印尼桑加卢比铅锌矿区电磁异常特征及找矿方向  

Electromagnetic anomaly characteristics and prospecting orientation in the Sangkaropi ore district,Indonisia

作　　者：陈靖[1,2,3,4] 王万银[1,2,3] 温少光 郭文波 雷小鹏 魏晓航 

机构地区：[1]长安大学重磁方法技术研究所,陕西西安710054 [2]长安大学地质工程与测绘学院,陕西西安710054 [3]长安大学西部矿产资源与地质工程教育部重点实验室,陕西西安710054 [4]西北有色地质勘查局物化探总队,陕西西安710068 [5]桂林凯山矿业技术有限公司,广西桂林541000

出　　处：《物探与化探》2015年第6期1305-1311,共7页Geophysical and Geochemical Exploration

基　　金：中央高校基本科研业务费专项基金(2014G3262010);长安大学基础研究支持计划专项基金;西北有色地质勘查局海外项目

摘　　要：印度尼西亚桑加卢比铅锌矿位于南苏拉威西省,属于环太平洋火山岛弧,是近年来发现的以铅锌为主兼有铜银金等大型多金属优质矿床。以自然电位和激发极化法面积测量筛选浅表异常,以瞬变电磁法剖面测量对重点矿致异常的矿体产状和分布特征进行评价。矿区的自然电位异常和激发极化法异常主要分布在比罗罗、卢满戈和满德拉三处,异常整体呈条带状延伸,据此推测这些电法异常为隐伏的北西向缓倾板状矿体所致。同时,将该矿与日本黑矿型矿床进行对比,总结二者的相似性和差异性,提出桑加卢比铅锌矿既有黑矿型矿床的特点,又具备典型的线性构造矿化的特征,是黑矿型与构造控矿型相结合的综合型矿床。从电法异常特征、黑矿型矿床特征及构造特征三方面提出找矿建议,为该地区及周边地区同类型矿床找矿工作提供借鉴。The Sangkaropi ore district in South Sulawesi Province of Indonesia lies on the circum-Pacific volcanic island arc.It is one of the largest and high quality polymetallic deposits discovered in recent years,with mainly lead-zinc and occasionally copper-silver-gold resources.Firstly,the authors used spontaneous potential（ SP） and induced polarization（ IP） method to sieve superficial anomalies,and employed the transient electromagnetic section to evaluate the attitude and distribution of ore-related anomalies. The conclusion is that the major SP and IP anomalies lie at Bilolo,Rumanga and Medila and might be caused by concealed NW-trending gently-oblique tabular orebodies.Secondly,the authors compared the Sangkaropi deposit and the Kuroko-type deposit in Japan,and reached the conclusion that the Sangkaropi ore deposit was caused by Kuroko-type mineralization and geological structure,and hence has the characteristics of both Kuroko-type deposit and linear mineralization.Finally,the authors made a suggestion for prospecting on the basis of geophysical anomaly,Kuroko-type deposit characteristics and geological structure.The results obtained by the authors are helpful in the search for similar deposits in peripheral areas.

关 键 词：桑加卢比铅锌矿 自然电位法 激发极化法 瞬变电磁法 黑矿型矿床 

分 类 号：P631[天文地球—地质矿产勘探]