郯庐断裂带及其周缘中新生代盆地发育特征  

CHARACTERISTICS OF TANLU FAULT ZONE AND DEVELOPMENT OF MESOZOIC AND CENOZOIC BASINS ALONG IT

作　　者：胡望水[1,2] 吕炳全[1] 官大勇[3] 张文军[3] 冷军[4] 毛治国[3] 袁晓满[3] 

机构地区：[1]同济大学海洋地质与地球物理系 [2]江汉石油学院地球科学系荆州434023 [3]江汉石油学院地球科学系 [4]江汉油田分公司勘探开发研究院

出　　处：《海洋地质与第四纪地质》2003年第4期51-58,共8页Marine Geology & Quaternary Geology

基　　金：国家自然科学基金资助项目(49773198);中国石油天然气集团公司中青年创新基金项目

摘　　要：郯庐断裂带作为中国东部滨太平洋地区一条巨型走滑构造带,对其周缘中、新生代盆地的发育、演化起着重要的控制作用。随着太平洋板块俯冲方向从NNW向NW到NWW的变化,郯庐断裂带的活动方式逐步从中生代左行走滑—左行斜向滑动过渡到早第三纪以左行斜向—倾向滑动,晚第三纪—第四纪转为倾滑—右行斜向滑动—右行走滑。走滑活动经历了一个循序渐进的周期演变过程。随着郯庐断裂活动方式的演变,其周缘中、新生代盆地的发育逐渐向北迁移,其中南段周缘盆地主要为中生代盆地,中段周缘盆地主要为中、新生代叠加盆地,中北段周缘盆地主要为早第三纪盆地。每个盆地都经历了拉分(伸展)裂陷到挤压反转的演化过程。此外,在同一时期、同一区域剪切应力场作用下,不同区段因其走向变化导致局部应力场变化,在增压弯曲部位发生会聚、挤压、隆升;而释压拉张部位发生离散、伸展、沉降,从而盆地发育。Tan Lu fault zone is a great strikeslip structural zone along the Pacific in China,and controls the development and evolution of Mesozoic and Cenozoic basins along it. With the changes in directions of the Pacific plate subduction from NNW to NW and then to NWW,the Tan Lu fault zone motion gradually changed from leftlateral strike slip　and leftlateral oblique slip in Mesozoic to leftlateral obliquedip slip in Paleogene and then to dip slip,rightlateral oblique slip and rightlateral strike slip in Neogene and Quaternary.Due to the changes of the motions of Tan Lu fault zone, the development of basins in Mesozoic and Cenozoic gradually migrated from south to north.The Mesozoic basins are along the middlesouth segment of Tan Lu fault zone,the Mesozoic and Cenozoic basins are superimposed in the middle segment of Tan Lu fault zone,and the Paleogene basins are along the middlenorth segment of the fault zone. Each basin has the development evolution of pullapart to inversion. In the same shearing stress field at the same time, the change of the strike gave rise to a local stress change, as a result of that the forced bend saw convergence and uplift, and the pressurerelease extension bend underwent divergence and subsidence. The basin developed in the extension bend.

关 键 词：断裂 走滑运动 中、新生代盆地 郯庐断裂带 

分 类 号：P548[天文地球—构造地质学]