裂尾端的羽列张扭断层组成。走滑断裂广泛发育,对碳酸盐岩储层改造、火山活动及圈闭形成具有一定的控制作用。这一发现改变了对塔中地区构造特征的单一认识,启发了对塔里木盆地中晚奥陶世构造背景的新认识。文中认为这种走滑断裂体系主要是在晚加里东期张扭应力环境下形成的,其发育时期与塔里木盆地油气成藏期基本匹配,这组断裂很可能是一组重要的油气通道。A certain size of NE directional strike-slip fault system was first discovered in Tazhong area of Tarim basin according to 3-D high-quality seismic data acquired in 2003. The strike-slip fault system consists of two main faults and diamond graben between two faults as well as furthering tenso-shear fault developed at the end of main faults. Strike-slip faults widely developed and had certain control role on reform of carbonate reservoir, volcanic action and formation of traps. This discovery changed the sole knowledge of structural feature in Tazhong area and aroused new knowledge of Middle-Late Ordovician structural anticlines background in Tarim basin. The paper considered that the strike-slip fault system was formed under the environment of Late Caledonian tensio-shear press, the development period basically matched to oil/gas-forming period of Tarim basin and this group of faults maybe is a group of important oil/gas pathway.

关 键 词：塔里木盆地 塔中地区 走滑断裂体系 拉分地堑 断裂 

分 类 号：P618.130.2[天文地球—矿床学] P542.3[天文地球—地质学]