鲁西地块中、新生界裂缝发育特征及构造应力场分析  

Development characteristics of fractures in the Mesozoic and Cenozoic and structure stress field analysis of the Luxi block

作　　者：徐聪 李理[1] 符武才 Xu Cong;Li Li;Fu Wucai(School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《地质科学》2021年第3期829-844,共16页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家科技重大专项课题(编号:2017ZX05009001);国家自然科学基金项目(编号:41672193)资助。

摘　　要：鲁西地块是华北克拉通东部重要的构造单元,经历了多期构造演化,裂缝十分发育,是研究裂缝的有利场所。通过野外地质观测和室内研究,对鲁西地块部分地区的裂缝的产状、类型、开度、间距、填充物等参数进行了统计分析,得出裂缝优势方向主要为NNW向、SEE向、NEE向、NE向和NW向。在野外分期配套的基础上,结合区域构造应力场,用过滤法对鲁西地块中、新生界的裂缝进行了分期配套,初步分为NNW和SEE向,NNW和NEE向,NNW、NE、NWW和NEE向3期,并分别指示了早白垩世晚期至晚白垩世、古新世至始新世早期、始新世中期至渐新世区域构造应力场。The Luxi block is an important tectonic unit in the eastern part of the North China Craton.It has undergone multi-stage tectonic evolution,and fractures are very developed in Mezo-Cenozoic.It is a favorable place to study fractures.Through field survey and indoor statistical analysis,the statistical analysis of the occurrence,type,aperture,spacing,filling and other parameters of the fractures in parts of the Luxi block is carried out,the dominant orientation of fractures is NNW,SEE,NEE,NE and NW,with the X shaped pattern developed.Combined with fracture period and combination match in the field and the analysis of the regional structure stress field,the filtering method is used to stage the fractures developed in the Mesozoic and Cenozoic stratum of Luxi block,which is divided into three stages and indicated the regional structure stress field in period of the Late of Early Cretaceous-Late Cretaceous,Paleocene-Early Eocene,and Middle of Eocene-Oligocene,respectively.

关 键 词：构造裂缝 演化 构造应力场 中、新生界 鲁西地块 

分 类 号：P542[天文地球—构造地质学]