Manganoan skarn in the Shizhuyuan polymetallic tungsten deposit, Hunan Province
Résumé
A manganoan skarn in the ShizhuyQan supergiant W-Sn-MO-Bi-Be deposit is sixdied i n the present papzr. I t co~sistosf spessartine, almandi~ic-spessartinic garnet, rhodonite, tephroite, helvite, alabandine, Mo-bearing salite, Mn-rich hedenbergite, &In-rich phlogopite and rhodochrosite and spacio-temporally develops together with the greisenization and releva~t mineralizai-ions after calcic skarnization and retrograde alteration. From proximal to distal contact zones, its mineral assemblages become incseasi~glyc omplicated and the manganese content of their varicras minerals is getting higher and higher. The complicated mineral assemblages of the manganoax skarrr and their spaciotemporal distribution apparently prove the evolutional direction of the skarn in the Shizhuyuan polymet allic tungsten deposit.