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Contact Information

• Email: arehart@unr.edu
• Phone: (775) 784-6470
  (775) 784-6970
• Office: Paul Laxalt Mineral Research Room 372

Degrees

• Ph.D. 1991, U Michigan
• M.S. 1978, Colorado State
• B.S. 1975, Colorado State

Biography

During the past 35 years as a professional geologist, I have pursued my research in a variety of locations. Much of my field time has been spent in western North America, including several years in Nevada working on Carlin-type deposits, both in regional exploration efforts and in detailed research efforts.

In addition, I was a mine geologist at Climax for two years and spent three years in Alaska doing regional exploration. Before coming to the University of Nevada, I spent three years in New Zealand studying volcanic and geothermal systems and epithermal gold deposits.

Although much of my present research is geochemical in nature, it is based on fieldwork, and attempts to solve problems that were generated in the field. Understanding of field relations is of paramount importance for laboratory or experimental studies.

When not pursuing geological topics, much of my spare time is spent with aviation.  I've been a pilot since 1979 and recently (2008) built my own airplane (in my garage) which I utilize to travel to field sites in western North America (I've taken it to places ranging from Texas to the Yukon).  I also enjoy skiing (Telemark and cross-country) as well as hiking.

• Classes
• Grants

Research Areas:

My research encompasses geochemical approaches to geological problems, particularly applications of both stable and radiogenic isotope geochemistry to problems of ore deposits, petrology, and fluid-rock interaction.  Much of my current research focuses on Carlin-type and porphyry-epithermal mineral deposits, both in the Great Basin and worldwide at a variety of scales.  I am also involved in crustal-scale isotope studies, utilizing stable isotopes in conjunction with other geochemical measures to elucidate crustal architecture. My work has been supported through grants from NSF, DOE, USGS, NATO and private industry.

More About Research

Relevant Past Experience:

Developed and funded the acquisition of the Nevada Stable Isotope Laboratory and acted as Director for 10 years; Research Scientist at the Institute of Geological and Nuclear Sciences, New Zealand, 3 years; Postdoctoral Fellow at Argonne National Laboratory, University of Chicago, Illinois, 3 years; 9 years working for various mining companies and as an independent consulting geologist (which I continue to do on a sporadic basis) in various locations worldwide.

University Experience

My primary teaching responsibilities at the University of Nevada include introductory and advanced courses in Economic Geology and Isotope Geochemistry as well as field courses (including Directing our Summer Field Camp). Two important skills I hope to embody in my teaching are communication and critical thinking, in a geological context. Critical thinking skills are necessary for sorting the useful from the non-useful, for reading others' work with a discriminating eye when comparing contrasting ideas.

In my courses, I emphasize excelling in both writing and speaking skills. Finally, while it is important to direct students toward current job markets, that should not be done to the detriment of a broad general education in geology. Those who have been successful in making job transitions between different areas of geology are those who have a solid, varied background. I make all of my students aware of this, and encourage a broad education. For a more complete description of the courses in which I am involved see the link above.

