| 西藏邦铺铅锌矿床S、Pb、C、O同位素组成及成矿物质来源研究 |
| |
| 关键词:sulfur isotope lead isotope carbon and oxygen isotope source of ore-forming materials crustal contamination ore-forming fluid Bangpu |
| 基金项目:国家973项目(编号: 2011CB403103);国土资源地质大调查项目(编号: 1212010012005) |
|
| 摘要点击次数: 5144 |
| 全文下载次数: 4628 |
| 摘要: |
| Sulfur, Lead, Carbon and Oxygen Isotope Composition and Source of Ore-forming Materials of the Bangpu Pb-Zn Ore Deposit in Tibet |
| The Bangpu Pb-Zn deposit, formed in the periphery of the porphyry mineralization body of the ore district, is a skarn deposit with relatively rich ore grade, and the ore-forming elements are dominated by lead and zinc, without copper basically. Main metal sulfides were objects of this study, and S and Pb isotopic methods were used to investigate the source of the ore-forming minerals. The results show that the δ34S values of the ore metal sulfides have a wide distribution, and mainly vary in the range of –3.7‰– –0.7‰, with the characteristics of tower distribution, and that these sulfur materials were mainly derived from the magma. Lead isotopes of the ore have stable composition and are positive common lead. The high μ values (larger than 9.58) of ore lead and the distribution characteristics of the data points in the evolution diagram of tectonic environment indicate that the ore lead was mainly derived from the upper crust. A comparison between this deposit and the nearby Zhibula and Jiama deposits shows that sulfur of these three deposits was exclusively derived from magma, and their metal materials show a certain regular pattern in source space, i.e., the contamination of crustal source material increased from south to north in the Qulong-Jiama-Bangpu ore district. Carbon and Oxygen isotope compositions of marble and calcite show that carbon in ore-forming fluid was mainly derived from the magma whereas the carbonate formation provided parts of other ore-forming materials. |
| WANG Li-qiang,LUO Mao-cheng,YUAN Zhi-jie,CHEN Wei,LENG Qiu-feng,ZHANG Xue-quan.2012.Sulfur, Lead, Carbon and Oxygen Isotope Composition and Source of Ore-forming Materials of the Bangpu Pb-Zn Ore Deposit in Tibet[J].Acta Geoscientica Sinica,33(4):435-443. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|