Abstract
The Eocene epoch in the Great Basin of western North America was a period of profuse magmatism and hydrothermal activity. During that period, the Carlin-type gold deposits in Nevada were produced, Earth’s second largest concentration of gold after deposits in South Africa. The characteristics of the Carlin-type deposits have been documented, but a widely acceptable explanation for their genesis is outstanding. Here we integrate microanalyses of ore minerals, experimental data that describe metal partitioning, and published age and isotopic data, to suggest that the gold is sourced from magma. We relate gold deposition to a change from shallow subduction to renewed magmatism and the onset of extension. We propose that upwelling asthenosphere impinged on a strongly modified subcontinental lithospheric mantle, generating magmas that released gold-bearing fluids at depths of 10 to 12 km. The rising aqueous fluids with elevated hydrogen sulphide concentrations and a high ratio of gold to copper underwent phase changes and mixed with meteoric water. Within a few kilometres of the surface, the fluids dissolved and sulphidized carbonate wall rocks, leading to deposition of gold-bearing pyrite. We conclude that the large number and size of Carlin-type deposits in Nevada is the result of an unusual convergence of a specific geologic setting, together with a tectonic trigger that led to extremely efficient transport and deposition of gold.
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References
Cline, J. S., Hofstra, A. H., Muntean, J. L., Tosdal, R. M. & Hickey, K. A. in Economic Geology 100th Anniversary Volume (eds Hedenquist, J. W., Thompson, J. F. H., Goldfarb, R. J. & Richards, J. P.) 451–484 (Society of Economic Geologists, 2005).
Heitt, D. G., Dunbar, W. W., Thompson, T. B. & Jackson, R. G. Geology and geochemistry of the Deep Star gold deposit, Carlin trend, Nevada. Econ. Geol. 98, 1107–1136 (2003).
Ressel, M. W. & Henry, C. D. Igneous geology of the Carlin trend, Nevada: Development of the Eocene plutonic complex and significance for Carlin-type gold deposits. Econ. Geol. 101, 347–383 (2006).
John, D. A., Henry, C. D. & Colgan, J. P. Magmatic and tectonic evolution of the Caetano caldera, north-central Nevada: A tilted, mid-Tertiary eruptive center and source of the Caetano tuff. Geosphere 4, 75–106 (2008).
Cline, J. S. & Hofstra, A. H. Ore fluid evolution at the Getchell Carlin-type gold deposit, Nevada, USA. Eur. J. Mineral. 12, 195–212 (2000).
Williams-Jones, A. E. & Heinrich, C. A. Vapor transport of metals and the formation of magmatic-hydrothermal ore deposits. Econ. Geol. 100, 1287–1312 (2005).
Simon, A. C. et al. Gold partitioning in melt-vapor-brine systems. Geochim. Cosmochim. Acta 69, 3321–3335 (2005).
Simon, A. C., Pettke, T., Candela, P. A., Piccoli, P. M. & Heinrich, C. A. Copper partitioning in a melt-vapor-brine-magnetite–pyrrhotite assemblage. Geochim. Cosmochim. Acta 70, 5583–5600 (2006).
Simon, A. C., Pettke, T., Candela, P. A., Piccoli, P. M. & Heinrich, C. A. The partitioning behavior of As and Au in S-free and S-bearing magmatic assemblages. Geochim. Cosmochim. Acta 71, 1764–1782 (2007).
Tosdal, R. M., Wooden, J. L. & Kistler, R. W. in Geology and Ore Deposits 2000: The Great Basin and Beyond (eds Cluer, J. K., Price, J. G., Struhsacker, E. M., Hardyman, R. F. & Morris, C. L.) 451–466 (Geological Societyof Nevada, 2000).
Marshak, S., Karlstrom, K. & Timmons, J. M. Inversion of Proterozoic extensional faults: An explanation for the pattern of Laramide and Ancestral Rockies intracratonic deformation, United States. Geology 28, 735–738 (2000).
Emsbo, P., Groves, D. I., Hofstra, A. H. & Bierlein, F. P. The giant Carlin gold province: A protracted interplay of orogenic, basinal, and hydrothermal processes above a lithospheric boundary. Min. Dep. 41, 517–525 (2006).
Muntean, J. L., Coward, M. P. & Tarnocai, C. A. in Deformation of the Continental Crust: The Legacy of Mike Coward 272 (eds Reis, A. C., Butler, R. W. H. & Graham, R. H.) 571–587 (Spec. Publ. Geol. Soc. Lond., 2007).
Coney, P. J. & Reynolds, S. J. Cordilleran Benioff zones. Nature 270, 403–406 (1977).
Iwamori, H. Transportation of H2O and melting in subduction zones. Earth Planet. Sci. Lett. 160, 65–80 (1998).
Candela, P. A. & Piccoli, P. M. in Economic Geology 100th Anniversary Volume (eds Hedenquist, J. W., Thompson, J. F. H., Goldfarb, R. J. & Richards, J. P.) 25–37 (Society of Economic Geologists, 2005).
Noll, P. D., Newsom, H. W., Leeman, W. P. & Ryan, J. G. The role of hydrothermal fluids in the production of subduction zone magmas: Evidence from siderophile and chalcophile trace elements and boron. Geochim. Cosmochim. Acta 60, 587–611 (1996).
Hattori, K. H. & Guillot, S. Volcanic fronts form as a consequence of serpentine dehydration in the forearc mantle wedge. Geology 31, 525–528 (2003).
