Carl E. Nelson
Carl E. Nelson Boulder, Colorado 80304
email: nelson@cbmap.net
geologic mapping in the
Dominican Republic
Discovery History
McLaughlin gold deposit, California (3.2 Moz gold, 1985 – 1997). As a research geologist for Homestake Mining Company, developed a model for gold mineralization in hot spring systems that led to the 1980 discovery of the McLaughlin deposit, California.
Crofoot/Lewis gold deposit, Nevada (2.5 Moz gold, 1987 to present). As a research geologist for Homestake Mining Company in 1981, recognized gold potential, sited the discovery hole and ran a program (112 drill holes) that defined a preliminary gold resource. Put into production by Hycroft Resources in 1987 at a rate of 100,000 ounces per year and later sold to Vista Gold. Production through 2004 is 1.05 Moz.
Cerro Chorcha, Panama (currently in resource evaluation): As consulting geologist with Recursos del Caribe, discovered the Cerro Chorcha porphyry copper deposit in 1991 for Noranda by following up on anomalous stream sediment samples collected by Asarco in the 1960’s. NI 43-101 compliant resources as of 2007 stood at 138,500,000 tonnes of 0.5% copper.
San Andres gold deposit, Honduras (1.4 M ounces gold, 1983 to present): As consulting geologist with Recursos del Caribe in 1993, recognized, sampled and documented bulk mineable gold mineralization (on behalf of Noranda). Credited by Ed Campbell, then owner of San Andres, with the discovery of what is, today, a 1.4 Moz ore deposit operated by Aura Minerals.
El Aguila gold deposit, Mexico (currently in production, 2009 to present): As consulting geologist with Recursos del Caribe, responsible for discovery of economic gold mineralization (on behalf of Apex) and the 1998 siting of the discovery hole and initial drill program at El Aguila.
Anabella, Guatemala (0.7 Moz gold, currently in resource evaluation). As consulting geologist with Recursos del Caribe in 1999, sited discovery drill holes for Aquest at the Anabella and Los Lirios deposits.
Consulting Geologist: May 1982 to present Worldwide contract mineral exploration and property evaluation with a special interest in Central America and the Caribbean Basin. Activities have included regional exploration, property evaluation and assessment, detailed geologic mapping and target definition, drill testing and reserve development, and the preparation of qualifying reports. Special interests include:
- Central America and the Caribbean Basin.See Nelson (1990, 1992, 1992, 1995, 1996, 2000)
- Epithermal precious metal deposits, especially hot spring deposits.See Nelson (1988, 1991, 1992, 2000)
- Use of multi-element geochemistry to distinguish Carlin-type ore deposits from barren Carlin-type systems.See Nelson (1990, 1991).
Consulting positions held include senior consulting geologist with Cimarron Exploration (May 1982 through April 1984); and, president of Recursos del Caribe, S.A., a consulting firm incorporated in Costa Rica and Panama, since September 1988. A model describing the relationship between volcanic dome emplacement and base and precious metal mineralization at the Pueblo Viejo deposit, Dominican Republic was published in Mineralium Deposita (Nelson, 2000).
Research geologist: Homestake Mining Co., May 1980 to April 1982
Research geology and geochemistry. Activities included detailed geologic mapping, alteration studies, geochemical modeling and geophysical characterization of the McLaughlin gold deposit, California and evaluation of epithermal precious metal resources in the western United States, Canada, Mexico, Japan and New Zealand. A model relating hot spring gold deposits to hydrothermal eruption events was published in Economic Geology (Nelson and Giles, 1985).
Staff Geologist: Anaconda Copper Company, June 1976 to May 1980
Hard rock uranium exploration in the western United States and Canada including major projects in the Marysvale volcanic field (Utah) and the Copper Mountain district (Wyoming). Activities included project generation; prospect evaluation and acquisition; detailed geologic mapping; target definition, drill evaluation, and reserve development. Responsibilities included supervision of a team of three geologists with an annual budget of $500,000. A model published in Economic Geology for Schwarzwalder-type uranium mineralization focuses on a Proterozoic origin for these high-grade deposits (Nelson and Gallagher, 1982).
Assistant geologist: Phelps Dodge Corporation, summer of 1975
Molybdenum exploration and drill logging in the Colorado Mineral Belt.
Education
Amherst College: Bachelor of Arts degree in Geology awarded magna cum laude in June, 1973. Grade point average of 3.4 (4.0 scale). Elected to the Sigma Xi Research Society. Thesis: Stratigraphy, structure and metamorphism of Paleozoic rocks, Sterling area, Central Massachusetts.
Dartmouth College: Masters degree in geology awarded in June 1975. Grade point average of 3.6 (4.0 scale). Dartmouth College and J.W. Simpson fellowships. Thesis: Structure and petrology of the Thorndike Pond area, southwestern New Hampshire.
Univ. of California, Los Angeles (UCLA): Graduate work in solid inclusion piezothermometry through June 1976.
