铜山口矿区钨矿地质特征及下步找矿方向

Geological characteristics and prospecting direction of tungsten deposit in Tongshankou mining area

鄂东南矿集区西南部的铜山口铜钼矿床是一个矽卡岩-斑岩复合型矿床,矽卡岩型矿体主要产于中下三叠统嘉陵江组碳酸盐岩与花岗闪长斑岩岩株体接触部位,斑岩型矿体产于岩体内部裂隙。矿区蚀变类型齐全,蚀变矿物种类丰富,且热液蚀变具有一定的分带性。最近的勘查工作,在深部发现有钨矿(化)体,整体呈现出浅部以铜为主,深部以钨钼为主的产出特征,对比区内其他钨矿床,总结钨矿成矿特征;根据总结的成矿地质特征和蚀变矿物化学组成的特征,总结矿床成矿模式;并圈定出Ⅰ号矿体深部仍具有一定的找矿空间。

Tongshankou copper-molybdenum deposit in the southwest of the ore concentration area in Southeast Hubei is a skarn porphyry composite deposit,the skarn type ore body mainly occurs in the contact part between the carbonate rock and granodiorite porphyry of the middle lower triassic Jialingjiang formation,and the porphyry type ore body occurs in the internal fracture of the rock mass.The alteration types are complete,the types of altered minerals are rich,and the hydrothermal alteration has certain zonation.In recent exploration work,tungsten ore(mineralized)bodies have been found in the deep part,showing the occurrence characteristics of copper in the shallow part and tungsten and molybdenum in the deep part,compared with other tungsten deposits in the area,the metallogenic characteristics of tungsten deposits are summarized,according to the summarized metallogenic geological characteristics and chemical composition of altered minerals,the metallogenic model of the deposit is summarized;and the deep part of No.1 ore body is still prospecting space.