重磁3D反演在新疆伊吾县宝山铁矿找矿增储中的应用  

Application of Gravity and Magnetic 3D Inversion to Ore Search and Reserve Increase in the Baoshan Iron Deposit,Yiwu County,Xinjiang

作　　者：张明君[1] 严加永[2] 

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局第六地质大队,新疆哈密839000 [2]中国地质科学院矿产资源研究所、国土资源部成矿作用与资源评价重点实验室,北京100037

出　　处：《地质与勘探》2014年第1期156-161,共6页Geology and Exploration

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(K1217);自然科学基金项目(41104061);中国地质调查局地质矿产调查项目(1212011085024)

摘　　要：新疆伊吾县宝山铁矿是一个小型富磁铁矿矿床,经过多年开采其浅表矿体开采殆尽,成为危机矿山,找矿增储是延长矿山服务年限的当务之急。本研究在宝山铁矿床开展了超高密度的高精度磁法、重力面积测量,采用重磁三维反演技术,获得了矿区地下密度体和磁性体的三维分布信息。结合地质资料,对反演结果分析解释,认为宝山铁矿深部存在隐伏矿体,选择异常套合较好地段进行钻探验证,发现了隐伏的磁铁矿矿体。认为宝山铁矿深部还有较大的找矿空间,同时也证明重磁三维反演在隐伏矿找矿中具有十分广阔的前景。The Baoshan iron deposit in Yiwu county of Xinjiang is a small-scale but high-grade magnetite mine. This deposit becomes a crisis mine af- ter more than 10 years＇ mining for shallow ore bodies. Therefore, expandlng reserves has become an urgent problem for prolonging service life of the Baos- han iron deposit. In this study, we conduct high-precision magnetic survey and gravity survey and obtain three-dimensional distribution information of den- sity and magnetic bodies in the subsurface by 3D gravity and magnetic inversion. Combined with geological information, we analyze and interpret the in- version results, and infer that there are concealed ore bodies in the deep part of the Baoshan iron deposit. We choose targets which have geophysical anom- alies and verify them by drilling, and find hidden magnetite ores. Through this research, we consider there are still a large potential of the deep prospec- ting in the Baoshan iron deposit, and that 3D inversion of gravity and magnetic have broad prospects in prospecting of concealed deposits.

关 键 词：宝山铁矿 重磁三维反演 找矿增储 

分 类 号：P631[天文地球—地质矿产勘探]