江西钨矿床主要成因类型及找矿潜力分析

The main genetic types of tungsten deposits and prospecting potential of resources in Jiangxi Province

在江西省钨矿资源潜力评价工作的基础上,总结江西钨矿床的主要成因类型,主要有岩浆热液石英脉型、岩体型、斑岩型、矽卡岩型和云英岩型等钨矿床,分别论述各类型典型矿床的地质特征,分析各类型钨矿床找矿方向并预测其资源潜力。共圈定钨成矿远景区13处,运用含矿地质体体积法预测全省各类型钨矿资源潜力,分别为:岩浆热液石英脉型500万吨、岩体型200万吨、斑岩型约16万吨、矽卡岩型350万吨、云英岩型约50万吨。指出江西钨矿的找矿重点,一是赣北地区钨矿成矿规律研究,提出找矿模型;二是加强深部找矿理论研究,寻找隐伏矿床;三是深入其它类型钨矿(除石英脉型)研究,特别是最具找矿潜力的大湖塘式岩体——石英脉复合型钨矿和朱溪式矽卡岩型钨铜矿,可作为该区下一步找矿的主攻方向。

On the basis of the experience in evaluating work of tungsten resources potential in jiangxi Province, authors summarized the main tungsten genetic ty p e s, which include magmatic hydrothermal quartz-vein ty p e ,granite ty p e ,porphyry ty p e ,skarn type and greisen type. This study describes the geo-logical characteristics of various typical dep os i ts ,analyzes exploration s tra te g y , and predicts the resources potential. A total of 1 3 tungsten metallogenic prospect areas have been determined using volume method of Au-bearing geological masses to predict tungsten ore resource potential in jiangxi province. The resultsshow that the quartz-vein type deposits contain up to 5 million to n s , the granite type to 2 million to n s , the granite type about 160 thousand to n s ,the skarn type to 3. 5 million to n s , and the greisen type abomillion to n s. Key aspects of prospecting tungsten deposits in jiangxi should focus on （1） studying metallo-genic regularity of tungsten mineralization in north jiangxi and proposing metallogenic models; （2） strengthening study of deep ore-prospecting theory so as to explore hidden orebodies; and （3） deepening study of other tungsten-bearing deposit types （except quartz-vein type）, especially the most prospecting potential type deposits such as Dahutang-type rock-quartz vein type tungsten deposit and Zhuxi skarn-typetungsten and copper deposi t,which can be the key direction of future prospecting.