Xinqiao Mine, Xinqiao ore field, Tongling Prefecture, Anhui Province, China

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Polymetallic deposit with two major types of mineralization: one is an economically significant stratiform orebody hosted in the Lower Carboniferous Gaolishan siltstone and overlying Middle Carboniferous Huanglong limestone, while the other is a less important skarn-type mineralization restricted to the contact between Yanshanian diorite (110–168 Ma) and Lower Permian Qixia marble. The ore in the Xinqiao deposit is dominated by massive pyrite with minor amounts of other sulphides and oxides.

Some references list two neighbouring deposits, Xinqiao-A (30°55'44'' N, 117°59'40'' E) and Xinqiao-B (30°55'44'' N, 118°00'00'' E). The minerals occurring in the two deposits are essentially the same, but there appear to be differences in the relative abundances of the ore minerals and in the extent of the oxdiation zone. It is not always evident however, which deposit is meant when minerals are listed, and most papers treat Xinqiao as a single deposit anyway. Therefore, we have combined the Xinqiao deposits in one entry.

References

- Yiming Zhao, Yinan Zhang, and Chengsi Bi (1999): Geology of gold-bearing skarn deposits in the middle and lower Yangtze River Valley and adjacent regions. Ore Geology Reviews 14, 227-249.
- Yuanming Pan and Ping Dong (1999): The Lower Changjiang (Yangzi/Yangtze) River metallogenic belt, east central China: intrusion- and wall rock-hosted Cu-Fe-Au, Mo, Zn, Pb, Ag deposits. Ore Geology Reviews 15, 177-242.
- Xu, G., and Zhou, J. (2001): The Xinqiao Cu–S–Fe–Au deposit in the Tongling mineral district, China: synorogenic remobilization of a stratiform sulfide deposit. Ore Geology Reviews 18(1/2), 77-94.
- Yan-Bin Wang, Pu-Sheng Zeng, Yan-He Li, Yi-Feng Meng, Zhu-Sen Yang, and Shi-Hong Tian (2004): Origin of Ore-Forming Fluids of the Xinqiao Cu-Au Deposit in the Tongling Mineral District, Anhui: Evidence from He and Ar Isotopes. Geoscience [Xiandai Dizhi] 18(4), 524-528.
- Jianfeng Gao and Jianjun Lu (2005): REE characters of sulphide oxidation zone of Xinqiao massive sulphide deposit of Anhui, China. Geochimica et Cosmochimica Acta Supplement 69(10), Supplement 1: Goldschmidt Conference Abstracts 2005, no. A880.
- Lianxing Gu, Khin Zaw, Wenxuan Hu, Kaijun Zhang, Pei Ni, Jinxiang He, Yaotong Xu, Jianjun Lu, and Chunming Lin (2007): Distinctive features of Late Palaeozoic massive sulphide deposits in South China. Ore Geology Reviews 31, 107-138.
- Yanjing Chen, Huayong Chen, Khin Zaw, Pirajno, F., and Zengjie Zhang (2007): Geodynamic settings and tectonic model of skarn gold deposits in China: An overview. Ore Geology Reviews 31, 139-169.

Mineral List

Actinolite Anhydrite Antigorite Arsenopyrite Baryte Bismuthinite Bornite Calcite Chalcocite Chalcopyrite 'Chlorite Group' Covellite Diopside Dolomite

Dolomite var: Ferroan Dolomite Epidote Forsterite Galena 'Garnet' Goethite Gold var: Electrum Gypsum Hematite Humite Kaolinite 'K Feldspar' Limonite

Magnetite Malachite Marcasite 'Melnikovite' Molybdenite Muscovite var: Sericite Phlogopite 'Psilomelane' Pyrite Pyrolusite Pyrrhotite Quartz 'Serpentine Group'

Siderite Silver Sphalerite var: Marmatite Talc Tenorite Tetradymite Tetrahedrite Tremolite Wittichenite Wollastonite

53 entries listed. 42 valid minerals.