重磁电震联合反演在合肥盆地勘探中的应用

合肥盆地地质构造复杂,多年勘探未果。通过对重磁电资料的目标处理,建立了全区地球物理场特征。应用重磁电震物探资料联合反演,绘制了印支面和结晶基底构造图,发现了"影子盆地"。认为盆地南北分区,众凹环隆,自南而北可划分为北淮阳前陆冲断带、舒城前渊沉降带、六安前隆断褶带和肥北隆后斜坡带,后三个构造带具有良好的勘探前景。

The application of the gravity-magnetic-electric seismic joint inversion in Hefei basin

The many years' exploration operated in He Fei basin did not produce results because of the complex geologicstructure. The geologic field feature of the region have been set up by producing the gravitational, magnetic, magne-totellusic data for the target. The structural maps of Sino-India surface and crystalline basement have been completedby using the joint inversion of the gravitational magnetic, magnetotellusic and seismic data, and a "shadow basin"found. The whole region is divided into four belts from south to north, showing "uplifts surrounded by sags". They areBei Huai Yang foreland thrust belt, Shu Cheng frontal subsiding belt, Liu An fore uplift bruchfalten zone and Fei Beiuplift sloping belt. We believe that the later three structures have good potential prospect.