LI Guang-lai1，HUA Ren-min¹，LI Xiang¹，WEI Xin-lin²，HUANG Xiao-e²，HU Dong-quan¹，ZHANG Wen-lan¹，WANG Xu-dong¹

(1. State Key Laboratory for Mineral Deposits Research, Nanjing University, Nanjing 210093, China;
2. Jiangxi Bureau of Nonferrous Metal Exploration, Nanchang 330001, China)

Abstract：A pink mineral was newly found in Baxiannao tungsten deposit, southern Jiangxi province, China. Analytical results of Laser Raman spectra, XRD patterns and electron-microprobe all proved that the mineral was triplite, the manganese end-member of triplite-zwieselite series. The calculated chemical formula is (Mn, Fe, Mg, Ca)2PO4(F, OH). It occurs in the wolframite-bearing quartz vein and is associated with quartz and fluorite, which indicates that the ore-forming fluid is rich in phosphor and fluorine. The triplite contains a lot of fluid inclusions of two phases. Almost all of the fluid inclusions are aqueous-rich and many of them are larger than 150 um. Raman spectra showed that the liquid phase was water while the gas phase contained not only H2O, but also CH4 and CO2. The discovery of triplite together with quartz and fluorite in the tungsten deposit suggests that the related granite is most likely attributed to the fluorine-rich category.

Key words：triplite;XRD; Laser Raman spectra; electron-microprobe; Baxiannao tungsten deposit

E-mail：huarenmin@nju.edu.cn

ACTA MINERALOGICA SINICA　　Vol. 30, No. 3, 2010, Page 273-277