Grade point average of 3.6 (4.0 scale). Shell fellowship and National Science Foundation research assistantship.
University of Costa Rica: Fulbright Foundation Faculty research grant from September, 1987 through December, 1988. Research topic: Gold mineralization of the Caribbean Basin – Source and Potential.
List of Clients
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Amax Exploration Inc. |
Kennecott Exploration Inc. |
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Anaconda Minerals Company |
Lac Minerals (USA) Inc. |
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Apex Minerals Inc. |
Laguna Gold Company |
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Arctic Precious Metals Inc. |
Mapco Minerals Inc. |
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Atlas Minerals Company |
Midland of Costa Rica, S.A. |
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Australian Ores and Minerals Ltd. |
Mallon Minerals Company |
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Barrick Gold Corp. |
MINNOVA Inc. (Metall, INMET)) |
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BHP Minerals Inc. |
Mar-West Resources Ltd. |
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BP Minerals Inc. |
Mirage Resources Ltd. |
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Canyon Resources |
Mobil Mining and Metals Company |
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Chevron Resources Company |
Monarch Resources |
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Chevron Oilfield Research Inc. |
Mount Isa Mines (Exploration) Pty. |
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Cimarron Exploration Inc. |
Newcrest Mining Company |
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Cominco American Inc. |
Newmont Exploration Inc. |
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Corona Corporation |
Nicor Mineral Ventures Inc.
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| Crown Resources |
Noranda Exploration Inc. |
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Cyprus Exploration Inc. |
Phelps Dodge Inc. |
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Equinox Ltd. |
Placer International Inc. |
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Exxon Minerals Company |
St. Mary Minerals Inc. |
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FMC Corporation |
Santa Fe Mining Company |
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FRM Minerals Company |
Summo Minerals Inc. |
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Falconbridge Exploration Inc. |
Superior Oil Company |
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Fischer-Watt Mining Company |
Teck Resources Inc. |
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Freeport Exploration Inc. |
United Pacific Gold Ltd. |
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Giant Yellowknife Ltd. |
U.S. Borax |
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Greenstone Resources |
United Nations Development Program |
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Homestake Mining Company |
United Nations Revolving Fund |
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Homestake International Minerals |
Western Mining Inc. |
Miscellaneous
Professional Societies:
- Geological Society of America
- Society of Economic Geologists
- Amer. Assn. Petrol. Geologists
- Denver Reg. Expl. Geol. Soc.
Health: excellent
Languages: English, Spanish, French
Publications
Nelson, C.E., 2006, Metallic mineral resources: in Bundschuh, J. and Alvarado, G.E., (eds.) Central America: Geology, Resources and Hazards. A.A. Balkema, pub., London, chapter 32, p. 885-915.
Nelson, C.E., 2001, Gold mineralization in dome fields of the Veraguas Belt, Panama: in, Albinson, T. and Nelson, C.E., eds., Society of Economic Geologists, Special Publication Series.
Nelson, C.E. and Nietzen, F., 2001, Metalogenia de oro y cobre en America Central: Revista Geologica de America Central.
Nelson, C.E., 2000, Volcanic domes and gold mineralization at the Pueblo Viejo deposit, Dominican Republic: Mineralium Deposita, v. 35, p. 511-535.
Nelson, C.E., 2000, Volcanic dome emplacement and Au-Ag-Zn mineralization at the Moore Deposit, Pueblo Viejo district, Dominican Republic: 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. Soc. Nevada Symposium Proceedings, May 15-18, 2000, p. 67-77.
Nelson, C. and Ganoza, J., 1999, Geologia de la Franja Aurifera de Veraguas, Panama: Revista Geologica de America Central, no. 22, p. 85-100.
Nelson, C.E., 1996, Gold and copper metallogeny of Central America: in Coyner, A.R. and Fahey, P.L., eds., Geology and Ore Deposits of the American Cordillera: Geological Society of Nevada, vol. 3, p. 1397-1411.
Nelson, C.E., 1995, Porphyry copper deposits of southern Central America: in Pierce, F.W. and Bolm, J.G., eds., Porphyry copper deposits of the American Cordillera, Arizona Geological Society Digest, vol. 20., p. 553-565.
Nelson, C.E., 1992, Exploration and Mining Activity in Central America: Randol at MineExpo ’92 – Workshop Proceedings, Randol International Ltd., p. 5-8.
Nelson, C.E., 1992, Gold mineralization in maar craters, two examples from southern Central America: Randol at MineExpo ’92 – Workshop Proceedings, Randol International Ltd., p. 55-58a.
Nelson, C.E. and Arauz C., A., 1992, Depositos de metales preciosos de gran tonelaje en la region del Caribe: Revista Geologica de America Central, vol. 14, p. 39-57.
Nelson, C., Muto, P., Robinson, D., 1991, Hot spring systems: in Geology and Ore Deposits of the Great Basin – Field trip Guidebook Compendium, vol. 1, p. 393-400.
