二维地震构造地质特征及成矿条件分析  

Ordos Jungar Coalfield Xiheidai Two Dimensional Seismic Structure of Analysis of Geological Characteristics and Metallogenic Conditions

作　　者：李惠林 田家鹏 彭胜龙 李磊 郝静 张佳鑫 LI Huilin;TIAN Jiapeng;PENG Shenglong;LI Lei;HAO Jing;ZHANG Jiaxin(Inner Mongolia Autonomous Region Bureau of Coal Geology,Hohhot 010000,China;Scientific Research Institute of Coalfield Geology Bureau of Inner Mongolia Autonomous Region,Hohhot 010000,China)

机构地区：[1]内蒙古煤田地质局,呼和浩特010010 [2]内蒙古自治区煤田地质局科研所,呼和浩特010010

出　　处：《能源研究与管理》2022年第4期146-150,共5页Energy Research and Management

基　　金：煤田勘查区示范项目(1212011501601)。

摘　　要：鄂尔多斯盆地发育了较好的沉积地层,在沉积地层中孕育了多种矿产资源。准格尔煤田位于内蒙古西南部鄂尔多斯高原的东北边缘,为石炭、二叠纪全掩盖型煤田。采用二维地震、地质勘探等多种测试技术手段相配合的研究方法,充分发挥二维地震的技术优势,以查明深部煤层分布规律及区域构造地质特征。通过对准格尔煤田西黑岱二维地震工程测量,发现研究区挠曲构造北段和中段呈“膝折”及“挠曲”状特征展现,南段呈“膝折”状特征展现,总体呈“S”状展布。由地质勘探可知,区域内可采煤层为6号、9号煤层。对区域沉积地层进行成矿条件分析,太原组沉积旋回可分为3个沉积旋回,各沉积相成矿序列均为正旋回。说明研究区在成矿条件上,距阴山古陆较近,沉积环境具有“南临海,北靠陆”的古地理特征。依据二维地震构造地质特征,研究区构造形态简单,三角洲平原或分流间湾之上有利于泥炭沼泽化,有利于聚煤作用发生。The Ordos Basin has developed better sedimentary strata,in which many kinds of mineral resources are bred.Zhun Geer coalfield is located at the northeast edge of Ordos Plateau in the southwest of Inner Mongolia.It is a fully covered coalfield in Carboniferous and Permian.The research method of combining Two seismic,Geological exploration and other testing techniques is adopted to give full play to the technical advantages of Two seismic,so as to find out the distribution law of deep coal seams and regional structural characteristics.Through two seismic engineering survey of Xiheidai,Zhun Geer Coal Field,the north and middle sections of the flexure structure in the study area are characterized by"kinking"and"flexure",and the south section is characterized by"kinking",which is generally characterized by"S".According to the geological exploration,the minable coal seams in the area are 6 and 9 coal seams.Based on the metallogenic analysis of regional sedimentary strata,the sedimentary cycle of Taiyuan Formation can be divided into three sedimen-tary cycles,and the metallogenic sequence of each sedimentary facies is a positive cycle.It shows that the study area is close to Yinshan ancient land in terms of metallogenic conditions,and the sedimentary environment has the paleogeographic characteristics of"facing sea in the south and land in the north".According to the geological characteristics of two-dimensional seismic structure,the structural form of the study area is simple,and the delta plain or distributary bay is conducive to peat swamping and coal accumulation.

关 键 词：二维地震 构造地质 地震异常带 成矿条件 聚煤规律 沉积旋回 

分 类 号：P618.1[天文地球—矿床学]