Publications

• Boztug, D., Harlavan, Y., Arehart, G., Satir, M. and Avci, N., 2007, K-Ar age, whole-rock and isotope geochemistry of A-type granitoids in the Divrigi-Sivas region, eastern-central Anatolia, Turkey, Lithos, in press.
• Boztug, D., Arehart, G.B., Platevoet, B., Harlavan, Y., and Bonin, B., 2007, K-Ar cooling age, mineral, wholerock and stable isotope geochemistry of the post-collisional I-type granitoids from the composite Yozgat batholith, central Anatolia, Turkey; Journal of Asian Earth Sciences, in press.
• Boztug, D. and Arehart, G.B., 2007, Oxygen and sulfur isotope geochemistry revealing a significant crustal signature in the genesis of the post-collisional granitoids in central Anatolia, Turkey; Journal of Asian Earth Sciences, in press.
• Ucurum, A., Lechler, P., Arehart, G.B., and Molnar, F., 2007, Platinum-Group Element, Stable Isotope, and Fluid Inclusion Investigation of the Ultramafic Rock-Hosted Gunes-Sogucak Ni-Cu-Sulfide Mineralization, Gunes Ophiolite, East-Central Turkey; International Geology Reviews, v. 49, p. 169-192.
• Arehart, G.B. and Donelick, R.A., 2006, Thermal and isotopic profiling of the Pipeline hydrothermal system: Application to exploration for Carlin-type gold deposits; Journal of Geochemical Exploration, v. 91, p. 27-40.
• *Arehart, G.B., 2005, The role of carbon in the genesis of Carlin-type gold deposits; Geological Society of Nevada Symposium 2005.
• Coolbaugh, M.F., Arehart, G.B., Faulds, J.E. and Garside, L.J, 2005, Geothermal systems in the Great Basin, western United States: Modern analogues to the roles of magmatism, structure, and regional tectonics in the formation of gold deposits; in Rhoden, H.N., Steininger, R.C. and Vikre, P.G., editors, Geological Society of Nevada Symposium 2005: Window to the World, p. 1063-1081.
• *Boztug, D., Harlavan, Y., Arehart, G.B., and Avci, N., 2005, K-Ar age, whole-rock and stable isotope geochemistry of A-type granitoids in the Divrigi-Sivas region, eastern-central Anatolia, Turkey; 2005 Goldschmidt Conference.
• Leavitt, E.D. and Arehart, G.B., 2005, Alteration, geochemistry and paragenesis of the Midas epithermal gold-silver deposit, Elko County, Nevada; in Rhoden, H.N., Steininger, R.C. and Vikre, P.G., editors, Geological Society of Nevada Symposium 2005: Window to the World, p. 563-627.
• Onal, A., Boztug, D., Kurum, S., Harlavan, Y., Arehart, G.B. and Arslan, M., 2005, K-Ar age determination, whole-rock and oxygen isotope geochemistry of the post-collisional Bizmişen and Calti plutons, SW Erzincan, Eastern Central Anatolia, Turkey; Geological Journal, v. 40, p. 1-20.
• Schmauder, G., Arehart, G.B., and Donelick, R.A., 2005, Thermal and chemical profiling of the Bald Mountain district, White Pine County, Nevada; in Rhoden, H.N., Steininger, R.C. and Vikre, P.G., editors, Geological Society of Nevada Symposium 2005: Window to the World, p. 531-542.
• Shevenell, L., Coolbaugh, M., Faulds, J., Oppliger, G., Calvin, W., Blewitt, G., Kratt, C., Arehart, G., Sladek, C., Lechler, P., Garside, L., and Zehner, R., 2005, Accomplishments at the Great Basin Center for Geothermal Energy; in Rhoden, H.N., Steininger, R.C. and Vikre, P.G., editors, Geological Society of Nevada Symposium 2005: Window to the World, p. 1063-1081.
• *Yilmaz, H., Oyman, T., Colakoglu, A.R., Arehart, G.B. and Billor, Z., 2005, Geochemistry and stable isotopes of the rift-related quartz-adularia-type gold-silver mineralization, Izmir, Turkey; Association of Exploration Geochemists Annual Conference, Perth, Australia.
• *Arehart, G.B., 2004, Designing a National Park: Discussions of Issues Surrounding National Parks; GSA Abstracts with Programs, v. 36, p. 488.
