月龙铜矿成矿类型及找矿前景

根据对月龙铜铅矿的成矿地质环境、矿床地质特征、含矿岩体和矿化特征等的分析,认识到该矿产出于红柳河-牛圈子-洗肠井缝合带的南侧,属于早古生代被动大陆边缘地质环境。含矿地层为青白口系大豁落山群,母岩为花岗斑岩,已发现的矿化主要在围岩硅化白云岩与花岗斑岩接触带附近。根据岩石化学判别,认为该花岗斑岩属＂S＂型花岗岩类型,具有钾质花岗岩的特征。对比本区已发现的重要斑岩铜矿床———公婆泉矿床和白山堂矿床,认为它们之间有一定的可比性,应属于同一成因类型。考虑到月龙铜铅矿的花岗斑岩体剥蚀浅,区域上还有相似的一些岩体,因而本区仍具有寻找斑岩型（包括岩体内部的细脉-浸染状,接触带的交代充填状和外部的脉状矿化）铜矿的找矿前景。

The Metallogenic Type and Ore-Prospecting Potential of Yuelong Copper Deposit

According to the analysis of ore-forming geological environment,ore deposit geology feature,rock mass,and mineralization characteristic of Yuelong lead and copper deposit,we have realized that this deposit is located the south of the Hongliuhe-Niuquanzi-Xichangjing suture zone and belongs to the Early Paleozoic Passive continental margin.The ore-bearing strata are Dahuoluo Mountain Group of the Qingbaikouan System,its parent rock is granitic porphyry.The mineralization discovered mainly located in the contact zone between dolomite and granitic porphyry.On the basis of petrochemistry data,we hold that the granitic porphyry is the S-type granite,having the character of kaligranite.Comparing the Gongpoquan and Baishantang Porphyry copper deposit found in this area,we think that they are the same genetic type of ore deposit.In consideration of the shallow denudation of the granitic porphyry in Yuelong copper and lead deposit and there are more similar rock masses,the we think that finding more Porphyry copper deposits in this area is quite possible(including fine veins-disseminated in rock mass and metasomatism filling in contact zone and vein-type out of the rock mass).