Richards, J. P. Postsubduction porphyry Cu–Au and epithermal Au deposits: Products of remelting of subduction-modified lithosphere. Geology 37, 247–250 (2009).
Humphreys, E. et al. How Laramide-age hydration of North American lithosphere by the Farallon slab controlled subsequent activity in the western United States. Int. Geol. Rev. 45, 575–595 (2003).
Humphreys, E. D. Post-Laramide removal of the Farallon Slab, western United States. Geology 23, 987–990 (1995).
Kelley, K. A. & Cottrell, E. Water and the oxidation state of subduction zone magmas. Science 325, 605–607 (2009).
Gans, P. B., Mahood, G. A. & Schermer, E. Synextensional magmatism in the Basin and Range province: A case study from the eastern Great Basin. (Special Paper Vol. 233, Geological Society of America 1989).
Annen, C., Blundy, J. D. & Sparks, R. S. J. The genesis of intermediate and silicic magmas in deep crustal hot zones. J. Petrol. 47, 505–539 (2006).
Redmond, P. B., Einaudi, M. T., Inan, E. E., Landtwing, M. R. & Heinrich, C. A. Copper deposition from fluid cooling in intrusion-centered system: New insights from the Bingham porphyry ore deposit, Utah. Geology 32, 217–220 (2004).
Barnes, C. G., Burton, B. R., Burling, T. C., Wright, J. E. & Karlsson, H. R. Petrology and geochemistry of the late Eocene Harrison Pass pluton, Ruby Mountains core complex, northeastern Nevada. J. Petrol. 42, 901–929 (2001).
Henry, C. D. Ash-flow tuffs and paleovalleys in northeastern Nevada: Implications for Eocene paleogeography and extension in the Sevier hinterland, northern Great Basin. Geosphere 4, 1–35 (2008).
Driesner, T. & Heinrich, C. A. The system H2O–NaCl. Part I: Correlation formulae for phase relations in temperature–pressure-composition space from 0 to 1000 °C, 0 to 5000 bar, and 0 to 1 XNaCl . Geochim. Cosmochim. Acta 71, 4880–4901 (2007).
Seo, J. H., Guillong, M. & Heinrich, C. A. The role of sulfur in the formation of magmatic-hydrothermal copper–gold deposits. Earth Planet. Sci. Lett. 282, 323–328 (2009).
Heinrich, C. A., Driesner, T., Stefánsson, A. & Seward, T. M. Magmatic vapor contraction and the transport of gold from the porphyry environment to epithermal ore deposits. Geology 32, 761–764 (2004).
Henley, R. W. & McNabb, A. Magmatic vapor plumes and ground-water interaction in porphyry copper emplacement. Econ. Geol. 73, 1–20 (1978).
Giggenbach, W. F. Magma degassing and mineral deposition in hydrothermal systems along convergent plate boundaries. Econ. Geol. 87, 1927–1944 (1992).
Heinrich, C. A. The chemistry of hydrothermal tin-(-tungsten) ore deposition. Econ. Geol. 85, 457–481 (1990).
Simon, G., Kesler, S. E. & Chryssoulis, S. Geochemistry and textures of gold-bearing arsenian pyrite, Twin Creeks, Nevada: Implications for deposition of gold in Carlin-type deposits. Econ. Geol. 94, 405–422 (1999).
Reich, M. et al. Solubility of gold in arsenian pyrite. Geochim. Cosmochim. Acta 69, 2781–2796 (2005).
Hofstra, A. H. et al. Genesis of sediment-hosted disseminated gold deposits by fluid mixing and sulfidization: Chemical-reaction-path modeling of ore-depositional processes documented in the Jerritt Canyon district, Nevada. Geology 19, 36–40 (1991).
Barker, S. L. et al. Uncloaking invisible gold: Use of nanoSIMS to evaluate gold, trace elements and sulfur isotopes in pyrite from Carlin-type gold deposits. Econ. Geol. 104, 897–904 (2009).
Stenger, D. P., Kesler, S. E., Peltonen, D. R. & Tapper, C. J. Deposition of gold in Carlin-type deposits: The role of sulfidation and decarbonation at Twin Creeks, Nevada. Econ. Geol. 93, 210–215 (1998).
Widler, A. M. & Seward, T. M. The adsorption of gold(I) hydrosulfide complexes by iron sulphide surfaces. Geochim. Cosmochim. Acta 66, 383–402 (2002).
Robert, F., Poulsen, K. H., Cassidy, K. F. & Hodgson, C. J. in Economic Geology 100th Anniversary Volume (eds Hedenquist, J. W., Thompson, J. F. H., Goldfarb, R. J. & Richards, J. P.) 1001–1033 (Society ofEconomic Geologists, 2005).
Acknowledgements
This work was supported by the National Science Foundation (EAR awards 0635657 to J.L.M., 0635658 to J.S.C. and 0609550 to A.C.S.), the US Geological Survey’s Mineral Resources External Research Program, Placer Dome Exploration and Barrick Gold Corporation.
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J.L.M., J.S.C., A.C.S. and A.A.L. conceived the model for the CTGDs. J.L.M. took the lead in preparation of the manuscript and figures and contributed Supplementary Data S1. J.S.C. and A.A.L. contributed Supplementary Data S2 and A.C.S. contributed Supplementary Data S3.
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Muntean, J., Cline, J., Simon, A. et al. Magmatic–hydrothermal origin of Nevada’s Carlin-type gold deposits. Nature Geosci 4, 122–127 (2011). https://doi.org/10.1038/ngeo1064
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DOI: https://doi.org/10.1038/ngeo1064
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