• Boztug, D. and Arehart, G.B., 2004, O and S isotope geochemistry of some S-I-A granitoids derived from the syn- to post-collisional stages of the Neo-Tethyan convergence system in central Anatolia, Turkey, International Symposium on Earth Systems, Istanbul, 2004.
• *Johnston, M.K. and Arehart, G.B., 2004, Wallrock alteration associated with the Chukar Footwall Carlin-type deposit, Eureka County, Nevada; GSA Abstracts, v. 36, p. 23.
• Leavitt, E.D., Spell, T.L, Wallace, A.R., Goldstrand, P.M., and Arehart, G.B., 2004, Geochronology of the Midas low-sulfidation epithermal gold-silver deposit, Elko County, Nevada; Economic Geology, v. 99, p. 1665-1686.
• Rosen, Michael R., Arehart, Greg B., and Lico, Michael, 2004, Exceptionally fast growth rate of
• Shevenell, L., Coolbaugh, M.F., Faulds, J., Oppliger, G., Calvin, W. Louie, J., Glewitt, G., Kratt, C., Arehart, G.B., Sladek, C., Lechler, P., and Garside, L., 2004, Accomplishments at the Great Basin Center for Geothermal Energy; Geothermal Resources Council Transactions, v. 28, p. 47-52.
• Sladek, C., Arehart, G.B., and Benoit, W.R., 2004, Geochemistry of the Lake City geothermal system, California, USA; Geothermal Resources Council Transactions, v. 28, p. 363-368.
• *Tretbar, D., Arehart, G.B. and Graves, R., 2004, Preg-robbing carbon in the processing of gold-bearing ores: definitions, analytical methodology, and characterization; GSA Abstracts, v. 36, p. 23.
• *Arehart, G.B., 2003, The Origin of Carlin-type Gold Deposits, Abstract volume, Geological Association of Canada meeting, St. Johns, NL, p. 16.
• Arehart, G.B., Chakurian, A.M., Tretbar, D.R., Christensen, J.N., Donelick, R.A. and McInnes, B.A., 2003, Evaluation of radioisotope dating of Carlin-type deposits in the Great Basin, western North America, and implications for deposit genesis; Economic Geology, v. 98, p. 235-248.
• Arehart, G.B., Coolbaugh, M.F., and Poulson. S.R., 2003, Evidence for a magmatic source of heat for the Steamboat Springs geothermal system using trace elements and gas geochemistry: Geothermal Resources Council Transactions, v 27, p. 269-274.
• Chakurian, A.M., Arehart, G.B., Donelick R.A., Zhang, X., and Reiners, P.W. 2003, Timing Constraints of Gold Mineralization Along the Carlin Trend Utilizing Apatite Fission-Track, 40Ar/39Ar, and Apatite (U-Th)/He; Economic Geology, v. 98, p. 1159-1171.
• *Leavitt, E.D., Arehart, G.B., and Spell, T., 2003, Volcano-tectonic Setting of the Midas Epithermal Vein Deposit, Elko County, Nevada; Geological Society of America Cordilleran Section meeting, Puerto Vallarta, Mexico.
• *Tosdal, R.M., Hickey, K.A., Donelick, R.A., Arehart, G.B. and Chakurian, A.M., 2003, Distinguishing hydrothermal events using apatite fission-track thermochronology: Implications for Au mineralisation in the Carlin-Jerritt Canyon region, northern Nevada; GSA Abstracts Annual Meeting.
• Arehart, G.B., Christenson, B.W., Wood, C.P., Foland, K.A. and Browne, P.R.L., 2002, Timing of Volcanic, Plutonic and Geothermal Activity at Ngatamariki, New Zealand: Implications for the Lifetimes of Geothermal Systems; Journal of Volcanology and Geothermal Research, v. 116, p. 201-214.
• *Arehart, G.B. and Muntean, J.L., 2002, The link between bedded barite and Carlin-type gold deposits in Nevada; GSA Abstracts Annual Meeting.
• *Graves, R.L. and Arehart, G.B., 2002, Sulfidation, adsorption, or unknown arsenic ligand? Unraveling the mysteries of Carlin-type deposits; GSA Abstracts Annual Meeting.
• *Buchanan, N.S. and Arehart, G.B., 2002, Developing a spatial and temporal model of carbonate vein characterization in and around Carlin-type gold deposits; GSA Abstracts Annual Meeting.
• *Derby, M., Pearlman, A., Arehart, G.B. and Poulson, S.R., 2002, Isotopic evolution of water in a Sierra snowpack; GSA Abstracts Annual Meeting.
