JMMCE  Vol.2 No.2 , October 2003
Gold in the Jinya Carlin-type Deposit: Characterization and Implications
ABSTRACT
Gold in the Jinya Carlin-type deposit, assaying 6.27 g/t Au, was characterized using a comprehensive mineralogical and analytical approach which includes optical microscopy and several advanced microbeam techniques. Each gold carrier was quantified independently. Gold in the Jinya ore occurred as microscopic gold and submicroscopic gold. Submicroscopic gold, primarily in the form of solid solution gold, was carried mainly by arsenopyrite (accounting for 77% of the gold assay), and to a lesser extent (~16%) in arsenic-rich fine-grained and microcrystalline pyrite. Native gold accounted for 6% of the gold assay. Gold carried in cinnabar and rock minerals is insignificant. Gold deportment shows that (1) arsenopyritization and pyritization can be used as indication of mineralization for the further exploration in the Jinya district, and (2) gold in sulfides is not amenable to direct cyanidation, but can be recovered by flotation of a sulfide concentrate and then cyanidation with a pretreatment process.

Cite this paper
Y. Zhou and K. Wang, "Gold in the Jinya Carlin-type Deposit: Characterization and Implications," Journal of Minerals and Materials Characterization and Engineering, Vol. 2 No. 2, 2003, pp. 83-100. doi: 10.4236/jmmce.2003.22008.
References
[1]   Arehart, G.B., Chryssoulis, S.L., and Kesler, S.E. (1993): Gold and arsenic in iron sulfides from sediment-hosted micron gold deposits: Implications for depositional processes. Econ. Geol., Vol. 88, 171-185.

[2]   Bakken, B.M., Hochella, M.F., Jr., Marshall, A.F. & Turner, A.M. (1989): High-resolution microscopy of gold in unoxidized ore from the Carlin mine, Nevada. Econ. Geol. Vol. 84, 171-179.

[3]   Bakken, B.M., Fleming, R.H., and Hochella, M.F., Jr. (1991): High-resolution microscopy of auriferous pyrite from the Post deposit, Carlin district, Nevada. In: Process Mineralogy XICharacterization of metallurgical and recycable products, Hausen, D.M., Petruk, W., Hagni, R.D., and Vassiliou, A., eds., Washington, D.C., TMS, p. 13-23.

[4]   Boyle, R.W. (1979): The geochemistry of gold and its deposits. Geol. Survey of Canada, Bull. 280.

[5]   Cabri, L.J., Chryssoulis, S.L., DE Villiers, J. P.R., Laflamme, J.H.G., and Buseck, R. (1989): The nature of “invisible” gold in arsenopyrite. Can. Mineral., Vol. 27, 353-362.

[6]   Chryssoulis, S.L., Cabri, L.J., and Salter, R.S. (1987): Direct determination of invisible gold in refractory sulfide ores. International Symposium on Gold Metallurgy – Refractory Gold, Toronto, Ontario, February 1987, Proceedings, 235-244.

[7]   Chryssoulis, S.L., Cabri, L.J., and Lennard, W. (1989): Calibration of the ion microprobe for quantitative trace precious metal analyses of ore minerals. Econ. Geol., Vol. 84, 1684-1689.

[8]   Chryssoulis, S.L. and Cabri, L.J. (1990): Significance of gold mineralogical balance in mineral processing. Trans. Instn. Min. Metall., Sec. C: Mineral Process. Extr. Metall. 99, T.T., C1-C10.

[9]   Cook, N.J. and Chryssoulis, S.L. (1990): Concentrations of “invisible gold” in the common sulfides. Can. Minerl. Vol. 28, 1-16.

[10]   Hausen, D.M. (1981): Process mineralogy of auriferous pyritic ores at Carlin, Nevada. In Hausen, D.M., and Park, W.C., eds., Process Mineralogy, TMS, Warrendale, PA, 271-289.

[11]   Hausen, D.M., Ahlrichs, J.W., Mueller, W., and Park, W.C. (1986): Particulate gold occurrences in three Carlin carbonaceous ores. In Process Mineralogy VI, ed. D. Hagni, TMS, Warrendale, PA, 193-214.

