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Open AccessArticle
Geochronology and Geochemistry of Granodiorite Porphyry in the Baoshan Cu-Pb-Zn Deposit, South China: Insights into Petrogenesis and Metallogeny
by
Xueling Dai
Xueling Dai 1,
Ke Chen
Ke Chen 2,3,
Junke Zhang
Junke Zhang 2,3,
Yongshun Li
Yongshun Li 2,3,
Mingpeng He
Mingpeng He 2,3 and
Zhongfa Liu
Zhongfa Liu 2,3,*
1
Hunan Non-Ferrous Industry and Investment Group, Changsha 410100, China
2
Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring (Ministry of Education), Central South University, Changsha 410083, China
3
School of Geosciences and Info-Physics, Central South University, Changsha 410083, China
*
Author to whom correspondence should be addressed.
Minerals 2024, 14(9), 897; https://doi.org/10.3390/min14090897 (registering DOI)
Submission received: 17 July 2024
/
Revised: 26 August 2024
/
Accepted: 28 August 2024
/
Published: 30 August 2024
Abstract
The Baoshan Cu-Pb-Zn deposit is situated at the intersection of the Qin-Hang Cu polymetallic and Nanling W-Sn polymetallic metallogenic belts. The age, lithology, petrogenesis, and tectonic setting of granodiorite porphyry within the deposit remain subjects of debate. Additionally, there is a lack of comparative studies with the W-Sn-related granites in the region. This study conducted whole-rock major and trace element analysis, Sr-Nd isotope analysis, and zircon U-Pb dating on the Baoshan granodiorite porphyry. The zircon U-Pb age of the granodiorite porphyry is 162 ± 1 Ma. The whole-rock SiO2 and K2O contents range from 65.87 to 68.21 wt.% and 3.42 to 5.62 wt.%, respectively, indicating that the granodiorite porphyry belongs to high-potassium calc-alkaline I-type granite. The granodiorite porphyry is characterized by enrichment in LREE and depletion in HREE (LREE/HREE ratio = 6.2–21.2). The samples of granodiorite porphyry generally exhibit weak negative Eu anomalies or no Eu anomalies (δEu = 0.62–1.04, mean = 0.82). The (87Sr/86Sr)i and εNd(t) values are 0.707717–0.709506 and −7.54 to −4.87, respectively. The whole-rock geochemical composition and Sr-Nd isotopic values indicate that the magma originated from the partial melting of the Mesoproterozoic ancient crust and Neoproterozoic mafic juvenile lower crust, with the addition of high oxygen fugacity and water-rich lithospheric mantle melts. The source of the granodiorite porphyry in the Baoshan deposit is significantly different from the crust-derived metapelite source of the W-Sn-related granite in the area, indicating that different magma sources might be the main reason for the co-spatial and nearly contemporaneous development of Cu-Pb-Zn and W-Sn mineralization in the southern Hunan region.
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MDPI and ACS Style
Dai, X.; Chen, K.; Zhang, J.; Li, Y.; He, M.; Liu, Z.
Geochronology and Geochemistry of Granodiorite Porphyry in the Baoshan Cu-Pb-Zn Deposit, South China: Insights into Petrogenesis and Metallogeny. Minerals 2024, 14, 897.
https://doi.org/10.3390/min14090897
AMA Style
Dai X, Chen K, Zhang J, Li Y, He M, Liu Z.
Geochronology and Geochemistry of Granodiorite Porphyry in the Baoshan Cu-Pb-Zn Deposit, South China: Insights into Petrogenesis and Metallogeny. Minerals. 2024; 14(9):897.
https://doi.org/10.3390/min14090897
Chicago/Turabian Style
Dai, Xueling, Ke Chen, Junke Zhang, Yongshun Li, Mingpeng He, and Zhongfa Liu.
2024. "Geochronology and Geochemistry of Granodiorite Porphyry in the Baoshan Cu-Pb-Zn Deposit, South China: Insights into Petrogenesis and Metallogeny" Minerals 14, no. 9: 897.
https://doi.org/10.3390/min14090897
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