Geometallurgy of the Pebble porphyry copper-gold-molybdenum deposit, Alaska: Implications for gold distribution and paragenesis

Economic Geology

Volumn 108, Issue 3, 2013, Pages 463-482

  Gregory, Melissa J ^a,f   Lang, James R ^b   Gilbert, Sarah ^c   Hoal, Karin Olson ^d,e  

^a Pebble Limited Partnership   (United States)

^b HUNTER DICKINSON INC   (Canada)

^c UNIVERSITY OF TASMANIA   (Australia)

^d Department of Geology and Geological Engineering   (United States)

^e JK Tech Pty Ltd   (United States)

^f UNIVERSITY OF BRITISH COLUMBIA   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

ARGILLIC ALTERATION ZONE; COPPER CONCENTRATION; HYDROTHERMAL ALTERATION ASSEMBLAGES; HYDROTHERMAL ALTERATIONS; MAGMATIC-HYDROTHERMAL SYSTEMS; SPATIAL AND TEMPORAL VARIATION; TEMPERATURE EVOLUTION; TRACE ELEMENT COMPOSITION;

CLAY ALTERATION; COPPER; CRYSTALLOGRAPHY; DEPOSITS; ECONOMIC GEOLOGY; ELECTROMAGNETIC INDUCTION; GOLD; GOLD COMPOUNDS; KAOLINITE; LASERS; MINERALOGY; MOLYBDENUM DEPOSITS; PALLADIUM; PALLADIUM COMPOUNDS; QUARTZ; RECRYSTALLIZATION (METALLURGY); SCANNING ELECTRON MICROSCOPY; SILICATE MINERALS; SILVER; SULFIDE MINERALS; TEMPERATURE; TRANSPORT PROPERTIES; VAPORS;

GOLD DEPOSITS;

CHALCOPYRITE; CHEMICAL COMPOSITION; CONCENTRATION (COMPOSITION); COPPER; ECONOMIC GEOLOGY; FLUID COMPOSITION; GEOLOGICAL MAPPING; GOLD; HYDROTHERMAL ACTIVITY; HYDROTHERMAL ALTERATION; METALLURGY; METEORIC WATER; MINERAL DEPOSIT; MINERAL PROCESSING; MINERAL RESOURCE; MINERALOGY; MOLYBDENUM; PARAGENESIS; PEBBLE; PORPHYRY; PYRITE; RECRYSTALLIZATION; SILICATE MINERAL;

ALASKA; UNITED STATES;

EID: 84876867780     PISSN: 03610128     EISSN: None     Source Type: Journal    
DOI: 10.2113/econgeo.108.3.463     Document Type: Article

References (28)

