GEOLOGICAL CHARACTERISTICS AND METALLOGENIC REGULARITIES OF THE XILINHE SILVER DEPOSIT IN JILIN PROVINCE

The recently discovered Xilinhe epithermal silver deposit in Fusong, Eastern Jilin Province occurs in the contact zone between the Archean granite and Proterozoic marble. The deposit is located within the ductile shear zone in the most northeast of Longgang fault block, with vein-type orebodies controlled by the ductile faults. The ores are in hedral-subhedral texture, granular texture, inclusion texture, filling texture, crushing texture, internal cleavage texture, droplet texture and erosion texture, with veinlet structure, disseminated structure, massive structure and brecciated structure. The metal minerals in the ore include argentite, dyscrasite, silver, pyrite, galena, sphalerite, chalcopyrite, tetrahedrite, covellite, stibnite, etc., with nonmetallic minerals of quartz, sericite, calcite, chlorite, etc. The genetic type of the deposit belongs to post-magmatic epi-mesothermal filling silver deposit. The major ore-controlling factors are structure, lithological strata and magmatic rocks.