一种实测重力异常区域场的消除方法  

A way of eliminating the regional field of measured gravity anomalies

作　　者：王正科 卢琳 刘花婷 WANG Zheng-Ke;LU Lin;LIU Hua-Ting(The No.2 Comprehensive Geophysical Prospecting Brigade Shaanxi Geological Mining Co.,Ltd.,Xi'an 710016,China)

机构地区：[1]陕西地矿第二综合物探大队有限公司,陕西西安710016

出　　处：《物探与化探》2021年第6期1569-1577,共9页Geophysical and Geochemical Exploration

基　　金：中国地质调查局项目“西藏1∶25万措勤区、措麦区幅区域重力调查”(1212011087026);“西藏1∶25万班戈县幅、那曲县幅区域重力调查”(1212011121302);“青海省都兰县察汗乌苏河地区1∶5万重力测量”(121201011000150005-17-1)。

摘　　要：实测重力异常是区域场和局部场合成的叠加场,具有形态复杂且幅值变化多样的特征。为更好地完成地质任务,需要分离区域场和局部场。本文从所获取的实测重力异常出发,分别研究自空重力异常、简单布格重力异常、布格重力异常与高程之间的关系,用数理统计方法进行回归分析,进行区域场(背景场)与局部场(剩余场)的分离,提高重力资料解释成果的可信度,为分析和解决地质任务提供基础服务。The measured gravity anomaly is a superimposed field composed of a regional field and a local field,whose characteristics is complex shape and various amplitude changes.In order to complete the geological task better,it is necessary to separate the regional field and the local field.Based on the the measured gravity anomalies,this paper studies the relationship separately between the elevation and free-air gravity anomaly,simple bouguer gravity anomaly,bouguer gravity anomaly.By the way of mathematical statistics to perform regression analysis,the regional field(background field) and the local field(remaining field) are separated which improves the credibility of the interpretation results of gravity data and provides basic services for analyzing and solving geological tasks.

关 键 词：实测重力异常 回归分析 相关关系 区域场 局部场 

分 类 号：P631[天文地球—地质矿产勘探]