• Arehart, G.B., Coolbaugh, M.F., and Poulson. S.R., 2002, Geochemical characterization of geothermal systems in the Great Basin: Implications for exploration, exploitation, and environmental issues: Geothermal Resources Council Transactions, v. 26, p. 479-481.
• Lechler, P.J., Arehart, G.B., and Knight, M., 2002, Multielement and Isotopic Geochemistry of the J-M Reef, Stillwater Intrusion, Montana; 9th International Platinum Symposium, Billings MT, July 2002.
• Shevenell, L., L. Garside, G. Arehart and B.M. Kennedy, 2002, Geochemical Sampling of Thermal and Nonthermal Waters in Nevada to Evaluate the Potential for Resource Utilization; Geothermal Resources Council Transactions, v. 26, p. 501-505.
• *Solomon, E.A., Poulson, S.R., Tempel, R.N. and Arehart, G.B., 2001, Geochemistry and chemical dynamics of the Truckee River Basin; GSA Rocky Mtn Section Meeting.
• Ucurum, A, Arehart, G.B. and Lechler, P.J., 2001, 32S/34S isotope ratios of Gunes-Sogucak sulfide-calcite-quartz vein at Divrigi in Sivas Province, east-central Turkey; Turkish Geological Congress, Adana.
• Arehart, G.B. and Poulson, S.R., 2001, Hydrothermal systems as indicators of paleoclimate: an example from the Great Basin, western North America; Proceedings of the 10th International Symposium on Water-Rock Interaction, Balkema, p. 87-90.
• Shannon, W.M., Wood, S.A., Brown, K. and Arehart G.B., 2001, REE contents and speciation in geothermal fluids from New Zealand; Proceedings of the 10th International Symposium on Water-Rock Interaction, Balkema, p. 1001-1004.
• Leavitt, E.D., Goldstrand, P., Schmidt, K., Wallace, A.R., Spell, T. and Arehart, G.B., 2000, Geochronology of the Midas gold-silver deposit and its relationship to volcanism and mineralization along the Northern Nevada Rift; Geological Society of Nevada Symposium Field Trip Guidebook 8, p. 157-162.
• *Arehart, G.B., Tretbar, D., Chakurian, A., Christensen, J.N. Donelick, R., Zhang, X., and Foland, K.A., 2000, Review of the age of Carlin-type Deposits in the Great Basin and implications for their formation; Geological Society of Nevada Symposium 2000.
• Arehart, G.B., Thompson, T.B., Tosdal, R.W., Poulson, H.C. and Brown, D., 2000, Geology of Carlin-type Ore Deposits in Nevada;Mineral Deposits Research Unit, University of British Columbia (2-day short course attended by 77 geologists from around the world).
• *Arehart, Greg B., Tretbar, David, and Lechler, Paul, 2000, Laser ablation ICPMS characterization of elemental chemistry of galkhaite, a Hg-Cs-Tl sulfosalt from Getchell, USA; 31st International Geological Congress.
• Simmons, S.F., Arehart, G.B., Simpson, M.P. and Mauk, J.L., 2000, Origin of massive calcite veins in the Golden Cross, low sulfidation epithermal Au-Ag deposit, New Zealand; Economic Geology, v. 95, p. 99-112.
• Tretbar, D., Arehart, G.B., and Christensen, J., 2000, Dating gold deposition in a Carlin-type gold deposit using Rb/Sr methods on the mineral galkhaite; Geology, v. 28, p. 947-950.
• Arehart, G.B., 1999, Geochemistry of Carlin-type gold deposits in the Great Basin, USA, Chinese Science Bulletin, v. 44, p. 240-242.
• Arehart, G.B., 1998, Isotopic signature of hydrothermal sulfates from Carlin-type ore deposits; in Arehart, G.B. and Hulston, J.R., (editors), Proceedings of the 9th International Symposium on Water-Rock Interaction, Balkema, p. 517-520.
• Christenson, B.W., Wood, C.P., and Arehart, G.B., 1998, Shallow magmatic degassing: processes and PTX constraints for paleo-fluids associated with the Ngatamariki diorite intrusion, New Zealand; in Arehart, G.B. and Hulston, J.R., (editors), Proceedings of the 9th International Symposium on Water-Rock Interaction, Balkema, p. 435-438.
