西天山地区岩矿石磁化率研究及应用  

Research and Application on the Magnetic Susceptibility of Rocks and Ores in West Tianshan Area

作　　者：范子梁[1] 张玄杰[1] 余学中[1] 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083

出　　处：《城市地质》2012年第3期41-46,共6页Urban Geology

摘　　要：航磁推断解释首先要研究岩矿石磁化率。西天山地区近年来野外实测500余处物性点,累计获得有效磁化率数据15000余个,数据统计分析结果表明,石炭系大哈拉军山组、伊什基里克组和二叠系乌郎组是区内最主要的磁性地层,部分海西期岩体磁性较强,而磁铁矿具有极高的磁化率值。根据这些磁化率特征,在西天山地区圈定磁性火山地层上百处,新圈定隐伏(半隐伏)岩体221处,推断铁矿磁异常109处,新发现铁矿(矿点)10余处。Magnetic susceptibility data play an important role in the process of interpreting aeromagnetic anomaly.In order to better apply the high precision aeromagnetic data of West Tianshan area,we got more over 500 points of magnetic susceptibility from field.This paper made a systematic arrangement and statistics of these data.The magnetism features of rocks and ores were researched in strata,lithology and ores.Base on the magnetic susceptibility data,we delineated hundreds of the magnetic stratum and identified concealed or semi-concealed 221 intrusive bodies.The detecting of iron-ore body is also base on the great difference of magnetic susceptibility.We found more than ten iron-ore bodies in West Tianshan area.The practical application indicated that magnetic susceptibility data are the important parameters in interpreting aeromagnetic anomaly and predicting the mineral.

关 键 词：西天山 高精度 航磁 磁化率 铁矿 

分 类 号：P631.2[天文地球—地质矿产勘探]