Large-scale tin deposit. Most orebodies occur in a 120-250 m wide contact zone between a granite intrusion and Early Permian carbonate rock. Rich ore minerals occur in the concave part of the granite intrusion, small veins occur in some intraformational fissures in skarn far from the contact zone. In carbonate rock at the contact, garnet diopside skarn and garnet amphibole biotite skarn are intensively developed. The ore minerals occur in masses, breccia, veinlets, breccia, and disseminations. Varied late-stage sulphide minerals, amphibole, and epidote replace the skarn and early magnetite. The host Early Permian Dashizai and Huanggangliang Formations predominantly consist of carbonate rock, tuff silstone, and intermediate mafic volcanic rocks. Sn-Fe-skarns occur in two with NE-trending belts in the contact zones between these two formations and a Cretaceous plagioclase granite intrusion (K-Ar isotopic age: 67-115 Ma).
References:- Daizo Ishiyama, Ryoji Sato, Toshio Mizuta, Yohei Ishikawa, and Jingbin Wang (2001): Characteristic Features of Tin-iron-copper Mineralization in the Anle-Huanggangliang Mining Area, Inner Mongolia, China. Resource Geology 51(4), 377-392.
- Wang, L.J., Shimazaki, H., and Shiga, Y. (2001): Skarns and Genesis of the Huanggang Fe-Sn Deposit, Inner Mongolia, China. Resource Geology 51(4), 359-376.
- Lijuan Wang, Hidehiko Shimazaki, Jingbin Wang, and Yuwang Wang (2001): Ore-forming fluid and metallization of the Huanggangliang skarn Fe-Sn deposit, Inner Mongolia. Science in China, Series D (Earth Sciences), 44(8), 735-747.
- Wang Lijuan, Wang Yuwang, Wang Jingbin, and Günther, D. (2006): Fluid mineralization of the Dajing Sn-polymetal deposit: Evidence from LA-ICP-MS analysis of individual fluid inclusions. Chinese Science Bulletin 51(22), 2781-2788.
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http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt
23 entries listed. 17 valid minerals.
