近南北向构造在塔里木盆地的踪迹  

The Traces of Nearly North-South Structures in Tarim Basin

作　　者：刘德良[1] 李振生[1] 吴小奇[1] 陶士振[2] 

机构地区：[1]中国科学技术大学地球与空间科学学院,合肥230026 [2]中国石油勘探开发研究院,北京100083

出　　处：《地质学报》2007年第3期324-331,共8页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号40472074);国家重点基础研究规划(编号2001CB209133)资助的成果。

摘　　要：为厘清近南北向构造在塔里木盆地中的性质、地位和作用,笔者通过地质—地球物理分析,确认了以反转断层及相关褶皱为主导的挤压型构造是塔里木近南北向构造的主要表现形式。它发生发展于大陆内部,具有分布的广泛性和等距性、延伸的线性和断续性、纵深的陡倾性和穿透性、主断面的逆冲等特征。它的发育通常是基于先存的NS(—NNE)向张裂带和NNW(—NW)或NNE(—NE)向剪裂带,前者多演化为大、中型南北向构造,而后者多演化为中、小型南北向构造。近南北向构造的反转断层呈现为伸展—走滑—挤缩的演化顺序;最终定型于新生代;其驱动力主要源于太平洋—菲律宾板块向西的推挤动力。近南北向反转构造是种复合型的封闭性构造,对于石油和天然气地质研究,具有实际意义。The character, status, and function of nearly north-south（NS） structures in Tarim basin was discussed in this paper. It was suggested that the major form of nearly NS structures in Tarim basin was reversal fault as well as related folds by geological and geophysical analyses. The linear, discontinuous, high-angle and penetrating NS structures with compresso-shear structural planes are universal and equidistant in Tarim basin. Their development usually succeeded the NS（-NNE） extension faults and NNW（-NW） or NNE（-NE） shear faults, and the former evolved finally into large and medium NS structures while the latter into medium and small ones. The evolvement sequence of reversal fault for nearly NS structures is extension-strike slipcompression. The latest NS structures were formed in Cenozoic era, which were thought to be a response to westward subduction of Pacific-Philippine plate. The intracontinental reversal structure, which is one of composite sealing structures, should be favorable to research of oil and gas geology.

关 键 词：近南北向构造 反转构造 横跨构造 塔里木盆地 太平洋板块 

分 类 号：P548[天文地球—构造地质学]