河南新县浒湾钨矿矿床地质特征及成因

Geological Characteristics and Genesis of Huwan Tungsten Deposit in Xinxian County,Henan Province

河南省新县浒湾钨矿位于大别山北麓,秦岭—大别造山带中东部。全矿区共划分为四面山、廖湾、鄢山3个矿段,共圈定了6条石英脉型黑钨矿矿体,填补了河南省矿床史上未发现独立形成黑钨矿的历史空白。在总结归纳前人研究成果的基础上,结合近年来该区的找矿进展,从区域及矿区地质特征入手,总结分析了该钨矿床的成矿特征,并初步分析了区内石英脉型黑钨矿的矿床成因。研究表明:该矿床主要成矿物质来源应晚于晚古生代含榴混合花岗岩,花岗斑岩、似斑状花岗岩岩脉穿插存在矿化叠加现象,与成矿关系密切,矿床属构造—岩浆高温热液矿床。

Xinxian Huwan Tungsten Mine is located at the northern part of Dabie Mountain,the middle east of the Qinling-Dabie orgenic belt.The whole mining area can be divided into Simianshan,Liaowan and Yanshan ore sections,six quartz vein type wolframite orebodies are delineated in the area,which fills the historical blank of no independent wolframite deposits have been found in Henan Province.Based on summarizing the previous study results and combing with the recent prospecting progress in the area,the metallogenic characteristics of the tungsten deposit is discussed based on analyzing geological characteristics of the region and mining area,besides that,the deposit genesis of the quartz vein type wolframite deposit in the area is studied preliminarily.The study results show that the main metallogenic material of the deposit is later than the Late Paleozoic granitic mixed granit,mineralization superposition phenomenon in existed in the alternation of granite porphyry and porphyritic granite veins,which is closely related to mineralization,the deposit genesis belongs to tectonic-magmatic high temperature hydrothermal deposit.