重震联合解释技术在新疆罗布泊罗北凹地西部的应用  

Application of joint interpretation of gravity and seismic in west Luobei depression of Lop Nur

作　　者：明圆圆[1] 李秋辰 牛雪[1] 谢兴隆[1] 郭淑君[1] MING Yuan-yuan;SUN Sheng;NIU Xue;LI Qiu-chen;XIE Xing-long(Center for Hydrogeology and Environmental Geology Survey,CGS,Baoding Hebei 710065,China)

机构地区：[1]中国地质调查局水文地质环境地质调查中心,保定071051

出　　处：《华北地质》2021年第1期52-55,共4页North China Geology

基　　金：中国地质调查局项目“雄安新区深部三维地质结构探测(DD20189630)”。

摘　　要：对库鲁克塔格山前隐伏断陷盆地进行了1/5万的区域重力勘探和5500 m长的地震剖面测量。抽取与地震同测线的重力剖面,通过重力资料反演得出该断陷盆地第四系最大埋深在1800 m以上,扩大了寻找钾盐的深度范围;采用Oasis Montaj平台下的重磁模拟解释系统GM-SYS,参考地震资料建立反演初始模型,利用地质资料及LDK01井测得的岩性参数作为约束条件进行重震联合反演解释。对罗北凹地西部第四系地层、基底及断裂有了进一步的认识,减少了重力反演深层构造界面的多解性,为罗布泊深部钾盐资源勘探供了新的参考。The 1/50000 regional gravity exploration and 5500 m long seismic profile survey have been carried out in the Kuruktag Piedmont buried fault basin.The maximum buried depth of Quaternary System in the fault basin is more than 1800 m by gravity data inversion,which expands the depth range of looking for potash.The gravity and magnetic simulation interpretation GM-SYS system under Oasis Montaj platform is used to establish the initial inversion model with reference to seismic data.The geological data and LDK01 are used to establish the initial inversion model.The lithologic parameters measured by the well are used as constraint conditions for the joint inversion interpretation of gravity and earthquake.Further understanding of the Quaternary strata,basement and faults in the west of Luobei depression reduces the multi solution of deep structural interface in gravity inversion,which provides a new reference for the exploration of deep potash resources in Lop Nur.

关 键 词：重震联合反演 地层结构 罗布泊 钾盐 

分 类 号：P631.443[天文地球—地质矿产勘探]