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Yinyan Sn deposit, Xinyi Co., Maoming Prefecture, Guangdong Province, China

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Latitude & Longitude (WGS84): 22° 21' North , 111° 20' East
Latitude & Longitude (decimal): 22.35, 111.333333333
Name(s) in local language(s):银岩锡矿, 信宜市, 茂名市, 广东省, 中国

Concealed greisen-porphyry tin deposit, associated with a small granite porphyry stock. Additionally, vein-type cassiterite-sulphide mineralization occurs in the periphery of the stock.

Mineral List

25 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

443.8 - 541 Ma
Cambrian-Ordovician sedimentary rocks

Age: Paleozoic (443.8 - 541 Ma)

Lithology: Sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Guiqing Li (1982): Tin deposit types of Guangdong Province. Geology and Prospecting 18(3), 18-23 (in Chinese).

Zhiliang Wu (1983): Geological features of the Yinyan porphyry tin deposit. Geology and Prospecting 19(7), 21-25 (in Chinese).

Xunfan Guan, Yongqing Zhou, Jinghua Xiao, Shuzhao Liang, and Jinmao Li (1985): Yinyan porphyry tin deposit - a new type of tin deposits in China. Acta Geologica Sinica 64(2).

Guan, X., Shou, Y., Xiao, J., Lian, S., and Li, J. (1988): A new type of tin deposit - the Yinyan porphyry tin deposit in China. In: Hutchison, C.S. (ed.): Geology of Tin Deposits in Asia and the Pacific. Springer Verlag (Berlin, New York), pp. 487-494.

Yihan Xie, Rui Zhao, Ruomei Li, and Yinglan Wang (1988): Physical-chemical conditions and material sources for mineralization of the Yinyan porphyry tin deposit. Mineral Deposits 7(3), 42-49 (in Chinese with English abstract).

Zhu Zhengshu, Zhu Jinchu, and Xu Keqin (1989): Geology, geochemistry and genesis of Yinyan porphyry tin deposit. Chinese Journal of Geochemistry 8(4), 374-384.

Chunlian Xiao (2008): Selection of a sorting process for tin ore from Yinyan, Xinyi County, Guangdong Province. Express Information of Mining Industry, Serial 470, 70-72 (in Chinese).

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