彰武断陷结构构造及演化特征  

Tectonic Evolution Features in Zhangwu Fault Depression

作　　者：许叶妹[1] XU Yemei(Petroleum Exploration and Production Research Institute,Sinopec Jianghan Oilfield Company,Wuhan,Hubei,430223,China)

机构地区：[1]中国石化江汉油田分公司勘探开发研究院,湖北武汉430223

出　　处：《江汉石油职工大学学报》2021年第5期11-13,共3页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：松辽盆地南部发育多个中、新生代断陷盆地,彰武断陷为其区内的一个小型断陷。根据彰武断陷三维构造精细解释,剖析该区的结构构造及古地貌特征,认为彰武断陷总体为受北北东向断裂控制的多次洼箕状断陷,呈左旋右阶斜列特征;同时依据区域性角度不整合面、区内角度—平行不整合面及地层缺失情况,结合古地貌及断裂活动期次分析,认为该区在古生界基底之上的构造演化主要反映了早白垩世断陷期之特征。研究可为该区开展沉积充填及油气成藏研究提供构造地质依据。There are many mesozoic-Cenozoic fault basins in the southern Songliao Basin,in which Zhangwu fault depression is a small fault one.Based on the refined interpretation of the three-dimensional structure,the tectonic and palaeogeomorphic features of the Zhangwu fault depression are analyzed.It is considered that the Zhangwu fault depression is a multi-depression graben controlled by NNE trending faults,with the feature of sinistral rotation right-stepped echelon structure.At the same time,based on the regional angular unconformity,regional angle-parallel unconformity and stratigraphic gap(lacuna),combined with the periodic analysis of palaeogeomorphology and fault active periods,we believe that the tectonic evolution on the Paleozoic basement in this area mainly reflects the features of the early Cretaceous fault depression.The study can provide tectonic geological basis for the research on sedimentary filling and hydrocarbon accumulation in this area.

关 键 词：彰武 断陷 结构构造 构造演化 

分 类 号：P618[天文地球—矿床学]