[12]   Healy, R.E. and Petruk, W. (1990): Petrology of Au-Ag-Hg alloy and ‘invisible gold’ in the Trout Lake massive sulfide deposit, Flin Flon, Manitoba. Can. Mineral., Vol. 28, 2, 189-206.

[13]   Hofstra, A.H., and Cline, J.S. (2000): Characteristics and models for Carlin-type gold deposits. Reviews in Economic Geology, Vol. 13, p. 163-220.

[14]   Jory, J. (2002): Stratigraphy and host rock controls of gold deposits of the northern Carlin trend. Nevada Bureau of Mines and Geology, Bulletin 111: Gold Deposits of the Carlin Trend, 20-34.

[15]   Kerrich, R., Golsfarb, R., Groves, D., and Garvin, S. (2000): The geodynamics of world-class gold deposits: characteristics, space-time distribution, and origins. Reviews in Economic Geology, Vol. 13, p. 501-551.

[16]   Liu, D.S. (1994): The Carlin-type gold deposits in China. Nanjing University Press, Nanjing, pp. 414.

[17]   Neumayr, P., Cabri, L.J., Groves, D.I., Mikucki, E.J., and Jackman, J.A. (1993): The mineralogical distribution of gold and relative timing of gold mineralization in two Archean settings of high metamorphic grade in Australia. Can. Mineral., Vol. 31, 711-725.

[18]   Peters, S.G. (editor) (2002): Geology, geochemistry, and geophysics of sedimentary-hosted Au deposits in P.R. China. USGS Open-File Report: 02-131.

[19]   Petruk, W. (2000): Applied mineralogy in the mining industry. Elsevier, Amsterdam. Radtke, A.S. (1985): Geology of the Carlin gold deposit, Nevada. U.S. Geological Survey Professional Paper 1267, 124 p.

[20]   Simon, G., Kesler, S.E. and Chryssoulis, S.L. (1999): Geochemistry and Textures of Gold-bearing Arsenian Pyrite, Twin Creeks, Nevada: Implications for deposition of gold in Carlin-type deposits. Econ. Geol. Vol. 94, 405-422.

[21]   Teal, L. and Jackson, M. (2002): Geologic overview of the Carlin Trend gold deposits. Nevada Bureau of Mines and Geology, Bulletin 111: Gold Deposits of the Carlin Trend, 9-19.

[22]   Wan, R.Y. (2001): Importance of metallurgical research on refractory gold processing. Mining Engineering, SME, November, p. 41-46.

[23]   Wang, K.R., Zhou, Y.Q., Li, F., Sun, L., Wang, J., Ren, C.G., Zhou, S.J., Tang, J.Y., and Yang, F.J. (1992): SPM and SEM study on the occurrence of micrograined gold in the Jinya gold deposit, Guangxi. Chinese Science Bulletin, Vol. 37, 1906-1910.

[24]   Wang, K.R. and Zhou, Y.Q. (1993): Invisible gold in sulfide ores from Jinya Carlin-type gold deposit, south China. Resource Geology Special Issue, No. 16, 314-318.

[25]   Wang, K.R., Zhou, Y.Q., Sun, L.G. and Ren, C.G. (1994): Study on the gold occurrence from several typical Carlin-type gold deposits in China. Publishing House of University of Science & Technology of China, Hefei.

[26]   Wells, J.D. and Mullens, T.E. (1973): Gold-bearing arsenian pyrite determined by microprobe analyses, Cortez and Carlin mines, Nevada. Econ. Geol., Vol. 68, 187-201.

[27]   Yakubchuk, A. (2000): Regional structure similarities of Carlin-type gold mineralization in Nevada, Siberia and South China: a comparison. In Cluer, J.K., Price, J.G.,Struhsacker, E.M., Hardyman, R.F., and Morris, C.L., eds., Geology and Ore Deposits 2000: The Great Basin and Beyond, Geol. Society of Nevada Symposium Proceedings, Vol. 1, 549-561.

 
 
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