Jiapigou Mine, Jiapigou auriferous greenstone belt, Jiapigou ore field, Huadian City, Jilin, Jilin, Chinai

Regional Level Types
Jiapigou Mine	Mine
Jiapigou auriferous greenstone belt	Mineral Belt
Jiapigou ore field	Ore Field
Huadian City	City
Jilin	Prefecture-level City
Jilin	Province
China	Country

Large-scale shear zone and quartz vein type gold deposit, consisting of sulphide-poor gold veins occurring in a NW-trending belt that is concordant to a NW-trending shear zone. The deposit is hosted along the northern boundary of the Jilin-Liaoning-Shangdong tonalite-trondhjemite-granodiorite terrane of the North China Platform. The oldest isotopic age is 3.0 Ga. Younger heating events occurred at mainly 2.5 to 2.6 Ga and 1.9 to 1.6 Ga. The origin of the deposit is debated with some geologists interpreting the deposits as related to magmatism during the Hercynian and/or Yanshan Orogeny.

This deposit has been mined since more than 100 years.

The ∼ 150 to 180 Ma Jiapigou gold deposit, is hosted in Neoarchean granite-greenstones, with a gold reserve of > 100 t and gold grades of ∼ 4 to 19 g/t. Proterozoic to Cenozoic sedimentary strata are exposed in the northern and eastern of the mining area. Magmatism in the district area can be divided into three stages: (1) Neoarchean to Paleoproterozoic (2683 to 2462 Ma) granites are distributed in the southwest of and within the mining area; (2) Paleozoic (323 to 252 Ma) granites are distributed in the northern and eastern of the mining area; (3) Mesozoic granites (132 to 240 Ma) are abundantly distributed in the eastern of the mining area. Four mineralization stages can be identified: (I) the white quartz vein stage containing quartz and minor sulfides; (II) the quartz-pyrite vein stage containing quartz, abundant pyrites, and minor pyrrhotite and native gold; (III) the quartz-sulfide vein stage containing quartz, abundant pyrite, galena and chalcopyrite, as well as sphalerite and native gold; and (IV) the quartz-carbonate vein stage containing quartz, calcite, dolomite, and minor sulfides.

Orebodies are restricted by a group of ductile shear zones striking mainly from NE to ENE. Mineralization occurs mainly as gold-bearing quartz veins along the shear zone and adjacent alteration zones. By far, >20 mineralizing quartz veins have been discovered, where most veins are concealed and only a few are exposed to the surface. These auriferous quartz veins occur in a discrete fashion and most are trending sub-parallel to the ENE-striking alteration zones. They generally have lengths varying from 50 to 730 m along the strike direction and thickness from 0.5 to 20 m in width. The host rocks are amphibolite and hornblende gneiss and altered wall rock mainly includes sericitization, silicification, phyllic alteration, pyritization, chloritisation, epidotisation, and carbonitisation.

Other Regions, Features and Areas containing this locality

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