| 王焰,白学让.陕西柞水银硐子银铅多金属矿床成因矿物学研究[J].地质找矿论丛,1994,(3):83-92 |
| 陕西柞水银硐子银铅多金属矿床成因矿物学研究 |
| STUDY OF GENETIC MINERALOGY IN YINDONGZI SILVER-LEAD POLYMETALLIC DEPOSIT IN ZHASHUI COUNTY,SHANXI PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1994.3. 010 |
| 中文关键词: 银铅多金属矿床 成因矿物学 海底喷流沉积矿床 陕西柞水 |
| 英文关键词: |
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| 中文摘要: |
| 秦岭泥盆系是我国一个重要的多金属矿床成矿带。本文主要研究了位于该成矿带中的柞水银硐子银铅多金属矿床中的黄铁矿、方铅矿、重晶石和石英的成因矿物学特征。通过对上述矿物的微量元素组成,硫、铅及氢氧同位素组成和包裹体气、液相成分组成特征的分析,认为该矿床具有沉积和热液成矿的双重特征,属海底喷流沉积矿床。其成矿物质源于下伏的寒武-奥陶系基底岩层,而中泥盆统特别是大西沟组地层对该矿床只具时控和层控作用。硫源为细菌还原海水硫酸盐而生成的硫化氢硫。成矿介质为Na-Ca-Cl型水化学类型,成矿温度均在200～250℃之间,成矿压力为20MPa左右。 |
| 英文摘要: |
| Abstract In Qinling Devonian rocks is one of the most important polymetallic minerogenic belt in China.This paper mainly deals with characteristics of the genetic mineralogy for pyrite, galena, barite and quantz of the Yindongzi silver-lead polymetallic deposit which is one of the deposits in Qinling polymetallic minerogenic belt. Based on the study of the features about microelement compositions,stable isotopecompositions and compositions of gasphase and liquid-phase of inclusions for the minerals mentioned above,it has been found that this deposit has the symbols of both sedimentary and hydrothermal mineralization,thus can be regared as a submarine exhalation deposit. Its minerogenic elements are from underlying ∈-O foundation bed while the strata of middle Devonian series, espically that of Daxigou Group,only have time-bound and strata-bound function to this deposit. Its sulfur source is hydrogen-sulfide sulfur which are formed by the bacteria reducing sulfate in the sea. The kind of minerogenic medium is Na-Ca-Cl hydrochemical type and its,minerogenic temperature is about 200-250℃ and pressure is about 200×105s Pa±. |
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