| 滇黔桂地区微细浸染型金矿硫铅同位素地球化学研究 |
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| 引用本文：李毅,徐文忻,刘悟辉,李蘅,戴塔根.2005.滇黔桂地区微细浸染型金矿硫铅同位素地球化学研究[J].地球学报,26(z1):168-170. |
| DOI：10.3975/cagsb.2005.s1.54 |
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| 中文摘要:对滇、黔、桂微细浸染型金矿硫化物进行硫、铅同位素测定，获得马雄、浪全、金牙、高龙、堂上等矿床206Pb/204Pb比值为17.636～19.530；207Pb/204Pb比值为15.451～16.092；208Pb/204Pb比值为37.871～40.854。用等时线斜率与铅同位素曲线关系剖析，矿床形成年代晚于矿床赋存层位，铅来源较为复杂。金牙矿床硫化物的δ34S值为15.3‰～15.6‰；板其矿床硫化物的δ34S值为－1.5‰～14.7‰；柴木函矿床硫化物的δ34S值为0.2‰～18.0‰；戈塘矿床硫化物的δ34S值为－29.2‰～5.0‰；丫他矿床硫化物的δ34S值为5.5‰～8.0‰，获得矿床有单一岩浆来源，单一海水（地层）来源和混合来源3种类型矿床。 |
| 中文关键词:硫同位素 铅同位素 微细浸染型 金矿床 滇黔桂地区 |
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| Sulfur-Lead Isotope Geochemistry of Micro-disseminated Gold Deposits in Yunnan-Guizhou-Guangxi Area |
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| Abstract:The sulfide and lead minerals in the micro-disseminated gold deposits of Yunnan-Guizhou-Guangxi area were analyzed bysulfur lead methods.It is shown that 206Pb/204Pb values vary from 17.636 to 19.530；207Pb/204Pb from 15.451 to 16.092；208Pb/204Pb from 37.871 to 40.854 in such deposits as Maxiong,Langchuan,Jingya,Gaolong and Changshang.The gold deposits were formed later than their host sedimentary rocks.The origins of lead are complicated.Thδ34S values of sulfides in the Jingya deposit vary from -23‰ to -1‰,those in the Gaolong deposit vary from - 15.3‰ to 15.6‰,those in the Banqi deposit vary from －1.5‰ to 14.7‰,those in the Chaimohan deposit vary from 0.2‰ to 18.0‰.those in the Guochang deposit vary from -29.2‰ to 5.0‰,and those in the Yata deposit vary from 5.5‰ to 8.0‰,These data indicate that exist three sulfur sources,i.e., magma,seawater and mixed magma and sulfate in seawater. |
| keywords:sulfur isotope lead isotope micro-disseminated type gold deposit Yunnan-Guizhou-Guangxi |
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