甚低频电磁法对脉状矿床勘查评价的意义——以金、铅锌(银)和萤石矿为例  

Feasibility of Applying VLF-EM Methods to Exploration and Evaluation of Vein Deposits: Exemplified by Exploration of Gold, Lead-Zinc (Silver) and Fluorite Deposits

作　　者：白大明[1] 聂凤军[1] 江思宏[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037

出　　处：《矿床地质》2002年第4期408-413,共6页Mineral Deposits

基　　金：国家地质调查项目 (编号 :K1.3 .3 2 )的资助

摘　　要：脉状矿床是重要的矿床类型之一 ,其矿体往往赋存于断裂构造之中。甚低频电磁法 (VLF_EM )以其成本低廉、轻便高效 ,以及对脉状矿 (化 )体特有的灵敏性而具有特色。文章通过对以脉状形式产出的金、铅锌 (银 )及萤石矿的VLF_EM找矿勘查实例 ,探讨了VLF_EM对这类矿床勘查的有效性和优越性 。The deposit described in this paper is one of the most important types of ore deposit. In general, the spatial distribution of the ore veins in this deposit is controlled by fracture zones. Geophysical investigation indicates that the VLF_EM methods are suitable for exploration of this type of ore deposits in that they can be used precisely, conveniently and economically during the regional evaluation of the vein ore deposits, especially in the areas covered with overburden. The principles and application procedures of the VLF_EM methods have been described in detail in this paper. Meanwhile, Cases are given concerning the successful exploration of gold_ and lead_zinc_silver_bearing veins as well as fluorite veins distributed in Inner Mongolia and Yunnan. In addition, all the geophysical anomalies delineated by the VLF_EM methods have been proved to be valuable. The exploration model derived from the VLF_EM methods is also advanced.

关 键 词：固体地球物理学 甚低频电磁法 找矿方法 脉状矿床 金矿床 铅锌矿床 萤石矿床 银矿床 

分 类 号：P618.5[天文地球—矿床学] P618.[天文地球—地质学]