Metallogenesis of Porphyry Copper Deposit Indicated by In Situ Zircon U-Pb-Hf-O and Apatite Sr Isotopes

doi:10.3390/min12111464

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	Metallogenesis of Porphyry Copper Deposit Indicated by In Situ Zircon U-Pb-Hf-O and Apatite Sr Isotopes
	Zhang, Hong 3; An, Fang 3; Ling, Mingxing 2; Feng, Xiaolin 3; Sun, Weidong 1
刊名	MINERALS
	2022-11-01
卷号	12 期号:11 页码:21
关键词	porphyry copper deposit metallogenesis in situ zircon U-Pb-Hf-O isotopes in situ apatite Sr isotopes ore-forming fluids
DOI	10.3390/min12111464
通讯作者	Zhang, Hong(zhanghong820426@163.com)
英文摘要	The origin of the Dexing porphyry Cu deposit is hotly debated. Zircon and apatite are important accessory minerals that record key information of mineralization processes. SHRIMP zircon U-Pb analyses of granodiorite porphyries yield ages of 168.9 +/- 1.2 Ma, 168.0 +/- 1.0 Ma, and 172.8 +/- 1.3 Ma, whereas zircons in the volcanic rocks of the Shuangqiaoshan Group have Neoproterozoic ages of 830 +/- 7 Ma, 829 +/- 8 Ma, and 899 +/- 12 Ma. The porphyry displays zircon in situ delta O-18 of mantle values (5.5 +/- 0.2 parts per thousand), low apatite Sr-87/Sr-86 ratios (0.7058 +/- 0.0005), and high epsilon(Hf) values (5.1 +/- 1.5), which are consistent with mantle-derived magmatic rocks. Apatite from the porphyries has relatively high total rare earth elements (REEs) and negative Eu anomalies, with relatively high Cl and As contents. These features are distinctly different from apatite in the Shuangqiaoshan Group, which shows lower total REE, Cl, and As contents but higher F content and positive Eu anomalies. Zircon in porphyries yields a relative high oxygen fugacity of increment FMQ + 1.5 based on zircon Ce4+/Ce3+. Apatite in porphyries also shows high oxygen fugacity based on its SO3 and Mn compositions, reaching increment FMQ + 2, which is different from that of the lower continental crust in general, but similar to subduction-related magmas. In contrast, the oxygen fugacity of the Shuangqiaoshan Group is much lower, suggesting a different origin for its wall rock. Therefore, the Dexing porphyries were not derived from the lower crust but derived from partial melting of the subducting Paleo-Pacific plate.
资助项目	National Natural Science Foundation of China ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[41402064] ; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (Qingdao)[42130102] ; [2022QNLM050201-4]
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	MDPI
WOS记录号	WOS:000895664300001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/181012]
专题	海洋研究所_深海极端环境与生命过程研究中心
通讯作者	Zhang, Hong
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Peoples R China 3.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hong,An, Fang,Ling, Mingxing,et al. Metallogenesis of Porphyry Copper Deposit Indicated by In Situ Zircon U-Pb-Hf-O and Apatite Sr Isotopes[J]. MINERALS,2022,12(11):21.
APA	Zhang, Hong,An, Fang,Ling, Mingxing,Feng, Xiaolin,&Sun, Weidong.(2022).Metallogenesis of Porphyry Copper Deposit Indicated by In Situ Zircon U-Pb-Hf-O and Apatite Sr Isotopes.MINERALS,12(11),21.
MLA	Zhang, Hong,et al."Metallogenesis of Porphyry Copper Deposit Indicated by In Situ Zircon U-Pb-Hf-O and Apatite Sr Isotopes".MINERALS 12.11(2022):21.