The genesis of pegmatite-type molybdenum mineralization in Sanshandao, and their implications for molybdenum deposit in Jiaodong, East China
文献类型：期刊论文
| 作者 | Wen BoJie1; Fan HongRui1; Hu FangFang1; Yang KuiFeng1; Liu Xuan1; Cai YaChun1; Sun ZhiFu2; Sun ZongFeng2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2015-04-01 |
| 卷号 | 31期号:4页码:1002-1014 |
| 关键词 | Molybdenite Re-Os isotopic dating Fluid inclusions Isotopes Pegmatite Jiaodong |
| 文献子类 | Article |
| 英文摘要 | Jiaodong is not only an important gold deposits concentration area, but also a crucial copper-molybdenum poly-metal metallogenic area. Molybdenum deposits of different scales are located in the central and eastern Jiaodong, whereas molybdenum mineralization has not been found in the northwestern Jiaodong by far. As deep gold exploitation proceeding in recent years, pegmatites hosted in Neoarchean Jiaodong Group and Late Jurassic Linglong granitoids have been found in the Sanshandao goldfield, northwestern Jiaodong. They are mainly composed of K-feldspar, quartz, muscovite, molybdenite, fluorite; and pyrite, with minor plagioclase, chalcopyrite, sphalerite, and hematite. The Re-Os dating of five molybdenite samples yields a Re-Os model age ranging from 149. 9Ma to 151. 3Ma, with an average value of 150. 0 +/- 1. 0Ma and an isochron age of 149. 7 +/- 1. 5Ma, suggesting the pegmatites formed at ca. 150Ma. Mineral inclusions identified by energy dispersive spectrometer (EDS) are well preserved in K-feldspar phenocrysts, including pyrite, galena, hematite,rutile, chromium hemitrioxide, barite, fluorite, celestite, antimony iodide, and carbonate containing Fe, Mn, Mg, Ca, and Sb. These mineral inclusions indicate that the primary fluids are enriched in metallic elements, which have remarkable potential to produce metallic deposit. Fluid inclusions in the quartz are divided into two types, including pure CO2 fluid inclusions and CO2-H2O fluid inclusions. A small quantity of CH4 and N-2 was detected in some fluid inclusions. Microthermometric studies show that final melting temperature of solid CO2, homogenization temperature and bulk density of the pure CO2 fluid inclusions range from -57. 3 to -56. 6 degrees C, 18. 5 to 25. 1 degrees C, and 0. 71 to 0. 79g/cm(3), respectively. For the CO2 4120 fluid inclusions, final melting temperature of solid CO2, partial homogenization temperature, total homogenization temperature, bulk density and salinity range from -57.4 to -56. 6 degrees C, 9.4 to 31. 1 degrees C, 279 to 350 degrees C, 0.74 to 1. 00g/cm(3), and 3.33% similar to 10. 33% NaCleqv, respectively. The microthermometric data suggests that the fluid belongs to H2O-CO2-NaCl system, which is characterized by low-middle salinity and richness in volatiles. delta D and delta O-18 of the fluid inclusions in quartz vary from -69. 6 parts per thousand to -56. 3 parts per thousand and 3. 2 parts per thousand to 5. 6 parts per thousand, respectively. delta(34) S of pyrite ranges from 4. 1 parts per thousand to 5. 0 parts per thousand. The analysis results of H-O-S stable isotopes support that the formation of the pegmatites was closely related to magmatic water. Pb isotopic data of the K-feldspar are as follows: Pb-206/Pb-204 = 16.7212 similar to 17. 0287, Pb-207/Pb-204 = 15. 4093 similar to 15. 5139, Pb-208/Pb-204 = 37. 4811 similar to 37. 9003, which is similar to the Linglong granitoid, but different from the Jiaodong Group metamorphic rocks and the Mesozoic dike rocks. The contents of Re in molybdenite change from 4. 66 x 10(-6) to 29. 20 x 10(-6), with an average value of 15. 49 x 10(-6). The values are between the mantle source and the crust source, but closer to the crust source, implying metallogenic material might come from the crust. |
| WOS关键词 | LODE-GOLD DEPOSITS ; U-PB ZIRCON ; RE-OS AGES ; GEOLOGICAL SIGNIFICANCE ; LITHOSPHERIC MANTLE ; MESOZOIC GRANITOIDS ; SHANDONG PROVINCE ; ISOTOPIC EVIDENCE ; X PROPERTIES ; MO DEPOSIT |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000353869400009 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62605]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Shandong Gold Co Ltd, Laizhou 264000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wen BoJie,Fan HongRui,Hu FangFang,et al. The genesis of pegmatite-type molybdenum mineralization in Sanshandao, and their implications for molybdenum deposit in Jiaodong, East China[J]. ACTA PETROLOGICA SINICA,2015,31(4):1002-1014. |
| APA | Wen BoJie.,Fan HongRui.,Hu FangFang.,Yang KuiFeng.,Liu Xuan.,...&Sun ZongFeng.(2015).The genesis of pegmatite-type molybdenum mineralization in Sanshandao, and their implications for molybdenum deposit in Jiaodong, East China.ACTA PETROLOGICA SINICA,31(4),1002-1014. |
| MLA | Wen BoJie,et al."The genesis of pegmatite-type molybdenum mineralization in Sanshandao, and their implications for molybdenum deposit in Jiaodong, East China".ACTA PETROLOGICA SINICA 31.4(2015):1002-1014. |
入库方式： OAI收割
来源：地质与地球物理研究所
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