| 广东大宝山多金属矿床成矿物质来源同位素证据 |
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| 关键词:isotopic polymetallic deposit Dabaoshan Guangdong |
| 基金项目:国家科技支撑计划项目(编号:2006BAB01B00) |
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| Isotope Evidence of Material Sources of the Dabaoshan Polymetallic Deposit |
| According to S,Pb,H and O isotopic composition analyses of ores and gangue minerals in the Dabaoshan polymetallic deposit,the 206Pb/204Pb ratio varies from 17.930 to 21.480,207Pb/204Pb ratio from 15.491 to 16.215,and the 208Pb/204Pb ratio from 56.390 to 37.990,forming a good linear relationship. The δ34S value of pyrite in Devonian strata ranges from-22.5‰ to +17.9‰,whereas the δ34S value of the sulfide deposits from -2.4‰ to +4.6‰.The association of pyrite,sphalerite and galena is characterized by δ34Spy>δ34Ssp>δ34Sgn, and the δ34SΣS(0±3‰) is estimated from the sulfur isotopic composition of pyrrhotine. The hydrogen isotope value of sulfude inclusions varies from -101‰ to -123‰, and the oxygen isotope value of quartz associated with sulfide is +9.3‰～+17.9‰. If it is converted into the oxygen isotope of water, the value ranges from +0.3‰ to +3.9‰, suggesting that the sources of the ore - forming hydrothermal fluids were rather complex. |
| XU Wen-xin,LI Heng,CHEN Min-yang,HUANG De-xin,ZHANG FU-tie,WANG LI-ming.2008.Isotope Evidence of Material Sources of the Dabaoshan Polymetallic Deposit[J].Acta Geoscientica Sinica,29(6):684-690. |
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