Caijiaying Mine, Zhangbei Co., Zhangjiakou Prefecture, Hebei Province, China

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蔡家营铅锌银多金属矿, 张北县, 张家口市, 河北省, 中国

Polymetallic Pb-Zn-Cu-(Ag-Au) vein and stockwork deposit, consisting of swarms of dense veins that range from 300 to 1000 m long, 1 to 18 m thick, and extend 400 to 500 m downdip. Host rock is a fine-grained amphibole gneiss derived from Paleoproterozoic volcanic and sedimentary rocks that are metamorphosed to amphibolite facies. They occur along a limb of an overturned fault. The deposit is related to Jurassic and Cretaceous granite porphyries and quartz porphyry dikes, and Late Jurassic volcanic rocks. It rerpresents a Mesozoic magmatic hydrothermal system. The ore minerals occur in masses and disseminations. The host rocks exhibit chlorite, sericite, silica, pyrite, and carbonate alterations. Early chlorite alteration was replaced by later sericite alteration. From the deposit outwards, the host rocks display successive belts of sericite and chlorite alteration. Fluid inclusion temperatures range from 200°C to 350°C.

References

- Dianhao Huang, Xiaoshi Ding, and Chengyu Wu (1991): Mineral characteristics and occurrence of gold, silver and bismuth of the Caijiaying lead-zinc-silver deposit, Hebei Province. Acta Geologica Sinica 65(2).
- Jiayong Pan, Qian Zhang, and Zongyao Rui (1993): Trace element characteristics of major minerals in the Caijiaying lead-zinc-silver deposit. Journal of Guilin College of Geology 13(4), 386-393.
- Jiayong Pan and Qian Zhang (1994): Discussion of ore-forming elements zoning feature in the Caijiaying polymetallic deposit. Geology and Prospecting 30(1), 58-62.
- Dianhao, H., and Chengyu, W. (1997): Geological and geochemical characteristics and ore-forming mechanism of the Caijiaying Pb-Zn-Ag deposit, Hebei Province, China. Dixue Yanjiu 29(30), 198-211.
- Wang Lijuan, Wang Jingbin, Wang Yuwang, and Zhu Heping (2004): Ore-forming fluid and mineralization of Caijiaying and Dajing polymetallic ore deposits. Science in China, Series D (Earth Sciences), 47(2), 97-107.
- Youli Feng, Lijing Yu, and Ruizhong Hu (2006): The characteristics of geological and altered rocks of Caijiaying Pb-Zn-Ag ore deposit. Journal of The Virtual Explorer 24(2).
- Zhaoshan Chang, White, N.C., Crowe, R.W.A., and Woodhouse, W. (2006): Caijiaying Mine, Hebei, China: An unusual Zn-Au deposit. Australian Earth Sciences Convention, Melbourne, July 2-6, 2006.
- Zhaoshan Chang, White, N.C., Crowe, R.W.A., Woodhouse, W., and Wilson, N. (2007): Unusual Zn-Au Mineralization at the Caijiaying Mine, Hebei, China. Symposium on Circum-Pacific Tectonics, Geologic Evolution, and Ore Deposits, Tucson (AZ), September 24-30, 2007.

Mineral List

Acanthite Actinolite Arsenopyrite Baryte Bismuth Bornite Calcite Chalcopyrite Chamosite var: Thuringite Chlorite Group var: Brunsvigite Clinochlore var: Ripidolite

Epidote Fluorite Freibergite Galena var: Argentiferous Galena Galenobismutite Gold var: Electrum Hedenbergite Hematite Heyrovskýite Illite

Ilvaite 'K Feldspar' 'var: Adularia' Magnetite Marcasite Molybdenite Muscovite var: Fuchsite var: Sericite Pyrargyrite Pyrite var: Arsenian Pyrite

Pyrrhotite Quartz var: Chalcedony Siderite Silver Sphalerite var: Marmatite Stephanite Stibnite Tetrahedrite var: Argentian Tetrahedrite Tremolite

47 entries listed. 34 valid minerals.