个旧东区蚀变花岗岩型锡-铜多金属矿床地质地球化学特征与勘探  

Geological and Geochemical Features and Its Exploration of Altered Granite Type Sn-Cu Polymetallic Deposits in Eastern Part of Gejiu, Yunnan, China

作　　者：沈思联 李建平 杨宝富 

机构地区：[1]云南锡业股份有限公司,云南个旧661000

出　　处：《矿物学报》2016年第4期471-478,共8页Acta Mineralogica Sinica

摘　　要：蚀变花岗岩型锡-铜矿化是个旧矿区的一种新资源类型,其分布广,找矿潜力巨大。对这类矿化地质特征、花岗岩岩石学、蚀变分带、地球化学等进行总结与研究,认为其成矿作用与燕山期花岗岩浆期后热液密切相关,成矿物质来源以燕山期花岗岩为主,具多源性,钾化、硅化与萤石化组合是蚀变花岗岩型矿化的重要蚀变和找矿标志,矿化的产出受花岗岩岩体形态的控制,老卡岩体顶部及边部为该类型矿化重点找矿靶区。应用地球化学方法区分蚀变、矿化和成矿元素异常范围,可以缩小工作靶区,从而扩大个旧东区蚀变花岗岩型锡-铜多金属矿找矿效果。An altered granite type of Sn-Cu polymetallic mineralization, as a new resource type, is characterized by wide distribution and huge potential prospecting in Gejiu ore area, Yunnan Province, China. Geological mineralization characteristics, granite petrology, alteration zones, and geological of the mineralization were researched and suggested that the mineralization was related to the post-magmatic hydrothermal of Yanshanian granite, with the ore-forming material sources of multi sources and dominated by the granite. The assemblages of potassic-alteration, silicatization and fluoritization are the most important alteration and signs for prospecting of the mineralization. The orebody occurrence was controlled by the surface morphology of granite, and the top and around Laoka rock mass will be key prospecting target for mineralization. The distinguishing alteration zones and the anomaly extension of ore-forming elements by geological and geochemical research will be useful for reducing exploration risk, and will help developing the exploration of altered granite type resource in eastern Gejiu ore area.

关 键 词：蚀变花岗岩型锡-铜多金属矿化 地质地球化学 蚀变分带 找矿方向 个旧锡多金属矿床 

分 类 号：P618.4[天文地球—矿床学]