Jiapigou ore field, Huadian Co., Jilin Prefecture, Jilin Province (Manchuria; Dongbei Region), China

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夹皮沟金矿田, 桦甸市, 吉林市, 吉林省, 中国

Located on the easternmost portion of the northern margin of the North China Craton (NCC). The Jiapigou orefield is one of the most important gold-producing districts in China, having been responsible for nearly half of Chinas gold production during the 1960s.

The deposits are hosted by Archaean metamorphic rocks, in a shear zone and fault system that defines the boundary between the NCC and its adjacent orogenic belt to the northeast. They lie within several ductile shear zones cutting late Archean gneissic tonalite, trondhjemite, and granodiorite and amphibolite (2523±6 Ma), which have been retrogressed to greenschist facies. The deposits occur as massive auriferous quartz veins that contain sulphides (<10 vol.%) and, less commonly, disseminated- and stockwork-style mineralisations. While phyllic assemblages are the most common alteration style, potassic and chloritic alteration characterises felsic and mafic host rocks, respectively. No major intrusions are recorded in the area, although felsic, alkaline and mafic dykes are common, usually occupying the same fault system as the gold lodes. Dykes also locally host gold mineralisation. Zircon SHRIMP U­-Pb dates on pre-ore dykes yield ages of around 220 Ma, constraining the maximum age of gold mineralisation, whereas 40Ar/39Ar dates on hydrothermal sericite give an age of approximately 204 Ma suggesting a late Triassic gold-forming event. This timing is coeval with, or slightly later than, the post-orogenic magmatism that followed the final orogenesis of the Inner Mongolian-Daxinganling orogenic belt (IMDOB), which bounds the NCC to the north, suggesting that a post-orogenic tectonic setting is appropriate for the late Triassic gold mineralisation.

More than 100 gold deposits and occurrences have been delineated in this area that extends from southern Jilin Prefecture into western Yanbian Prefecture.

Mineral List

Mineral list contains entries from the region specified including sub-localities

Acanthite Actinolite Aikinite Albite 'Albite-Anorthite Series' Altaite Amphibole Supergroup Anglesite Ankerite Arsenopyrite Baryte 'Biotite' Bismuthinite Bornite Calaverite Calcite

Chalcocite Chalcopyrite 'Chlorite Group' Covellite Epidote 'Feldspar Group' Galena Gersdorffite Goethite Gold var: Electrum Graphite Hematite var: Specularite Ilmenite Kaolinite

'Leucoxene' 'Limonite' Magnetite Malachite Marcasite Millerite Muscovite var: Sericite Opal Orpiment Pearceite Pentlandite Pyrargyrite Pyrite 'Pyroxene Group' Pyrrhotite

Quartz var: Chalcedony Realgar Rhodochrosite Scheelite Siderite Silver Sphalerite Stibnite Talc Tetrahedrite Uraninite var: Pitchblende 'Wolframite' Zinkenite

62 entries listed. 49 valid minerals.

Localities in this Region

China Jilin Province (Manchuria; Dongbei Region) Jilin Prefecture Huadian Co. Jiapigou ore field Bajiazi Au deposit Banmiaozi Au deposit Caiqiangzi Au deposit (Caichangzi Au deposit) Dalazi Au deposit Erdaocha Au deposit Erdaogou Mine Hongqigou Au deposit Jiapigou Mine Laoniugou Au deposit Liupiyegou Mine Miaoling Au deposit

China Jilin Province (Manchuria; Dongbei Region) Jilin Prefecture Huadian Co. Jiapigou ore field Sandaocha Mine Sandaogou Mine Sidaocha Au deposit Toudaocha Au deposit Wangjiadian Mine Wudaocha Au deposit Xiaobeigou Au deposit Xiaodonggou Au deposit Xinlitun Au deposit Yangshugou Au deposit Yuanchagou Au deposit

References

External Links