江西浒坑钨矿大脉区段深部蚀变花岗岩型钨矿地质特征及找矿建议

Geological Characteristics and Suggestions for Further Prospecting of Altered Granite Type Tungsten Deposits in the Deep of Big Vein Belt of Hukeng Tungsten Deposit in Jiangxi Province

江西省安福县浒坑钨矿是一座开采了70年的老矿山,矿床类型主要为石英大脉型钨矿床。2007—2013年矿山开展危机矿山接替资源勘查及地质详查发现大脉区段深部存在一种新的矿床类型——石英细脉带型钨矿床。经过2021—2023年开展矿山深边部勘查,对石英细脉带型钨矿进行分析研究,认为其属于岩体顶部的蚀变花岗岩型钨矿床。矿体产状基本平行于花岗岩和外接触带的界线,呈缓倾状,倾向南西,矿体厚度大,品位低。浒坑钨矿床具有“上脉下体”特点,找矿模型与赣南“五层楼+地下室”模型基本一致。在综合分析矿床地质特征及成矿模式基础上,明确下步勘查重点应放在浒坑岩体南西向内接触带。

The Hukeng tungsten mine in Anfu County,Jiangxi Province has been mined for 70 years.The main type of deposit is the quartz big vein-type tungsten deposit.From 2007 to 2013,a crisis mining replacement resource exploration and geological detailed investigation were carried out in the mine,and a new type of deposit-quartz fine vein-type tungsten deposit was discovered in the deep part of the main vein section.After conducting deep edge exploration of the mine from 2021 to 2023,the“quartz fine vein-type tungsten deposit”was analyzed and studied,and it is believed to belong to the altered granite type tungsten deposit at the top of the rock mass.The occurrence of the ore body is basically parallel to the boundary between the granite and the outer contact zone,showing a gently dipping shape,leaning towards the southwest.The thickness of the ore body is large,the grade is low,and it has the characteristics of a“porphyry type”tungsten deposit.The Hukeng tungsten deposit has the characteristics of“upper vein and lower body”,and the prospecting model is basically consistent with the“five story building+basement”model in southern Jiangxi.Based on a comprehensive analysis of the geological characteristics and mineralization model of the deposit,it is pointed out that the next exploration focus should be on the southwest inward contact zone of the Hukeng rock mass.