• Arehart, G.B., Wood, C.P., Christenson, B.W., Browne, P.R.L., and Foland, K.A., 1997, Timing of volcanism and geothermal activity at Ngatamariki and Rotokawa, New Zealand; Proceedings of the 19th New Zealand Geothermal Workshop, p. 117-122.
• Christenson, B.W., Mroczek, E.K., Wood, C.P., and Arehart, G.B., 1997, Magma-ambient production environments: PTX constraints for paleo-fluids associated with the Ngatamariki diorite intrusion; Proceedings of the 19th New Zealand Geothermal Workshop, p. 87-92.
• Mroczek, E.K., White, S.P., Graham, D., and Arehart, G.B., 1997, Deposition of silica in porous packed beds - predicting the lifetime of reinjection aquifers; Proceedings of the 19th New Zealand Geothermal Workshop, p. 99-104.
• Arehart, G.B., 1996, Characteristics and origin of sediment-hosted disseminated gold deposits: A review; Ore Geology Reviews, v. 11, p. 383-403.
• Arehart, G.B., Christenson, B.W., Lindsay, J.M., Simpson, C.R.J., Simpson, M.P., Simmons, S.F., and Mauk, J.L., 1996, Paleohydrology of the Golden Cross Vein System; Proceedings of the 18th New Zealand Geothermal Workshop, 163-168.
• Fischer, TP, Arehart, G.B., Sturchio, N.C. and Williams, S.N., 1996, The relationship between fumarole gas composition and eruptive activity at Galeras Volcano, Colombia; Geology, v. 24, p. 531-534.
• Sturchio , N.C., Ohsawa, S., Sano, Y., Arehart, G., Kitaoka, K. and Yusa, Y., 1996, Geochemical characteristics of the Yufuin outflow plume, Beppu hydrothermal system, Japan; Geothermics, v. 25, p. 215-230.
• Arehart, G. B., Sturchio, N.C., Fischer, T.P., and Williams, S.N., 1995, Gas chemistry and isotopic signature of fumaroles and Galeras Volcano, Colombia; Proceedings of the Pacrim '95 Conference, p. 19-24.
• Panther, C.A., Mauk, J.L., and Arehart, G.B., 1995, A petrographic and oxygen isotope study of banded epithermal veins from the Martha Hill Au-Ag mine, Coromandel Peninsula, New Zealand; Proceedings of the Pacrim '95 Conference, p. 447-452.
• Simpson, C.R.J., Mauk, J.L., Arehart, G.B., and Mathews, S.J., 1995, The formation of banded epithermal quartz veins at the Golden Cross Mine, Waihi, Coromandel Peninsula, New Zealand; Proceedings of the Pacrim '95 Conference, p. 545-550.
• Sturchio, N.C., Sultan, M., Arehart, G.B., Sano, Y., Kamar, Y.A., and Sayed, M., 1996, Composition and origin of thermal waters in the Gulf of Suez area, Egypt; Applied Geochemistry, v. 11, 471-479.
• Arehart, G.B., Chryssoulis, S.L. and Kesler, S.E., 1993, Gold and arsenic in iron sulfides from sediment-hosted disseminated gold deposits: Implications for depositional mechanisms; Economic Geology, v. 88, p. 171-185.
• Arehart, G.B., Eldridge, C.S., Chryssoulis, S.L., Kesler, S.E. and O'Neil, J.R., 1993, Ion microprobe determination of gold, arsenic, and sulfur isotopes in sulfides from the Post/Betze sediment-hosted disseminated gold deposit, Nevada; Geochimica et Cosmochimica Acta, v. 57, p. 1505-1520.
• Arehart, G.B., Foland, K.A., Naeser, C.W. and Kesler, S.E., 1993, Geology and geochronology of sediment-hosted micron gold deposits adjacent to the Goldstrike Stock, northeastern Nevada; Economic Geology, v. 88, p. 622-646.
• Arehart, G.B. and O'Neil, J.R., 1993, D/H ratios of supergene alunite as an indicator of paleoclimate in continental settings; Journal of Geophysical Research, Monograph 78, p. 277-284.
• Arehart, G.B., Kesler, S.E., O'Neil, J.R. and Foland, K.A., 1992, Evidence for the supergene origin of alunite in sediment-hosted micron gold deposits, Nevada; Economic Geology, v. 87, p. 263-271.
• Foland, K.A., Hubacher, F.A. and Arehart, G.B., 1992, 40Ar/39Ar dating of very fine-grained samples: An encapsulated-vial procedure to overcome the problem of 39Ar recoil loss; Chemical Geology, v. 102, p. 269-276.