The pelletal grained pumpellyite (Fe2+)（?）occurs in basaltic druses of Zhaotong area, Yunnan Province. The associated minerals include epidote, babingtonite, quartz, prehnite, calcite etc. Scanning electron microscopy reveals that pumpellyite (Fe2+)（?） is tabular and somewhat bended in the direction of cylinder and forms grains around the inclusions. The growth modes depend on the position of inclusions in grains, and the nearer it is to the surface of grains, the more parallel its arrangement. The fluid inclusion thermography and Raman spectra of quartz indicate that pumpellyite (Fe2+)（?） is a product of low temperature hydrothermal activity(148～169℃), with the salinity being 11%～12% and the ore-forming fluids enriched in H2O and minor CH4. In addition, the formation of pumpellyite (Fe2+)（?）grains is possibly related to organic material(CH4).