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Jinchangyu Au deposit, Qianxi Co., Tangshan Prefecture, Hebei Province, China
Latitude: 40°18'N
Longitude: 118°26'E
Longitude: 118°26'E
Shear zone and quartz vein-type gold deposit, consisting of diseminations and veinlets that occur parallel to schistosity in mylonite. Host rock alterations are albite, silica, sericite, chlorite, pyrite, and carbonate alterations. The deposit is located in a tonalite-trondhjemite-granodiorite belt in the North China Platform. The host rocks are derived from mafic volcanic rocks, volcanic graywackes, and banded iron formations (BIF) that are metamorphosed to granulite, pyroxene gneiss, and amphibolite. The isotopic age of the metamorphic rock is 3.5 Ga. The metamorphosed supracrustal rock is interpreted by some workers as a greenstone belt. Shearing and retrograde metamorphism to greenschist facies probably occurred at 2.5 to 2.6 Ga, 1.7 to 1.8 Ga, or later.
Mineral List
32 entries listed. 24 valid minerals.
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References
Poulsen, K.H., Taylor, B.E., Robert, F., Mortensen, J.K., Baoqin Lin, Ling Shang, Ershu Shen, and Lidong Zhang (1990): Report on the Sino-Canadian Gold Project 1987-1990. Geological Survey of Canada Open-File Report 2510.
Yuncheng Xu and Xueyi Qi (1991): On the minerogenesis and deep-seated orebody prognostication in the Jinchangyu gold ore district. Geology and Prospecting 27(8), 17-20.
Changjin Cai (1993): A preliminary study on several gold minerals in the Dongping and other gold deposits. Acta Mineralogica Sinica 13(1), 65-71 (in Chinese with English abstract).
Xinping Cai, Bingguang Liu, and Zhonglin Ji (1994): Ore-controlling structures of the Jinchangyu gold deposit and their geophysical validation. Gold Science and Technology 2(5), 1-7 (in Chinese).
Dajun Qin, Xinping Cai, Jie Wan, Haozhong Gao, Baolin Zhang, and Shaoping Zhuo (1997): Preliminary study on the origin of the large-scale gold deposit, Jinchangyu, eastern Hebei. Geology and Prospecting 33(5), 4-9.
Baolin Zhang, Xinping Cai, Jie Wang, Hanzhong Gao, Dajun Qin, and Shaoping Zhou (1998): Preliminary study on metallogenic regularities in the depth of the Jinchangyu gold deposit. Geology and Prospecting 34(5), 14-17.
Hart, C.J.R., Goldfarb, R.J., Yumin Qiu, Snee, L., Miller, L.D., and Miller, M.L. (2002): Gold deposits of the northern margin of the North China Craton: multiple late Paleozoic-Mesozoic mineralizing events. Mineralium Deposita 37, 326-351.
Rodionov, S.M. et al. (2004): Descriptions of Northeast Asia Metallogenic Belts. In: Rodionov, S.M., Obolenskiy, A.A., Seminskiy, Z.V., Bounaeva, T.V., and Nokleberg, W.J. (eds.): USGS Open-File Report 2004-1252.
Yuncheng Xu and Xueyi Qi (1991): On the minerogenesis and deep-seated orebody prognostication in the Jinchangyu gold ore district. Geology and Prospecting 27(8), 17-20.
Changjin Cai (1993): A preliminary study on several gold minerals in the Dongping and other gold deposits. Acta Mineralogica Sinica 13(1), 65-71 (in Chinese with English abstract).
Xinping Cai, Bingguang Liu, and Zhonglin Ji (1994): Ore-controlling structures of the Jinchangyu gold deposit and their geophysical validation. Gold Science and Technology 2(5), 1-7 (in Chinese).
Dajun Qin, Xinping Cai, Jie Wan, Haozhong Gao, Baolin Zhang, and Shaoping Zhuo (1997): Preliminary study on the origin of the large-scale gold deposit, Jinchangyu, eastern Hebei. Geology and Prospecting 33(5), 4-9.
Baolin Zhang, Xinping Cai, Jie Wang, Hanzhong Gao, Dajun Qin, and Shaoping Zhou (1998): Preliminary study on metallogenic regularities in the depth of the Jinchangyu gold deposit. Geology and Prospecting 34(5), 14-17.
Hart, C.J.R., Goldfarb, R.J., Yumin Qiu, Snee, L., Miller, L.D., and Miller, M.L. (2002): Gold deposits of the northern margin of the North China Craton: multiple late Paleozoic-Mesozoic mineralizing events. Mineralium Deposita 37, 326-351.
Rodionov, S.M. et al. (2004): Descriptions of Northeast Asia Metallogenic Belts. In: Rodionov, S.M., Obolenskiy, A.A., Seminskiy, Z.V., Bounaeva, T.V., and Nokleberg, W.J. (eds.): USGS Open-File Report 2004-1252.
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Locality Updated: Segura Mines, Segura, Idanha-a-Nova, Castelo Branco District, PortugalFrom Uwe Kolitsch, 22nd May 2013 09:50:02