黄骅坳陷中南部逆冲推覆构造特征及其形成背景分析  

Characteristics and Tectonic Setting of Thrust Nappe Structure in Central-Southern Huanghua Depression

作　　者：徐德英[1,2] 朱德献[2] 段秋梁 皮晓林[2] 净新苗[2] 

机构地区：[1]中国地质大学(武汉)资源学院,湖北省武汉市430074 [2]中国石油冀东油田公司,河北省唐山市063004 [3]北京金盈盛达科技有限公司,100195

出　　处：《中国石油勘探》2010年第4期15-18,30,共5页China Petroleum Exploration

摘　　要：通过分析黄骅坳陷内逆冲推覆构造特征及其分布特征,并与穿越沧县隆起、黄骅坳陷、埕宁隆起的大地电磁测深反演剖面进行对比研究,认为:黄骅坳陷内中南部的逆冲推覆构造具有分布广泛、类型多样、卷入地层集中、发育规模小,总体呈"薄皮"构造的特点。黄骅坳陷内部的这种逆冲推覆构造特征与大地电磁测深反演剖面所显示的坳陷两侧强烈相互对冲的构造格局存在着显著的差异,而这种差异的形成可能与沧东断裂、盐山—大洼断裂大规模的走滑作用调节有关。在逆冲推覆构造类型的分布上,西部以逆冲堆叠背形构造和逆冲叠瓦扇构造为主,而东部以高角度板状逆冲叠瓦构造为主。形成这种构造类型分布的主要动力来源可能与印支晚期—燕山早期扬子板块和华北板块间碰撞挤压作用所形成的南北向挤压应力场有关。The relationship between the characteristics and distribution of the thrust nappe structure in the central-southern Huanghua Depression and the thrust characteristics of the MT profile from Cangxian Uplift to Huanghua Depression to Chengning Uplift is studied and the conclusions are as follows:the thrust nappe structure in the central-southern Huanghua Depression features in wide distribution,only lower Paleozoic strata involved,diversity,and small scale,showing òthin-skinnedó structure while the profile of MT shows strong thrust in both Cangxian and Chengning Uplifts.The distinct discrepancy between the inner Huanghua Depression and the uplifts is attributed to adjustment of large scale strike-slip fault of Cangdong and Yanshan-Dawa Faults.For the distribution of thrust-nappe structure in central-southern Huanghua Depression,the thrust-stacked structure and thrust imbricate structure are mainly in the west while high-angle thrust-nappe structure is mainly in the east.The distribution pattern of the thrust-nappe structure may be related to compression stress between the Yangtze plate and the North China plate in late Indosinian and early Yanshanian.

关 键 词：黄骅坳陷 逆冲推覆构造 印支晚期-燕山早期 构造应力场 

分 类 号：TE111.2[石油与天然气工程—油气勘探]