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Volume 14
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10.3390/min14010007
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Article

Petrogenesis of the Weideshan Pluton in Jiaodong and Its Implications for Gold Polymetallic Mineralization: Constraints from Zircon U-Pb-Hf Isotopes, Petrogeochemistry, and Whole-Rock Sr-Nd Isotopes

by
Pengfei Wei
1,
Dapeng Li
1,*,
Ke Geng
1,
Yan Zhang
1,
Qiang Liu
1,
Wei Xie
1,
Yingxin Song
1,
Na Cai
1,
Chao Zhang
1 and
Zhigang Song
1,2,*
1
Key Laboratory of Gold Mineralization Processes and Resource Utilization, Ministry of Natural Resources, Shandong Provincial Key Laboratory of Metallogenic Geological Process and Resource Utilization, Shandong Institute of Geological Sciences, Jinan 250013, China
2
Key Laboratory of Depositional Mineralization and Sedimentary Mineral of Shandong Province, College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
*
Authors to whom correspondence should be addressed.
Minerals 2024, 14(1), 7; https://doi.org/10.3390/min14010007
Submission received: 25 October 2023 / Revised: 8 December 2023 / Accepted: 15 December 2023 / Published: 19 December 2023
(This article belongs to the Special Issue Porphyry Metallogenic System: Genetic Mineralogy and Prospecting Mineralogy)
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Abstract

The Early Cretaceous Weideshan granites are associated with large-scale Au and polymetallic Cu-Mo-Pb-Zn mineralization. To investigate the petrogenesis of the Weideshan granite and constrain its tectonic setting during the Early Cretaceous, we conducted a zircon U-Pb-Hf isotope and whole-rock geochemical and Sr-Nd isotopic study of the granite. In situ zircon U-Pb dating of three granite samples yielded Early Cretaceous ages of 112.83 ± 0.80, 112.64 ± 0.91, and 111.82 ± 0.78 Ma. The samples had high-K calc-alkaline compositions and were enriched in the light rare earth and large-ion lithophile elements (e.g., K, Rb, Ba, Th, and U) and depleted in high-field-strength elements (e.g., Nb, Ti, and P). The samples had small negative Eu anomalies and initial 87Sr/86Sr and εNd(t) values of 0.70853–0.71029 and –18 to –14, respectively. The zircon εHf(t) values varied between −16 and −12, with corresponding two-stage model ages (tDM2) of 2180–2000 Ma. These characteristics indicated that the Weideshan pluton was formed in a back-arc extensional environment caused by subduction of the Paleo-Pacific Plate toward the Asian continent during the early Cretaceous. The magma was generated by crust–mantle interaction during lithospheric thinning. The diagenetic age of the Weideshan granites was the same as the formation age of gold and polymetallic ores in the Jiaodong area. The extensive fluid circulation induced by the magma emplacement may be the main source of ore-forming materials for the gold and polymetallic Cu-Mo-Pb-Zn deposits.
Keywords: Weideshan pluton; zircon U-Pb age; Sr-Nd isotopes; crust–mantle source; gold and polymetallic mineralization Weideshan pluton; zircon U-Pb age; Sr-Nd isotopes; crust–mantle source; gold and polymetallic mineralization

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MDPI and ACS Style

Wei, P.; Li, D.; Geng, K.; Zhang, Y.; Liu, Q.; Xie, W.; Song, Y.; Cai, N.; Zhang, C.; Song, Z. Petrogenesis of the Weideshan Pluton in Jiaodong and Its Implications for Gold Polymetallic Mineralization: Constraints from Zircon U-Pb-Hf Isotopes, Petrogeochemistry, and Whole-Rock Sr-Nd Isotopes. Minerals 2024, 14, 7. https://doi.org/10.3390/min14010007

AMA Style

Wei P, Li D, Geng K, Zhang Y, Liu Q, Xie W, Song Y, Cai N, Zhang C, Song Z. Petrogenesis of the Weideshan Pluton in Jiaodong and Its Implications for Gold Polymetallic Mineralization: Constraints from Zircon U-Pb-Hf Isotopes, Petrogeochemistry, and Whole-Rock Sr-Nd Isotopes. Minerals. 2024; 14(1):7. https://doi.org/10.3390/min14010007

Chicago/Turabian Style

Wei, Pengfei, Dapeng Li, Ke Geng, Yan Zhang, Qiang Liu, Wei Xie, Yingxin Song, Na Cai, Chao Zhang, and Zhigang Song. 2024. "Petrogenesis of the Weideshan Pluton in Jiaodong and Its Implications for Gold Polymetallic Mineralization: Constraints from Zircon U-Pb-Hf Isotopes, Petrogeochemistry, and Whole-Rock Sr-Nd Isotopes" Minerals 14, no. 1: 7. https://doi.org/10.3390/min14010007

APA Style

Wei, P., Li, D., Geng, K., Zhang, Y., Liu, Q., Xie, W., Song, Y., Cai, N., Zhang, C., & Song, Z. (2024). Petrogenesis of the Weideshan Pluton in Jiaodong and Its Implications for Gold Polymetallic Mineralization: Constraints from Zircon U-Pb-Hf Isotopes, Petrogeochemistry, and Whole-Rock Sr-Nd Isotopes. Minerals, 14(1), 7. https://doi.org/10.3390/min14010007

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