云南金平龙脖河铜矿区新莲矿段矿床地质及成因  

Geology And Genesis Of The Xinlian Oreblock Deposit In The Lonbohe Coppermine Area Of Jinping,Yunnan

作　　者：秦金虎 何丽萍 彭小虎 韩大海 QIN Jin-hu;HE Li-ping;PENG Xiao-hu;HAN Da-hai(Yunnan Nonferrous Geology Bureau 308 Team,Gejiu 661000,China;Yunnan Fusheng Zinc Xin Investment Co.,Ltd.,Kunming 650021,China;Shanxi Geological Exploration Bureau 217 Geological Team Co.,Ltd.,Datong 037008,China)

机构地区：[1]云南省有色地质局三0八队,云南个旧661000 [2]云南富盛锌鑫投资股份有限公司,云南昆明650021 [3]山西省地质勘查局二一七地质队有限公司,山西大同037008

出　　处：《世界有色金属》2023年第22期120-123,共4页World Nonferrous Metals

基　　金：云南省有色地质局“百名人才”工程资金资助(编号:[2022]42-三0八队-07)。

摘　　要：位于哀牢山成矿带南端的金平龙脖河铜矿床,是云南省重要的铜矿生产基地之一,受地层岩性、构造及海相变基性火山岩控制,属典型的海相火山块状硫化物型铜矿床,其具有矿床规模大、铜品位稳定及矿石质量佳等特点。通过总结勘查成果,发现该矿床走向上被多组北东向断裂切错,形成的微型地垒构造,对矿体埋深有较大影响;横向上受“两断夹一背”的构造格局控矿。通过矿物研究发现火山碎屑岩经变质作用,形成以钠长岩为主的岩石,矿化期伴随强烈的碳酸盐化、绿泥石化,是铜矿物生成的重要标志。铜矿物主要在成矿热液阶段生成,说明矿床在初始矿体形成阶段受到多元热液作用,后期岩浆热液对先成矿体进行了叠加富化,矿床成因可概括为:海底火山喷流-沉积+多元热液叠加富化的块状硫化物型矿床。By summarizing the exploration results,it is found that the strike of the deposit is cut by multiple sets of NEtrending faults,and the micro-horst structure formed has a great influence on the buried depth of the ore body.Horizontally,it is controlled by the structural pattern of'two faults and one back'.Through mineral research,it is found that volcanic clastic rocks are metamorphosed to form albite-based rocks.The mineralization period is accompanied by strong carbonation and chloritization,which is an important symbol of copper mineral formation.Copper minerals are mainly formed in the oreforming hydrothermal stage,indicating that the deposit is subjected to multiple hydrothermal processes in the initial ore body formation stage,and the later magmatic hydrothermal fluid superimposes and enriches the pre-formed ore body.The genesis of the deposit can be summarized as:submarine volcanic exhalation-deposition+multiple hydrothermal superimposed enrichment of massive sulfide deposits.

关 键 词：变基性火山岩 热液 地质特征 矿床成因 龙脖河铜矿 

分 类 号：P618.41[天文地球—矿床学]