摘要
大兴安岭铜钼矿床主要与古生代和中生代浅成侵入岩和火山-次火山岩有关,矿床形成于陆缘岩浆岩带、造山带和深大断裂带中.成矿期主要为加里东期、华力西期和燕山期.矿化围岩为花岗闪长岩、花岗闪长玢岩、二长花岗岩、安山岩、英安岩、流纹岩、安山玢岩、流纹斑岩和火山碎屑岩.围岩蚀变主要有硅化、绢云母化、钾长石化、水白云母化、伊利石化、绿泥石化、碳酸岩化.矿石中主要工业元素为Cu和Mo,伴生有益组分为Ag、Au、Re等.成矿类型有:①斑岩型铜钼矿床;②火山-次火山热液型铜钼矿床.大兴安岭铜钼矿床主要由陆缘岩浆岩带、造山带、深大断裂带的火山-次火山作用及小型侵入作用形成,成矿流体沿着火山机构、岩浆侵入构造、区域构造等运移,热动力、压力、扩散力等使成矿流体产生上升运动和局部循环运动,成矿流体的迁移、萃取、扩散、交代作用等使成矿物质产生富集.
The copper-molybdenum deposits in Daxinganling region are related to the Paleozoic and Mesozoic hypabyssal intrusive and volcanic-subvolcanic rocks.Those deposits were formed in the epicontinental magmatic zones,orogenic belts and deep-fracture zones,during Caledonian,Variscan and Yanshanian epochs.The wall rocks consist of granodiorite,granodioritic porphyrite,adamellite,andesite,dacite,rhyolite,andesitic porphyrite,rhyolitic porphyry and pyroclastic rocks,with alterations of silicification,sericitization,K-feldspathization,hydromicazation,illitization,chloritization and carbonation.The main industrial elements in the ore are Cu and Mo,associated with Ag,Au,Re etc.The metallogenesis are in two types,i.e.porphyry copper-molybdenum deposit and volcanic-subvolcanic hydrothermal deposit.
出处
《地质与资源》
CAS
2010年第3期197-202,共6页
Geology and Resources
基金
中国地质调查局"大兴安岭成矿带铜多金属矿勘查选区研究"项目(编号1212010631506)资助
关键词
铜钼矿床
浅成侵入作用
火山-次火山岩
大兴安岭
copper-molybdenum deposit
hypabyssal intrusion
volcanic-subvolcanic rock
Daxinganling
