北衙金矿重磁场特征与综合找矿评价  

Gravity and magnetic field characteristics and comprehensive prospecting evaluation in Beiyagold mine

作　　者：杨剑[1,2] 王绪本[1] 曾琴琴[2] 王桥[2] 郭镜[2] 

机构地区：[1]成都理工大学地球物理学院,成都610059 [2]成都地质矿产研究所,成都610081

出　　处：《地球物理学进展》2014年第4期1856-1862,共7页Progress in Geophysics

基　　金：中国地质调查局项目(12120113094500);云南北衙整装勘查区金矿找矿模型与综合找矿方法研究资助

摘　　要：北衙金矿位于西南三江富碱斑岩成矿带区域,地质构造复杂,华里西期海相玄武岩和喜山期富碱斑岩极为发育;前者普遍具有热液型铜矿化,后者与金、铁、铅、锌、银等多金属矿床具有密切成因关系.为了预测区内多金属矿产分布情况,利用位场数据处理的延拓、化磁极、重磁对应分析等方法,对重磁资料进行了处理,综合分析了区内重力场、磁场、重磁对应分析中同源性的基本特征及其与岩矿石物性的分布关系,结合矿区内地质资料对矿区进行了综合找矿评价,划分了三个成矿远景区,并给出了远景区圈定的依据.The Beiyagold mine is located in the southwest of the Sanjiang alkali porphyry belt region with complex geological structure,Village West Marine basalt and Himalayan stage alkali-rich porphyry was well developed;the former generally with the hydrothermal mineralization,the latter has a close relationship with gold,iron,lead,zinc,silver.In order to forecast polymetallic distribution in this area,the authors employed such means as upward continuation,reduction to the pole and corresponding analysis of gravity and magnetic anomalies to process.Characteristics of gravity and magnetic fields,correlation coefficient of gravity and magnetic corresponding analysis and their relationship with the density and magnetic susceptibility of rocks and minerals were analyzed comprehensively.Combined with the regional geology data in this area,the authors delineated 3 ore-forming prospect areas,and analyzed the basis for delineation of prospect areas comprehensively.

关 键 词：北衙金矿 重磁场 找矿评价 

分 类 号：P631[天文地球—地质矿产勘探]