Yunfu pyrite deposit is a large-scaled deposit，located in the southern section of Qinzhou-Hangzhou Metallogenetic Belt. Ore textures in the Yunfu pyrite deposit can be classified into four types

including the banded

disseminated

massive and veiny. The specimens and microscopic observation show that banded ores suffered the subsequent crumpled structures

the massive ores are composed of two different particle sizes of pyrite

and the pyrite vein cut across all above-mentioned ores. The SEM (Scanning Electron Microscope) coupled with EDS (EnergyDisperseSpectroscopy) measurements are carried out to yield the micro-fabric characteristics of all four types of pyrite. The pyrite grains in the banded ores present as cube euhedral crystal with the growth layer developed

implying that the crystal grows accompanying with multiple layer accumulation. The granularity of pyrite in the disseminated ores is commonly bigger than in banded ores

but the growth layer is inferior to the latter. The pyrite grains in the massive ores contact closely with conchoidal fracture developed on the surface

and therefore their crystal edges are difficult to be distinguished. The particle size of pyrite in the veiny ores is the largest among the four types of ores. The crystal shape presents as hypidiomorphic-xenomorphic implicating the limited growth space. It is conclude that the Yunfu pyrite deposit was developed with two main stages of mineralization

including an earlier exhalative sedimentary mineralization overprinted by subsequence metamorphism and deformation. The exhalative sedimentary stage is presented by the formation of banded and disseminated pyrites

whereas the later stage of hydrothermal superposition formatting is characterized by massive and veiny pyrites.