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云南保山核桃坪铅锌矿矿化垂直分带研究
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摘要
根据最新的勘探成果,在分析矿床地质特征的基础上,重点研究矿区内构造岩、矽卡岩等蚀变岩和矿石中各种矿物及其组合的基本特征和空间分布规律。研究表明矿区围岩蚀变和矿化特征具有明显的垂直分带规律。围岩蚀变由中心向边侧可以分为矽卡岩-铅锌矿化带、矽卡岩-黄铁矿化带、碳酸盐-石英-矽卡岩化带、碳酸盐-绿泥石化带。矽卡岩矿物组合纵向上表现为:由透闪石-阳起石矽卡岩向下渐变为阳起石-透闪石-绿帘石矽卡岩、绿帘石-阳起石-透闪石矽卡岩、绿帘石矽卡和绿帘石-绿泥石矽卡岩。由浅表至深部,成矿元素具有Zn、Pb(Fe)→Zn、Pb、Fe(Cu)→Fe(Cu)的分带规律。矿化的垂直分带规律对矿床的深部成矿预测具有重要的指导意义,并为铅锌多金属成矿作用认识提供依据。
        Researches on the Pb-Zn deposit in Hetaoping,Baoshan,Yunnan were carried out in order to figure out some primary vertical zoning regularity of the deposit and characters of minerals and their assemblages in tectonite and skarn,on the basis of recent exploration and analysis of ore deposit geology.Studies show that alteration of the wall rock and mineralization zoned ranging from center to periphery is skarn-Pb-Zn mineralization,skarn-pyrite mineralization,carbonate-quartz-skarnized and carbonate-chloritization.Mineral assemblages in skarnvary widely: tremolite-actinolite,actinolite-tremolite-epidote,epidote-actinolite-tremolite,epidote and epidote-chlorite,from surface to deep,respectively.In addition,ore-forming elements are also vertically zoned by Zn-Pb(Fe),Zn-Pb-Fe (Cu) and Fe(Cu).Thus,the obvious vertical zoning phenomenon is significant for metallogenic prognosis and the further studies on Pb-Zn mineralization.
引文
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