基于多种位场数据及3D反演结果的综合解释方法  

The Comprehensive Interpretation Based on Multiple Potential Field Data and the Results of 3D Inversion of Gravity Fata

作　　者：田维 刘银萍[2] 

机构地区：[1]山西省煤炭地质114勘查院,长治046011 [2]吉林大学地球探测科学与技术学院,长春130026

出　　处：《科学技术与工程》2013年第31期9168-9176,共9页Science Technology and Engineering

摘　　要：近期位场梯度数据在勘探地球物理观测数据解释中的作用日益增加。随着计算机等硬件设施的进步,处理大型数据能力的增强,重力数据3D反演方法也越来越多的应用到重力数据解释工作中。提出结合重力数据、梯度数据及重力数据3D反演结果的综合解释方法,并将此解释方法应用到虎林盆地观测数据、梯度数据及3D反演结果的综合解释工作中。首先讨论单个棱柱体的重力数据、梯度数据的计算方法以及重力数据3D反演方法;然后,编制了Matlab程序计算重力数据、梯度张量数据并处理重力数据的3D反演;最后,根据计算的数据详细讨论了梯度九分量之间的关系及重力数据反演结果的数值特征,提出结合梯度九分量数据及重力数据3D反演方法联合解释方法。模型试算及解释结果表明重力梯度数据对进一步提高勘探地球物理观测数据的解释精度及确定埋深较浅的异常源位置及水平尺寸等信息起到重要的作用;将其与重力数据3D反演方法联合解释可更准确的刻画异常源的分布特征。最后经过此综合解释方法将虎林盆地划分为8个构造单元。The field gravity gradient data（GGD） is more and more important in the interpretation of exploration geophysical observations. With the improvement of computer and hardware facilities to deal with large data capaci- ty, 3D inversion of gravity data is also more and more applied to the interpretation of the gravity data. A compre- hensive interpretation method combined with 3D inversion results, gradient data and gravity data is proposed which is applied to the interpretation of Hulin Basin observational data, the gradient data and 3 D inversion results. First- ly, the gravity data calculation of single prism, the gradient data and the 3D inversion of gravity data are discussed. Matlab program to calculate the gravity data, the gradient tensor data and 3D inversion of the data is made later. Finally, based on the calculated data, the numerical characteristics of the relationship between the gradient of nine components and gravity data inversion results are discussed in detail. The joint interpretation method is proposed combined with gradient nine-component data and 3D inversion of gravity data. Jointed with the former method and the 3D inversion result can distinguish the distribution characteristics of the abnormal source more accurately. Fi- nally, after the interpretation the Hulin Basin data, this basin is divided into eight tectonic units.

关 键 词：重力棱柱体模型 重力梯度数据 重力数据3D反演 位场数据综合解释 

分 类 号：P554[天文地球—构造地质学]