河南栾川中鱼库矽卡岩矿物学特征及地质意义

发布时间：2018-04-24 19:24

本文选题：矽卡岩 + 矿物学　；参考：《成都理工大学学报(自然科学版)》2017年03期

【摘要】：河南栾川中鱼库硫锌多金属矿床是近年来发现的矽卡岩型硫锌多金属矿床,为进一步探讨其成矿机制,本文以矽卡岩矿物为研究对象,开展了野外观察、岩矿鉴定和电子探针分析综合研究。研究表明,矿床成矿阶段可细分为早矽卡岩阶段、退化蚀变阶段(晚矽卡岩阶段)、石英-硫化物阶段、石英-碳酸盐阶段。该矿床矽卡岩为交代成因的钙矽卡岩,石榴子石以钙铁榴石-钙铝榴石系列为主,辉石以透辉石-钙铁辉石系列为主,帘石主要为绿帘石,角闪石为钙角闪石,绿泥石为铁镁绿泥石。石榴子石、辉石端元组分特征显示矽卡岩阶段成矿流体经历了从酸性到碱性、从还原到氧化的转变。随着流体演变,从退化蚀变阶段到石英-硫化物阶段,成岩成矿环境逐渐从氧化环境过渡到还原环境。石英-硫化物阶段是成矿主阶段,在此阶段金属硫化物大量富集和沉淀。
[Abstract]:The Yuku sulphide zinc polymetallic deposit in Luanchuan, Henan Province, is a skarn type sulfide zinc polymetallic deposit discovered in recent years. In order to further explore its metallogenic mechanism, the skarn mineral is taken as the object of study and field observation is carried out in this paper. Comprehensive study of rock and ore identification and electron probe analysis. The results show that the ore forming stage can be divided into early skarn stage, degenerative alteration stage (late skarn stage, quartz-sulfide stage, quartz-carbonate stage). The skarn of the deposit is of metasomatic origin, and the garnet is mainly composed of calcium iron garnet and calcium aluminite series, the pyroxene is mainly diopside-calcium ferrite series, the curtain is mainly green curtain, the amphibole is calcium hornblende. Chlorite is iron magnesium chlorite. The characteristics of the end components of pomegranate and pyroxene show that the ore-forming fluid in skarn stage has undergone a transition from acid to alkalinity, from reduction to oxidation. With the fluid evolution, from the degenerative alteration stage to the quartz-sulfide stage, the diagenetic and metallogenic environment gradually transition from the oxidation environment to the reduction environment. The quartz-sulfide stage is the main metallogenic stage in which metal sulphides are enriched and precipitated in large quantities.
【作者单位】：中国地质大学地球科学与资源学院;中国地质调查局成都地质调查中心;
【基金】：中国地质调查局地质调查项目(1212011220925) 国家“十二五”科技支撑计划项目(2011BAB04B06)
【分类号】：P577;P618.2

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