Shizuyuan deposit is a compound type of greisen and skarn associated' with W,mo,Sn,and BI mineralization._x000D_
Tungsten-bearing skarns are located at the contacts between carbonate rocks and granitic stock. Ore-bearing greisens occur in the top of granite or superimpose on the skarn rocks._x000D_
Although mineralization and alteration are heterogeneous,there are clear patterns in the preferred associations of minerals on all scales, and an orderly sequence can be distinguished._x000D_
The sequence of mineralization Isom bhar. Gsesus-.contactroctaard is characterized byVtia of L, a4[~!kient assemblages W(mo,~P),,,W,(,Mo,Sn,Bi),Sn (Bi), and Sn. Skarn formation is divided into an early sk.arnoid stage and a late metasomatic stage. The skarnoid stage formed grandite garnet and diopside pyroxene in the limestone._x000D_
The iron content of garnets decreases significantly away from the granite, whereas pyroxenes maintain a relatively constant diopsitic composition. The metasomatic skarn stage is charac- terized by hydrous silicates. The mineral assemblages of. greisens are regularly distributed in space. The feldspar-quartz-fluoride was usually formed in-the deeper part, upwards giving way to muscovite-quartz, and topaz usually occurs in the uppermost part. The distribution, and miner- alogical relationships of alteration facies suggest that they formed as a result of the progressive reaction of an ascending hydrothermal solution with aluminum-nearing limestones an-d granitic rocks respectively. The ore elements were mobilized and deposited in association. with hydrosilicate alteration of skarns and greisens.