1. Arif, J., and Baker, T., 2004, Gold paragenesis and chemistry at Batu Hijau, Indoneisa: Implications for gold-rich porphyry copper deposits: Mineralium Deposita, v. 39, p. 523-535. (Pubitemid 39474007)
2. Burnham, C.W., 1979, Magmas and hydrothermal fluids in, Barnes, H.L., ed., Geochemistry of hydrothermal ore deposits, 2nd ed.: New York, John Wiley and Sons, p. 71-136.
3. Cuddy, A.S., and Kesler, S.E., 1982, Gold in the Granisle and Bell Copper porphyry copper deposits, British Columbia: Association of Exploration Geochemists Special Publication 10, p. 139-156.
4. Cygan, G.L., and Candela, P.A., 1995, Preliminary study of gold partitioning among pyrrhotite, pyrite, magnetite, and chalcopyrite in the gold-saturated chloride solutions at 600°-700°C, 140 mpa (1,400 bars): Mineralogical Association of Canada Short Course, v. 23, p. 129-137.
5. Danyushevsky, L.V., Robinson, P., Gilbert, S., Norman, M., Large, R., Mc-Goldrick, P., and Shelley, J.M.G., 2011, Routine quantitative multi-element analysis of sulfide minerals by laser ablation ICP-MS: Standard development and consideration of matrix effects: Geochemistry: Exploration, Environment, Analysis, v. 11, p. 51-60.
6. Dunham, S., and Vann, J., 2007, Geometallurgy, geostatistics and project value - does your model tell you what you need to know?: Project Evaluation Conference, Melbourne, Victoria, Australasian Institute of Mining and Metallurgy, Melbourne, Proceedings, p. 189-196.
7. Foster, A.R., Williams, P.J., and Ryan, C.G., 2007, Distribution of gold in hypogene ore at the Ernest Henry iron oxide copper-gold deposit, Cloncurry district, NW Queensland: Exploration and Mining Geology, v. 16, p. 125-143.
8. Gammons, C.H., and Williams-Jones, A.E., 1995, Hydrothermal geochemistry of electrum: Thermodynamic constraints: ECONOMIC GEOLOGY, v. 90, p. 420-432. (Pubitemid 26458085)
9. -1997, Chemical mobility of gold in the porphyry-epithermal environment: ECONOMIC GEOLOGY, v. 92, p. 45- 59.
10. Gregory, M.J., and Lang, J.R., 2009, Hydrothermal controls on copper sulphide speciation, metal distribution and gold deportment in the Pebble porphyry Cu-Au-Mo deposit, southwest Alaska: Smart Science for Exploration and Mining, Biennial SGA Meeting, 10th, Townsville, Australia, Proceedings p. 524-526.
11. -2011, Controls on Au deportment in the Pebble Cu-Au-Mo porphyry deposit, Alaska: Let's Talk Ore Deposits, Biennial SGA Meeting, 11th, Antofagasta, Chile, Proceedings, p. 962-964.
12. Harraden, C.L., McNulty, B.A., Gregory, M.J., and Lang, J.R., 2013, Shortwave infrared spectral analysis of hydrothermal alteration associated with the Pebble porphyry copper-gold-molybdenum deposit, Iliamna, Alaska: Implications for gold distribution and paragenesis: ECONOMIC GEOLOGY, v. 108, p. 483-494.
13. Hedenquist, J.W., Arribas, A., Jr., and Reynolds, T.J., 1998, Evolution of an intrusion-centered hydrothermal system: Far Southeast-Lepanto porphyry and epithermal Cu-Au deposits, Philippines: ECONOMIC GEOLOGY, v. 93, p. 373-404. (Pubitemid 28453923)
14. Hoal, K.O., 2008, Getting the Geo into Geomet: SEG Newsletter 73, p. 11-15.
15. Huston, D.L., Sie, S.H., Suter, G.F., Cooke, D.R., and Both, R.A., 1995, Trace elements in sulfide minerals from eastern Australian volcanic-hosted massive sulfide deposits: Pt. I. Proton microprobe analyses of pyrite, chalcopyrite, and sphalerite, and Pt. II. Selenium levels in pyrite: Comparison with 34S values and implications for the source of sulfur in volcanogenic hydrothermal systems: ECONOMIC GEOLOGY, v. 90, p. 1167-1196. (Pubitemid 26461600)
16. Kesler, S.E., Chryssoulis, S.L., and Simon, G., 2002, Gold in porphyry copper deposits: Its abundance and fate: Ore Geology Reviews, v. 21, p. 103-124.
17. Lang, J.R., Rebagliati, C.M., Roberts, K., and Payne, J.G., 2008, The Pebble copper-gold-molybdenum porphyry deposit, south-west Alaska, USA: PacRim Congress 2008, Conference Proceedings, p. 27-32.
18. Lang, J.R., Gregory, M.J., Rebagliati, C.M., Payne, J.G, Oliver, J.L., and Roberts, K., 2013, Geology and magmatic-hydrothermal evolution of the Giant Pebble porphyry copper-gold-molybdenum deposit, southwest Alaska: ECONOMIC GEOLOGY, v. 108, p. 437-462.
19. Large, R., Danyushevsky, L., Hollit, C., Maslennikov, V., Meffre, S., Gilbert, S., Bull, S., Scott, R., Emsbo, P., Thomas, H., Singh, B., and Foster, J., 2009, Gold and trace element zonation in pyrite using a laser imaging technique: Implications for the timing of gold in orogenic and Carlin-style sediment-hosted deposits: ECONOMIC GEOLOGY, v. 104, p. 635-668.
20. Pebble Limited Partnership, 2010, Updated mineral resource estimate for Pebble Prospect February 1st 2010 news release (www.pebblepartnership.com).
21. Pokrovski, G.S., Borisova, A.Y., and Harrichoury, J., 2008, The effect of sulfur on vapor-liquid fractionation of metals in hydrothermal systems: Earth and Planetary Science Letters, v. 266, p. 345-362.
22. Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Investigation Series Map I-1174, 15 p.
23. Scaini, M.J., Bancroft, G.M., and Knipe, S.W., 1998, Reactions of aqueous Au+1 sulfide species with pyrite as a function of pH and temperature: American Mineralogist, v. 83, p. 316-322.
24. Seedorff, E., Dilles, J.H, Proffett, J.M., Jr., Einaudi, M.T., Zurcher, L., Stavast, W.J.A., Johnson, D.A., and Barton, M.D., 2005, Porphyry deposits: Characteristics and origin of hypogene features: ECONOMIC GEOLOGY 100TH ANNIVERSARY VOLUME, p. 251-298.
25. Sillitoe, R.H., 2000, Gold-rich porphyry copper deposits: Descriptive and genetic models and their role in exploration and discovery: Reviews in Economic Geology, v. 13, p. 315- 344.
26. Simon, G., Kesler, S.E., Essene, E.J., and Chryssoulis, S.L., 2000, Gold in porphyry copper deposits: Experimental determination of the distribution of gold in the Cu-Fe-S-Au system at 400° to 700°C: ECONOMIC GEOLOGY, v. 95, p. 259-270. (Pubitemid 30329812)
27. Tracy, B.J., 2001, Geology and ore fluid geochemistry of the Pebble Cu-Au porphyry deposit, southwest Alaska: Unpublished M.Sc. thesis, Athens, Georgia, University of Georgia, 148 p.
28. Williams-Jones, A.E., and Heinrich, C.A., 2005, Vapor transport of metals and the formation of magmatic-hydrothermal ore deposits: ECONOMIC GEOLOGY, v. 100, p. 1287-1312.