Dexing

Porphyry copper deposit in Jiangxi, China

Names and other identifiers

GMRAP ID 471
Tract name Coastal Pacific (142pCu8704)
Included sites Tongchang, Fujiawu, and Zhushahong
Site status deposit

Geographic location

Country China
State or province Jiangxi
Geographic location 117.730003357, 29.018899918
Geologic map unit 117.730003357, 29.018899918
Nearby data

Geologic information

Deposit type Porphyry copper
Age (Ma) 171Ma
Age determination method U-Pb zircon SHRIMP
Age range 171 ±3 Ma
Age reference Wang and others (2006)
Minerals arsenopyrite, azurite/malachite, bismuthinite, bornite, calaverite, cassiterite, chalcocite, chalcopyrite, cubanite
Associated rocks diabase porphyry, diorite porphyry, feldspar porphyry, granodiorite porphyry, gabbro, pyroxenite
Tectonic setting postconvergence
Stratigraphic age Middle Jurassic

Commodity and development information

Development status Producer
Major commodities Cu, Mo, Au
Tonnage (Mt) 1,825Mt
Cu grade (%) 0.459%
Mo grade (%) 0.016%
Au grade (g/t) 0.12g/t
Ag grade (g/t) 1.9g/t
Contained copper 8,380,000t
Gold-Moly ratio 7.5

Reference information

Comments Porphyry is related to Middle Jurassic Shi-Han intracontinental rift (Wang and others, 2006); compositions of plutons are ""adakitic"". Complex contains more than 10 Mt of Cu (Wang and others, 2006). Mining.
Study area name East Asia Mesozoic
References Argall (1981); Chen and Li (1990); Fan (1984); Ge and others (1990); He and others (1999); Li and Sasake (2007); Rui, Wang and Wang (2002b); Rui, Wang, Wu and others (2005); Yu (1981); Zhai and others (1997); Zhang and others (1993); Wang and others (2006); Singer and others (2008)
Site reference Ludington, Mihalasky, and others (2012)
Argall, G.O., Jr., 1981, Huge Chinese porphyry—Dexing operations and plans: World Mining, v.34, no. 1, p. 24–28.
Chen, C., and Li, G., 1990, Dexing copper mine: Mining Magazine, v. 162, no. 4, p. 287–288.
Fan, Pow-Foong, 1984, Geologic setting of selected copper deposits of China: Economic Geology, v. 79, p. 1785–1795. (Also available at http://dx.doi.org/10.2113/gsecongeo.79.8.1785.)
Ge Chaohua, Sun Haitian, and Zhou Taihe, 1990, Copper deposits of China, in Mineral deposits of China, v. 1: Beijing, Geological Publishing House, p. 1–106. [In Chinese.]
He, Wenwu; Bao, Zhengyu; and Li, Tiepeng, 1999, One-dimensional reactive transport models of alteration in the Tongchang porphyry copper deposit, Dexing district, Jiangxi province, China: Economic Geology, v. 94, no. 3, p. 307–323. (Also available at http://dx.doi.org/10.2113/gsecongeo.94.3.307.)Li, Xiaofeng, and Sasake, Munetake, 2007, Hydrothermal alteration and mineralization of Middle Jurassic Dexing porphyry Cu-Mo deposit, southeast China: Resource Geology, v. 57, no. 4, p. 409–426. (Also available at http://dx.doi.org/10.1111/j.1751-3928.2007.00032.x.)
Rui, Z., Wang, L., and Wang, Y., 2002b, Porphyry copper deposit models in China, in Workshop on Assessing Undiscovered Mineral Resources, Beijing, June 24–28, Proceedings: China Geological Survey and U.S. Geological Survey, p. 42–52.
Rui, Zongyao; Wang, Longsheng; Wu, Chengyu; Zhang, Lisheng; and Sun, Xinya, 2005, Dexing porphyry copper deposits in Jiangxi, China, in Porter, T.M., ed., Super porphyry copper and gold deposits—A global perspective: Adelaide, PGC Publishing, v. 2, p. 409–421. (Abstract also available at http://www.portergeo.com.au/publishing/superporphyry/Abstract094sp.asp.)Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.Wang, Qiang; Xu, Ji-Feng; Jian, Ping; Bao, Zhi-Wei; Zhao, Zhen-Huan; Li, Chao-Feng; Xiong, Xiao-Lin; and Ma, Jin-Long, 2006, Petrogenesis of adakitic porphyries in an extensional tectonic setting, Dexing, south China—Implications for the genesis of porphyry copper mineralization: Journal of Petrology, v. 47, no. 1, p. 119–144. (Also available at http://dx.doi.org/10.1093/petrology/egi070.)Yu, Chung-Wen, 1981, Mechanisms of ore formation and primary dispersion at the Dexing porphyry copper deposit, Jiangxi, and their implications in geochemical exploration: Journal of Geochemical Exploration, v. 15, p. 115–137. (Also available at http://dx.doi.org/10.1016/0375-6742(81)90059-5.)
Zhai, Y., Deng, J., and Peng, R., 1997, Some major mineral deposits in China—Their tectonic setting and deposit model characteristics, in Pei, Rongfu, ed., Energy and mineral resources for the 21st century—Geology of mineral deposits, mineral economics: International Geological Congress, 30th, Beijing, China, August 4–14, 1996 [Proceedings], v. 9: Utrecht, Netherlands, VSP, p. 367–379.
Zhang, Hongtao; Pei, Rongfu; and Wu, Liangshi, 1993, Evolution of the porphyry copper deposits from Proterozoic to Cenozoic Era in China, in International Geological Congress, 29th, Kyoto, Japan, August 24–September 3, 1992, Proceedings: Tokyo, Society of Resource Geology, Resource Geology Special Issue, no. 15, Mineral Resources Symposia Volume A, p. 55–65.