大地电磁测深在潍坊滨海区划分断裂和构造单元中的应用

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英文篇名：Application of magnetotelluric about the fracture and tectonic units in littoral region, Wei Fang 作者：高伊航 ; 沈军辉 ; 苏永军 ; 匡海阳 英文作者：GAO Yihang;SHEN Junhui;SU Yongjun;KUANG Haiyang;College of Environment and Civil Engineering,Chengdu University of Technology;Tianjin Center of geological Survey,CGS; 关键词：大地电磁测深 ; 莱州湾 ; 断裂构造 ; 三维反演 ; 构造单元 英文关键词：magnetotelluric;;Laizhou bay;;fault;;3-D inversion;;tectonic unit 中文刊名：物探化探计算技术 英文刊名：Computing Techniques for Geophysical and Geochemical Exploration 机构：成都理工大学环境与土木工程学院;中国地质调查局天津地质调查中心; 出版日期：2019-01-15 出版单位：物探化探计算技术 年：2019 期：01 语种：中文; 页：106-111 页数：6 CN：51-1242/P ISSN：1001-1749 分类号：P631.325

摘要

研究区位于莱州湾南畔,为查明该区域的地质构造,采用大地电磁测深等探测方法在该区进行勘探。通过对大地电磁勘探剖面视电阻率断面图和三维反演结果的分析研究,结合该区的地质、钻探和物性特征,对该区的隐伏断裂构造进行了推断解释,划分出9条隐伏断裂。同时对研究区内两个Ⅳ级构造单元进行重新厘定,划分出五个Ⅴ级构造单元。从不同方向,不同深度三维反演切片图中能较为直观获得断裂空间展布情况、构造单元的形态、地质体电性特征等信息,为地质解释提供参考依据。
        The study area is located in the south side of Laizhou bay. To explore the regional geological structure, the magnetotelluric was used in the study area. Through the analysis of apparent resistivity profile and 3-D inversion results, combining with geologic, drilling and physical property of the area, the regional buried faults were inferred and explained and divided into 9 faults. And accurately revised two IV-level structural unites and five V-level structural units. From the different direction and depth of 3-D inversion section figure can get the fracture space distribution, the shape of the tectonic units and the electrical characteristics. These results provided reference for geological interpretation.

引文

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