| 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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| 关键词:sulfur isotope lead isotope micro-disseminated type gold deposit Yunnan-Guizhou-Guangxi |
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| Sulfur-Lead Isotope Geochemistry of Micro-disseminated Gold Deposits in Yunnan-Guizhou-Guangxi Area |
| 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. |
| LI Yi,XU Wenxin,LIU Wuhui,LI Heng,DAI Tagen.2005.Sulfur-Lead Isotope Geochemistry of Micro-disseminated Gold Deposits in Yunnan-Guizhou-Guangxi Area[J].Acta Geoscientica Sinica,26(z1):168-170. |
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