CAJ | 학술논문

本文通过显微观察和电子探针分析，发现大平山铜矿矿石中砷元素主要以硫化物方式，呈毒砂和少量砷黝铜矿独立矿物赋存于矿石中。毒砂主要呈自形半自形粒状、他形粒状，赋存方式主要有：(1)以独立矿物呈稀疏浸染状分布于矿石中，局部呈条带状和中等稠密浸染状分布于矿石中；(2)呈交代方式与黄铁矿和黄铜矿伴生于矿石中，毒砂形成一般晚于黄铁矿和黄铜矿；(3)有少数毒砂被晚期黄铜矿、黄铁矿晶体包裹。砷黝铜矿呈他形粒状与黄铁矿、黄铜矿和毒砂共生，往往交代黄铁矿和黄铜矿。硫同位素分析结果表明砷主要来自晚期岩浆热液，或可能来自晚期火山热液；铅同位素分析结果表明砷可能主要来自上地壳。
본문통과현미관찰화전자탐침분석，발현대평산동광광석중신원소주요이류화물방식，정독사화소량신유동광독립광물부존우광석중。독사주요정자형반자형립상、타형립상，부존방식주요유：(1)이독립광물정희소침염상분포우광석중，국부정조대상화중등주밀침염상분포우광석중；(2)정교대방식여황철광화황동광반생우광석중，독사형성일반만우황철광화황동광；(3)유소수독사피만기황동광、황철광정체포과。신유동광정타형립상여황철광、황동광화독사공생，왕왕교대황철광화황동광。류동위소분석결과표명신주요래자만기암장열액，혹가능래자만기화산열액；연동위소분석결과표명신가능주요래자상지각。
The detection of Arsenic,under the microscope,appeared chiefly in the form of sulphide from the Dapingshan Copper deposit using electron microprobe analysis,with the appearance of arsenopyrite and a small amount of tennatite independently distributed in the ore.Arsenopyrites are mainly found in the form of automorphic-hypidiomorphic granular texture and xenomorphic granular texture.Its mode of occurrence are as follows:firstly,it acts as an independent sparsity disseminated mineral with partial strip and medium dense dissemination distributed in ore;secondly,it replaces the paragenic chalcopyrite and pyrite in ore after their formation;finally,small amounts of arsenopyrites are often wrapped with late crystal form of chalcopyrite and pyrite.The content of tennantite in ore is modest,and the paragenesis of xenomorphic granular texture with chalcopyrite,pyrite and arsenopyrite often leads to the replacement of chalcopyrite and pyrite.The current Sulfur isotope analysis revealed the derivation of arsenic from the late-magmatic hydrothermal or the late-volcanic hydrothermal fluids,whereas the Lead isotope analysis indicated the derivation of arsenic from the upper earth crust.