S-Pb isotopic geochemistry of Xiuwacu magmatic hydrothermal Mo-W deposit in Zhongdian area, NW Yunnan: Constrains on the sources of metal
文献类型：期刊论文
| 作者 | Wang XS(王新松); Bi XW(毕献武); Hu RZ(胡瑞忠); Leng CB(冷成彪); Yu HJ(余海军); Yin GH(尹光侯) |
| 刊名 | 岩石学报
 |
| 出版日期 | 2015 |
| 卷号 | 31期号:11页码:3171-3188 |
| 其他题名 | 滇西北中甸地区休瓦促岩浆热液型Mo-W矿床S、Pb同位素对成矿物质来源的约束 |
| 英文摘要 | A Late Cretaceous Mo-Cu-(W) metallogenic belt was found in the Zhongdian area, southern portion of the Yidun Arc, which is not only distinguished from contemporary Sn-Ag-Pb-Zn mineralization in the northern Yidun Arc, but also different from the Late Triassic porphyry Cu mineralization in the same area. The reason why the metals of that above mineralization in the Yidun Arc are different remains unclear, as a lacking of researches on the sources of ore-forming materials of those Late Cretaceous deposits in the Zhongdian area. The Xiuwacu deposit is a large-scale Late Cretaceous Mo-W deposit in the Zhongdian area, with ages ranging from 85Ma to 83 Ma. Three stages of the Late Cretaceous granites developed in the area consist of biotite granitic porphyry, monzogranite, and alkali-feldspar leucogranite. In addition, fluorite-feldspar pegmatite vein occurred under the alkali-feldspar leucogranite. The ore bodies are mainly of the quartz-vein-type, greisen-type and porphyry type. They are hosted in hornblende biotite monzogranite and biotite monzogranite, and distributed extending NNW along regional faults. Hydrothermal alteration consists mainly of K-feldspathization, greisenization, argillization, and silicification. Microthermometric data indicate a moderate-to-high temperature (146. 6 similar to 550. 0 degrees C), low-to-moderate salinity (3. 15% similar to 12. 51% NaCleqv), CO2-rich, aqueous ore-forming fluid, which were probably derived from postmagmatic hydrothermal solution. Both of the sulfide minerals and granites have similar Pb isotopic compositions (Pb-206/Pb-204 = 18. 610 similar to 19. 460, Pb-207/Pb-204 = 15. 606 similar to 15. 747, Pb-208/Pb-204 = 38. 815 similar to 39. 410) suggest that the metallogenic elements were probably derived from magmas. The S isotope of sulfide minerals (delta(34) SCVCDT, : 2. 07% similar to 4. 33(sic)) also indicate a magma sources. Comparing the S-Pb isotopes and petrogeochemistry of Xiuwacu Mo-W mineralization with contemporary Sn-Ag-Pb-Zn mineralization in the northern Yidun Arc and Late Triassic porphyry Cu mineralization in the Zhongdian area, it shows that each of those magma events has different characteristics and metallogenic specialization. In other words, partial melting of thickened moderate to mafic lower continental crust would generate fertile magmas for Mo-Cu-( W) mineralization in the southern Yidun Arc; mixing of the mantle- and sediment-derived melts probably product favorable magmas for Sn-polymetallic mineralization in the northern Yidun Arc; and the Late Triassic porphyry Cu mineralization are genetically related to the mantle-derived magmas. |
| 学科主题 | 矿床地球化学 |
| 语种 | 中文 |
| 公开日期 | 2017-05-18 |
| 源URL | [http://ir.gyig.ac.cn:8080/handle/352002/6074]  |
| 专题 | 地球化学研究所_矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文 |
| 推荐引用方式 GB/T 7714 | Wang XS,Bi XW,Hu RZ,et al. S-Pb isotopic geochemistry of Xiuwacu magmatic hydrothermal Mo-W deposit in Zhongdian area, NW Yunnan: Constrains on the sources of metal[J]. 岩石学报,2015,31(11):3171-3188. |
| APA | Wang XS,Bi XW,Hu RZ,Leng CB,Yu HJ,&Yin GH.(2015).S-Pb isotopic geochemistry of Xiuwacu magmatic hydrothermal Mo-W deposit in Zhongdian area, NW Yunnan: Constrains on the sources of metal.岩石学报,31(11),3171-3188. |
| MLA | Wang XS,et al."S-Pb isotopic geochemistry of Xiuwacu magmatic hydrothermal Mo-W deposit in Zhongdian area, NW Yunnan: Constrains on the sources of metal".岩石学报 31.11(2015):3171-3188. |
入库方式： OAI收割
来源：地球化学研究所
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