| 河北金厂峪金矿床辉钼矿与金矿化关系研究及意义 |
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| 关键词:molybdenite In-situ trace element Re-Os isotopic dating quartz vein-type gold deposit Jinchangyu Jidong |
| 基金项目:国家重点研发计划项目(编号: 2018YFC0604106);自然资源部杰出青年人才项目(编号: KY-BR-XZ-202006) |
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| Relationship between Molybdenite and Gold Mineralization in Jinchangyu Gold Deposit, Hebei Province and Its Significance |
| Re-Os dating of molybdenite is a direct and accurate means to date quartz vein-type gold deposits using the model age or isochron approach. However, to correctly identify the exact relationship between molybdenite and gold mineralization, representative molybdenite samples should be selected for dating. In this study, we focused on the largest gold deposit in eastern Hebei Province—Jinchangyu gold deposit— and compared the microscopic structure and in-situ trace element characteristics of molybdenite and auriferous pyrite from quartz-albite-polymetallic sulfide vein. Quartz-albite-polymetallic sulfide veins were found to contain significant amounts of visible gold and invisible gold; both pyrite and molybdenite are known as important gold-bearing sulfides. Based on detailed mineralogical work, we suggest that the early gold-bearing pyrite experienced a remobilization process, which acts as an important source of Au for gold-rich molybdenite. Further, the two may be products of different ore-forming fluid pulse periods under the same large-scale gold mineralization event. Molybdenite was formed in the main metallogenic stage of the Jinchangyu gold deposit, which is closely related to the secondary concentration of Au and may be used as one of the symbolic minerals to identify high-grade gold ore bodies. Based on the accurate determination of the relationship between molybdenite and gold mineralization, the molybdenite Re-Os chronometer is a reliable direct dating method for identifying quartz vein-type gold deposits. |
| SUN Hao,SONG Yang,LI Chao,ZHENG Ming,SUN Peng-cheng,FANG Ying.2022.Relationship between Molybdenite and Gold Mineralization in Jinchangyu Gold Deposit, Hebei Province and Its Significance[J].Acta Geoscientica Sinica,43(2):157-171. |
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