Geochronology and origin of the Qi189 porphyry gold deposit in Qiyugou Orefield, Qinling Orogen, China
文献类型：期刊论文
| 作者 | Qi, Nan; Wang, Pin; Yu, Jie; Chen, Yan-Jing |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2019 |
| 卷号 | 114页码:UNSP 103121 |
| 关键词 | Zircon U-Pb age Re-Os age Qi189 porphyry gold deposit Qiyugou Orefield Qinling Orogen |
| DOI | 10.1016/j.oregeorev.2019.103121 |
| 英文摘要 | The Qi189 gold deposit is a recently discovered porphyry system in the Qiyugou Orefield, located in the northeastern Qinling Orogen along the southern margin of North China Craton. The orebodies are hosted in the porphyritic granite emplaced in the Taihua Supergroup. Three molybdenite and five pyrite samples from the ores yield Re-Os isochron ages of 129.5 +/- 2.8 Ma and 127.5 +/- 8.2 Ma, respectively, which are coincident with the zircon U-Pb age of the porphyritic granite within analytical error (128.6 +/- 0.8 Ma). Zircon grains from the post-ore quartz monzonite yield weighted mean Pb-206/U-238 age of 124.7 +/- 0.6 Ma (n = 31,1 sigma, MSWD = 0.23). These ages constrain that the Qi189 gold system was formed in the period of 130-127 Ma. The porphyritic granite and quartz monzonite show high-K calc-alkaline affinity, enrichment of LREE and LILE, depletion of HREE and HFSE, and negligible Eu anomaly. Zircon grains show negative eHf(t) values of - 20.7 to -14.9, with T-DM2(Hf) ages of 2.49-2.13 Ga. This indicates that the Qi189 porphyry system originated from a source mixed by the materials from the North Qinling Accretion Belt and the basement of North China Craton, with minor contribution from the mantle, and developed under a post-collisional tectonic setting. |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41630313]; China National Gold Group ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41630313]; China National Gold Group |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18255]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Qi, Nan,Wang, Pin,Yu, Jie,et al. Geochronology and origin of the Qi189 porphyry gold deposit in Qiyugou Orefield, Qinling Orogen, China[J]. ORE GEOLOGY REVIEWS,2019,114:UNSP 103121. |
| APA | Qi, Nan,Wang, Pin,Yu, Jie,&Chen, Yan-Jing.(2019).Geochronology and origin of the Qi189 porphyry gold deposit in Qiyugou Orefield, Qinling Orogen, China.ORE GEOLOGY REVIEWS,114,UNSP 103121. |
| MLA | Qi, Nan,et al."Geochronology and origin of the Qi189 porphyry gold deposit in Qiyugou Orefield, Qinling Orogen, China".ORE GEOLOGY REVIEWS 114(2019):UNSP 103121. |
入库方式： OAI收割
来源：南海海洋研究所
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