Tungsten ore field, related to the Xihuashan Jurassic biotite granite intrusion. The exposed area of the granite (19 km2) hosts the Xihuashan and Dangping Mines. The other mines are located further north and work vein-type deposits in the contact zone between the granite and overlying country rocks.
The granite comprises two phases, which intruded in Cambrian low-grade metamorphic rocks of psammitic and pelitic origins. The first phase is a coarse grained porphyrytic biotite granite, rich in monazite-(Ce), xenotime-(Y), zircon and uranothorianite. This granite is the mother rock of the fluids for tungsten mineralization. A second phase, medium-fine grained biotite granite (magmatic to hydrothermal stage, final oversaturation of the granitic melt in a fluid phase and F-CO2 enrichment) is mineralized with spessartite (Y-rich), xenotime-(Y), gadolinite-(Y), fergusonite-(Y) and Y-rich fluorite.
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References
Le Bel, L., Yidou Li, and Jifou Sheng (1984): Granitic evolution of the Xihuashan-Dangping (Jiangxi, China) Tungsten-Bearing system. Mineralogy and Petrology 33(3), 149-167.
Yongwen Mei (1985): Distribution of tungsten ores in the Xihuashan-Zongshukeng area. Geology and Prospecting 21(4), 11-16.
Zhuansong Wang, Fuzhen Chen, and Guoliang Cao (1985): Evolution of the chemical composition of the Xihuashan granite. Geology and Prospecting 21(10), 37-42.
Orris, G.J., and Grauch, R.I. (2002): Rare Earth Element Mines, Deposits and Occurrences. USGS Open-File Report 02-189, 174 pp.
Rucheng Wang, Fontan, F., Xiaoming Chen, Huan Hu, Changshi Liu, Shijin Xu, and de Parseval, P. (2003): Accessory minerals in the Xihuashan Y-enriched granitic complex, Southern China: A record of magmatic and hydrothermal stages of evolution. Canadian Mineralogist 41, 727-748.
Guoneng Chen and Grapes, R. (2007): Granite Genesis: In-Situ Melting and Crustal Evolution. Springer Verlag, 278 pp.
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