青海祁漫塔格地区斑岩铜矿的成矿条件和远景  

METALLOGENIC ENVIRONMENT AND POTENTIAL IN THE QIMANTAGE PORPHYRY COPPER DEPOSIT,QINGHAI

作　　者：何书跃[1] 祁兰英[1] 舒树兰[1] 尹和珍[1] 何寿福[1] 景向阳[1] 

机构地区：[1]青海省地质调查院,西宁810012

出　　处：《地质与勘探》2008年第2期14-22,共9页Geology and Exploration

基　　金：中国地质调查局项目(编号:1212010531402)资助

摘　　要：文章对青海祁漫塔格地区斑岩铜矿成矿带的成矿地质条件进行了研究,其形成于造山带汇聚阶段中后期的活动陆缘环境,与驱龙斑岩铜矿对比具有相类似的成矿地质条件,找矿远景很大,特别是卡而却卡、乌兰乌珠尔、鸭子沟、尕怒大门等地区具有斑岩铜矿成矿的广阔前景,有希望找到新的大型超大型铜矿床。通过对乌兰乌珠尔矿床的解剖,该矿区构造裂隙发育,岩石蚀变强烈,具典型的"斑岩型"蚀变分带:由中心向外依次为强硅化带→硅化钾化带→绢英岩化带→青磐岩化带。成矿元素以铜为主,伴有铅、锌、锡等多种有用组分。岩浆岩、热液蚀变作用、热液运移和矿质沉淀的构造空间控制了矿床的产出。为进一步在该区找矿指明了方向。Based on analyses of geology and metallogenic environment in the Qimantage porphyry copper mineralizing belt of Qinghai Province, the deposits in the belt are formed in the active continental margin during the middle to late convergent stage of orogenesis. Compared with Qulong porphyry copper deposit, it is recognized that Qimantage deposit has similar geological and metallgenic environment with good potential to find large and giant porphyry copper deposits, especially in the Kaerqueka, Wulanwuzhuer, Yazigou, and Ganudanleng areas. Fractures are well developed and wallrocks are strongly altered in the Wulanwuzhuer deposit with typical ＂porphyry type＂ alteration zoning. From inner part to outside, wallrock alteration changes from intense silica.ion, silication and potassic zone, phylhc zone to propytic zone. Mineralizing element is mainly copper, accompanied with useful lead, zinc and tin. The deposit occurrence are controlled by magmatic rocks, hydrothermal alterations and structural space for hydrothermal fluid transportation and ore deposition.

关 键 词：青海 祁漫塔格 斑岩铜矿 成矿条件 远景 

分 类 号：P618.41[天文地球—矿床学]