Lead Isotope Geochemistry of the Jilongshan Skarn-Host Au-Cu Deposit, Hubei Province, China

Abstract:

Jilongshan Au-Cu deposit is a typical skarn deposit in the southeastern Hubei metallographic province of the Middle-Lower Yangtze River Fe-Cu metallogenic belt. But little study of ore-forming material source has been made in Jilongshan Au-Cu deposit. Therefore, we discussed the ore-forming material source by analyzing 15 lead geochemistry samples collected in Jilongshan deposit. The ranges of the Pb isotopic compositions are from 17.358 to 18.589 for 206Pb/204Pb, 15.414 to 15.745 for 207Pb/204Pb and 37.956 to 39.094 for 208Pb/204Pb, which are anomalous and their single-stage model ages cannot be used as a criterion for metallogenic epoch. However, the distributing characteristics of the single-stage model ages suggest that the ore Pb have mixing sources. The linear distribution of Pb isotope in tectonic model diagram suggests that the consistent relation of granodiorite porphyry, skarn, marble and ore, which is also a good proof that the ore-forming materials are partly from magma.

• Periodical: Advanced Materials Research (Volumes 468-471)
• Pages: 1952-1956
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.468-471.1952
• Online since: February 2012
• Authors: Bao Jian Jia, Sheng Rong Li, A Juan Pang, Cheng Dong Yang, Yu Tong Yan
• Keywords: Au-Cu Deposit, Hubei, Jilongshan, Material Source, Pb Isotopes

References

[1] Wu Chaoqun, Yang Hongzhi. The geochemical characteristics and metallogenic model in the Jilongshan skarn Gold-Copper deposit. Geology and Prospecting, 1993, 29, 52-57.

[2] Wu Chaoqun. Discussion on metallogenetic material mources of Jilongshan Au-Cu deposit in Hubei Proveince. Geotectonica et Metallogenia, 1992, 16, 190-192.

[3] Bi Zhongmin, Yang Song. Geological mineral resources' characteristics, matters' sources and metallogenic mechanism of the Jilongshan skarn-host Au(Cu) deposit. Mineral Resources and Geology, 2008, 22, 496-502.

[4] Chang Yinfo, Dong Shuwen, Huang Dezhi. On tectonics of "Poly-Basement with one Cover" in Middle-lower Yangtze Craton China. Volcanology & Mineral Resource, 1994,17, 1-15.

[5] Peng Cong, Zhao Yiming. Deep geophysical background and distribution of Auriferous skarn deposits in the Middle and Lower Yangtze Valley and neighboring areas. Geophysical & Geochemical Exploration, 1998, 22, 175-182.

[6] Zhang Yinan. Geology and geochemistry of main Gold(Copper)-Bearing skarn deposits in the Middle and Lower Yangtze River Valley and adjacent Region of China. BeiJing: Academy of Geological Sciences for Doctoral Degree, 1999, 58-60.

DOI: 10.1016/s0169-1368(99)00008-6

[7] Shu Quanan, Chen Peiliang, Cheng Jianrong, Cheng Jianrong, et al. Iron and copper mineral and geology in eastern Hubei province. Beijing: Metallurgical Industry Press,1992, 313-318.

[8] Zartman R E, Doe B R. Plumbotectonics—the model.Tectonophysics, 1981, 75,135-162.

DOI: 10.1016/0040-1951(81)90213-4

[9] Zhao Bin. The major skarn and skarn type deposits in China. Beijing: Science Press, 1989, 97-123.

[10] Zhu Bingquan, Li Xianhua, Dai Tongmo, et al. Isotopic systematic theory and application in earth science: Concurrently discussing crust-mantle evolution of Chinese continent. Beijing: Science Press, 1998, 216-235.

[11] Chen Yuwei，Mao Cunxiao and Zhu Bingquan．Lead isotopic composition and genesis of phanerozoic metal deposits in China. Geochemistry, 1982, 137-158.

DOI: 10.1007/bf03180326