重、磁、电联合反演在银额盆地定量解释中的应用  

THE APPLICATION OF GRAVITY-MAGNETIC-MAGNETOTELLURIC JOINT INVERSION TO THE QUANTITATIVE INTERPRETATION OF YIN'E BASIN

作　　者：刘建利[1,2] 李西周 张泉 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]陕西省地质矿产勘查开发局物化探队,陕西西安710043

出　　处：《物探与化探》2013年第5期853-858,共6页Geophysical and Geochemical Exploration

基　　金：中国地质调查局项目(1212010733506)

摘　　要：依据大地电磁测深连续二维反演结果初步确定构造与地层,通过综合分析区内物性特征给定地层与岩石的物性参数,建立正演地质—地球物理初始模型,在地质、钻井、地震资料约束下进行重、磁、电联合反演,不断修改地质—地球物理模型和大地电磁测深连续二维反演结果,使重、磁正演数据和实测数据拟合度达到最佳。在银额盆地构造与地层解释中的应用结果表明,重、磁、电联合反演可以有效克服单方法解释的多解性,准确识别地质层位,大大提高定量解释的精度。According to the results of 2-D resistivity inversion of magnetotelluric sounding, geological structures and strata were prelimi- narily confirmed. By synthetic analysis of petrophysical characteristics, the authors established the petrophysical parameters of strata and rocks in the study area, established the initial model of geology-geophysics, carried out gravity-magnetic-magnetotelluric joint in- version under the restraint of geological, well log and seismic data, and constantly revised the model of geology-geophysics and the re- suits of 2-D resistivity inversion of magnetotelluric sounding, to make the gravity-magnetic measurement data fit in with the theoretical calculations. The results of interpretation of geological structures and strata in Yin~ basin show that the gravity-magnetic-magnetotelluric joint inversion can effectively overcome the multi-resolution of the single one, mor~ correctly identify strata, and greatly improve the ac- curacy of quantitative interpretation.

关 键 词：重 磁 电联合反演 银额盆地 构造与地层 定量解释 

分 类 号：P631[天文地球—地质矿产勘探]