贵州东南部含金刚石钾镁煌斑岩找矿远景区预测  

Ore-search Prospecting Areas of Diamond-bearing Lamproite in Southeastern Guizhou Province

作　　者：王亮[1,2] 陶平[1,2] 

机构地区：[1]中国地质大学,湖北武汉430074 [2]贵州省地质调查院,贵州贵阳550004

出　　处：《地质与勘探》2012年第4期775-783,共9页Geology and Exploration

基　　金：贵州省优秀科技教育人才省长专项资金项目(黔省专合字【2009】70号);贵州省2010度公益性;基础性地质工作项目(项目序号5)资助

摘　　要：钾镁煌斑岩是金刚石的成矿母岩、组成岩筒的基本物质。基于区内区域重磁异常分布特征,以北部镇远马坪及周边县域(施秉、三穗、雷山、剑河、麻江)出露的钾镁煌斑岩和南部从江一带镶嵌的基性-超基性岩为线索及岩体露头上的重磁场异常特征响应值为标尺,与地表出现的金刚石原生矿、砂矿、指示矿物、重砂异常分布为依据,圈定了数个基性-超基性岩体(带),结合物探资料推断的岩浆岩带、火山机构、板块结合带、深大断裂带以及地质矿产资料,共划分了6个金刚石找矿远景区。预测在台江-剑河-锦屏-黎平一线,出现的1处大型重磁(航磁环状异常)正异常分布区为区内金刚石找矿的重要靶区和找到具有工业价值金刚石原生矿的重点突破口,这里(G3异常区)极有可能是破解贵州原生金刚石找矿瓶颈的福地,是揭示金刚石矿床赋矿岩筒神秘面纱的有利地段。Lamproite is the mother rock of diamond,and it is the basic substance for forming pipe.This work is based on the features of the regional gravitational and magnetic anomalies in the southeast of Guizhou Province,and the clues of exposed lamproite in Zhenyuan county and adjacent counties（Shibing,Sansui,Leishan,Jianhe and Majiang） and basic-ultrabasic rocks in the Congjiang area in the south.Combining the gravitational and magnetic responses of these exposed rocks with the original mineral of diamond,placer,indicator minerals,and heavy sand abnormity distribution on the surface,we delineate several basic-ultrabasic rock bodies.Integrated with the magmatite belt,volcano institution,plate conjunction belt,and deep fault zones derived from geophysical and geological data,this work determines 6 prospecting areas for searching diamond.It is inferred that in the Taijiang-Jianhe-Jinping-Liping areas,one large-scale gravitational and magnetic positive anomaly area should be regarded as a very important target area for diamond search and a key breakthrough spot for seeking original diamond mineral with industry values.And its anomaly area G3 is very likely the critical place to find original diamond mineral in Guizhou Province as well as the favorable section to remove the mystery veil of diamond deposits with pipes.

关 键 词：金刚石 钾镁煌斑岩 重磁异常 岩筒 找矿远景区 贵州东南部 

分 类 号：P631.2[天文地球—地质矿产勘探]