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Geochronology and Genesis of the Xitian W-Sn Polymetallic Deposit in Eastern Hunan Province, South China: Evidence from Zircon U-Pb and Muscovite Ar-Ar Dating, Petrochemistry, and Wolframite Sr-Nd-Pb Isotopes
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Minerals 2018, 8(5), 213; https://doi.org/10.3390/min8050213

Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions

1
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Central South University, No. 932, Lushan Road, Changsha 410083, China
2
CAS Key Laboratory of Crust-Mantle Materials and Environments, University of Science and Technology of China, Hefei 230026, China
3
School of Environment and Safety Engineering, University of South China, Hengyang 421001, China
4
Sinomine Resource Exploration Co. Ltd., Beijing 100089, China
5
No. 7 Institute of Geology and Mineral Exploration of Shandong Province, Linyi 276006, China
*
Authors to whom correspondence should be addressed.
Received: 21 April 2018 / Revised: 11 May 2018 / Accepted: 12 May 2018 / Published: 15 May 2018
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Abstract

Two small-sized granitic plutons, outcropped in Xianghualing ore field, South Hunan (South China), have a close relationship with the super large-scale Sn–W polymetallic mineralization in this ore field. The Laiziling and Jianfengling plutons are composed of medium- to coarse-grained two-mica and coarse-grained biotite granites, respectively, and have zircon U–Pb ages of 156.4 ± 1.4 Ma and 165.2 ± 1.4 Ma, respectively. Both of the Laiziling and Jianfengling granites are characterized by extremely similar elemental and Lu–Hf isotopic compositions with high contents of SiO2, Al2O3, Na2O, K2O, high A/CNK ratios, negative εHf(t) values (ranging from −3.86 to −1.38 and from −5.44 to −3.71, respectively), and old TDMC ages (ranging from 1.30 to 1.47 Ga and from 1.32 to 1.56 Ga, respectively). These features indicate that they both belong to highly fractionated A-type granites, and were formed in an extensional setting and from the same magma chamber originated from the Paleoproterozoic metamorphic basement of South China with a certain amount of mantle-derived magma involved with temperatures of ca. 730 °C and low oxygen fugacity. View Full-Text
Keywords: zircon U–Pb dating; geochemistry; Lu–Hf isotopes; Xianghualing; South Hunan zircon U–Pb dating; geochemistry; Lu–Hf isotopes; Xianghualing; South Hunan
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Yang, L.; Wu, X.; Cao, J.; Hu, B.; Zhang, X.; Gong, Y.; Liu, W. Geochronology, Petrology, and Genesis of Two Granitic Plutons of the Xianghualing Ore Field in South Hunan Province: Constraints from Zircon U–Pb Dating, Geochemistry, and Lu–Hf Isotopic Compositions. Minerals 2018, 8, 213.

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