云南中甸岛弧带典型斑岩铜矿床围岩蚀变特征对比及其找矿意义  

The comparison of the features of wall rock alteration and its prospecting significance in typical porphyry copper deposit in Zhongdian arc orogen, Yunnan

作　　者：姜永果[1] 吴静[1] 李峰[1] 崔银亮 张亚辉[1] 

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]云南省有色地质局,昆明650051

出　　处：《矿产勘查》2011年第5期468-474,共7页Mineral Exploration

基　　金：校企横向合作项目(编号:619320090071)资助

摘　　要：中甸岛弧带是斑岩型铜矿的矿集区,区内的斑岩铜矿床围岩蚀变强烈,蚀变分带明显,围岩蚀变与矿化关系密切。文章对分别位于中甸岛弧东、西部成矿带的春都和普朗斑岩铜矿床围岩蚀变及矿化特征进行了对比分析。研究结果表明,2个斑岩铜矿床的围岩蚀变类型主要表现形式以及蚀变分带模式基本相同,研究还得出中甸岛弧带斑岩铜矿床钾硅化带以及绢英岩化带的蚀变强度及其规模共同决定斑岩铜矿床的规模。中甸岛弧带斑岩铜矿床中,青磐岩化玢岩为找矿的间接标志,绢英岩化或钾硅化斑岩(玢岩)为找矿的直接标志。Zhongdian arc orogen is an important centralized zone of porphyry copper, where the wall rock alteration strongly related with mineralization is fierce and alteration zones are obivious. The characteristics of the wall rock alteration and mineralization of Pulang in the eastern matollgenic belts and Chundu porphyry copper deposit in the western matollgenic belts of Zhongdian arc were compared and analysised in this article. The studies show that the wall rock alteration types and zonality of alteration are roughly the same between Pulang and Chunduin porphyry copper deposits, and that the scale of porphyry copper deposit are controlled by thestrength and scale of kali silicification zone and sericitolite zone as well. In the porphyry copper deposit of Zhongdian arc orgen belts, the propylitization porphyrite is an indirect prospecting sign, while sericitolite porphyry and kali silicification are the direct prospecting signs.

关 键 词：围岩蚀变 斑岩铜矿 中甸岛弧带 云南 

分 类 号：P618.41[天文地球—矿床学] P614[天文地球—地质学]