利用磁测方法确定水下磁性目标体的深度  

Methods for calculating buried depth of magnetic object under water

作　　者：张小凌[1] 刘国明 李海侠[1] 余海龙[3] 

机构地区：[1]昆明理工大学,昆明650093 [2]万宝矿产有限公司,北京100053 [3]中国地质调查局发展研究中心,北京100037

出　　处：《工程勘察》2013年第12期74-77,共4页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金青年基金项目(41104085);昆明理工大学人才科研启动基金(14118240)

摘　　要：水下磁性目标物的线度一般远小于探测距离,其产生的场可以近似为磁偶极子产生的场,本文研究适用于估算磁偶极子深度的特征点法和切线法,给出了近似计算公式,并且编制了可视化应用软件。利用这两种方法对某海域的磁测资料进行了反演计算,结果表明:这两种方法确定水下磁性目标体的深度能够取得较好效果。The length of magnetic object under water is far smaller than the prospecting distance, so its field can be approximated to the field of the magnetic dipole. The characteristic point method and the tangent method for calculating buried depth of magnetic dipole are studied. The approximate calculation formulas are given, and the visualization application software is designed. The two methods are applied to a set of marine magnetic data for the back calculating, and the results show that using the two methods to determine the depth of magnetic objects under water can achieve the better effect.

关 键 词：水下磁性目标体 特征点法 切线法 深度 磁偶极子 

分 类 号：P631[天文地球—地质矿产勘探]