| 贵州牛角塘镉锌矿床中发现原生硫镉矿 |
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| 引用本文： | 刘铁庚,张乾,叶霖,邵树勋.贵州牛角塘镉锌矿床中发现原生硫镉矿[J].矿物学报,2004,24(2):191-196. |
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| 作者姓名： | 刘铁庚 张乾 叶霖 邵树勋 |
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| 作者单位： | 中国科学院,地球化学研究所,矿床地球化学开放研究实验室,贵州,贵阳550002 |
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| 基金项目： | 国家自然科学基金(批准号:40172037,40373021)，中国科学院矿床地球化学开放实验室基金 |
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| 摘 要： | 在贵州牛角塘镉锌矿床中既有次生硫镉矿的存在，也发现了原生硫镉矿。硫镉矿的产状如下：①呈包裹体形式产于硫化物中；②以不规则晶粒赋存于硫化物粒间：③形成硫镉矿．方铅矿细脉或硫镉矿微脉穿插硫化物；④分布在黄铁矿中方铅矿或闪锌矿周围；⑤被菱锌矿胶结并交代，形成硫镉矿残骸状角砾；⑥组成菱锌矿．硫镉矿疏松集合体或菱锌矿．硫镉矿细脉；⑦呈皮壳状或薄膜状分布在氧化矿石表面或裂隙面上。前五种形式产出的硫镉矿为原生硫镉矿，主要分布在原生矿石或弱氧化的矿石中。后两种产状的硫镉矿为次生硫镉矿，分布于氧化矿石晶洞中或矿石表面和裂隙面上。并从Cd、Zn地球化学特性、热力学和结晶化学性质探讨了原生硫镉矿形成机制。
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| 关 键 词： | 镉锌矿床 硫镉矿 产出形式 矿物共生组合 |
| 文章编号： | 1000-4734(2004)02-0191-06 |
| 修稿时间： | 2003年10月23 |
DISCOVERY OF PRIMARY GREENOCKITE IN NATURE,AS EXEMPLIFIED BY THE NIUJIAOTANG CADMIUM-ZINC DEPOSIT,GUIZHOU |
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| LIU Tie-geng,ZHANG Qian,YE Lin,SHAO Shu-xun.DISCOVERY OF PRIMARY GREENOCKITE IN NATURE,AS EXEMPLIFIED BY THE NIUJIAOTANG CADMIUM-ZINC DEPOSIT,GUIZHOU[J].Acta Mineralogica Sinica,2004,24(2):191-196. |
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| Authors: | LIU Tie-geng ZHANG Qian YE Lin SHAO Shu-xun |
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| Abstract: | It is thought that greenockite is a seconday (supergenic) mineral, but there has been found primary greenockite in the Niujiaotang cadmium-zinc deposit in Guizhou.Its occurrence is described as follows: 1) as inclusions occurring in sulfide; 2) as irregular crystal gains occurring among sulphides; 3) as greenockite or greenockite-galena veinlets penetrating sulfides,or as smithsonite-greenockite veinlets penetrating dolomite;4) around sulphide; 5) as loose aggregates of smithsonite-greenockite; 6) as crusts of smithsonite-greenockite. Genetically, greenockites can be divided into three types: 1) occurring at the stage of precipitation and rock-formation; 2) by hydrothermal process; 3) occurring after outcropping on the surface due to weathering-leaching. But the mechanism of formation of primary greenockite is discussed in terms of thermodynamics and crystallography. |
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| Keywords: | Niujiaotang cadmium-zinc deposit greenockite occurrence coexisting minerals |
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