Nelson, C.E., 1991, Metalliferous marine black shales and fossil petroleum reservoirs – source rock and host environment for Carlin-type gold deposits: Geology and Ore Deposits of the Great Basin – Symposium Proceedings, Geological Society of Nevada, p. 249-254.
Nelson, C.E., 1990, Comparative geochemistry of jasperoids from Carlin-type gold deposits of the western United States: in Hedenquist, J.W., White, N.C., and Siddeley, G., eds., Epithermal gold mineralization of the Circum-Pacific: Geology, Geochemistry, Origin and Exploration, II: Journal of Geochemical Exploration, vol. 36, p. 171-195.
Nelson, C.E., 1990, Bulk mineable epithermal precious metal deposits of the Circum-Caribbean region: in Hausen, D.M., Halbe, D.N., Petersen, E.U., and Tafuri, W.J., eds., Gold ’90 – Symposium Proceedings. Society for Mining, Metallurgy, and Exploration, Littleton, Colorado, p. 149-161.
Nelson, C.E., 1988, Gold deposits in the hot spring environment: in Schafer, R.W., Cooper, J.J. and Vikre, P.G., eds., Bulk mineable precious metal deposits of the Western United States – Symposium Proceedings. Geological Society of Nevada, p. 417-432.
Cunningham, C.G., Nelson, C.E., Bonham, H.F., and Izawa, E., 1986, Selected bibliography of epithermal precious metal mineralization: United States Geological Survey Open File report 86-266, 48 p.
Nelson, C.E. and Giles, D.L., 1985, Hydrothermal eruption mechanisms and hot spring gold deposits: Economic Geology, vol. 80, no. 6, p. 1633-1639.
Giles, D.L. and Nelson, C.E., 1982, Principal features of epithermal lode gold deposits of the Circum-Pacific Rim: American Association of Petroleum Geologists, Transactions of the Third Circum-Pacific Energy and Mineral Resources Conference, p. 273-278.
Nelson, C.E. and Gallagher, J.R.L., 1982, Proterozoic origins of uranium mineralization in the Colorado Front Range: Economic Geology, v. 77, no. 5, p. 1221-1225.
Cleary J., Dann, J., Hallager, W., Hyde, D., Nelson, C., Page, R., Reynolds, J., Stimson, J., Struhsacker, E., 1980, Mapa geologico de Nueva Santa Rosa, Guatemala (1:50,000): Instituto Geografico Nacional, Guatemala City, Guatemala.
Beaty, D., Bergquist, C., Beyer, W., Dann, J., Dobson, D., Erler, E., Hyde, D., Hitzman, M., Jacobsen, G., Nelson, C., Reynolds, J., 1980, Mapa geologico de Cuilapa (1:50,000): Instituto Geografico Nacional, Guatemala City, Guatemala.
Presentations
Volcanic dome emplacement and Au-Ag-Zn mineralization at the Moore deposit, Pueblo Viejo District, Dominican Republic: Geology and Ore Deposits 2000, World Class Gold Systems, Geological Society of Nevada, Reno, Nevada. May 15-18, 2000.
Volcanic domes and gold mineralization at the Pueblo Viejo deposit, Dominican Republic: Denver Regional Exploration Geologists Meeting, October 4, 1999 and Vancouver Roundup – 2000, January, 2000.
Gold mineralization in the Veraguas Dome Field, Panama: 17th World Mining Congress, Acapulco, October 14-18, 1997.
Gold and Copper metallogeny of Central America: Geology and Ore Deposits of the American Cordillera, Geological Society of Nevada Symposium, April 10-13, 1995.
Metallogenic evolution of Panama: Convencion Minera para America Latina, America Minera I, March 8-10, 1995.
Integration of Geology in Exploration and Operations – Epithermal Deposits: Session chariman, Society for Mining, Metallurgy and Exploration, annual meeting, Denver, February, 1995.
Modelos geologicos de mineralizacion: Colegio Panameno de Geologos, Seminario Taller, December 9, 1994.
Porphyry copper deposits of Southern Central America: Bootprints along the Cordillera, Arizona Geological Society, October 5-7, 1994.
Comparative geochemistry of jasperoids from Carlin-type gold deposits of the western United States: Oil, Gold and Hydrothermal Symposium, American Association of Petroleum Geologists, Rocky Mountain Section meeting, Salt Lake City, September 12-15, 1993.
Early Island arc volcanic rock packages and gold mineralization around the Caribbean Basin: Integrated methods in Exploration and Discovery, Society of Economic Geologists Conference, Denver, April 17-20, 1993.
Maar hosted bulk mineable precious metal deposits of the Caribbean Region: Society for Mining, Metallurgy and Exploration, annual meeting, February, 1993.
Gold and copper mineralization in Central America: Cordilleran Geology and Exploration Roundup, Vancouver, January 26-29, 1993.
The gold geology of maar diatremes: Workshop on the Gold Geology of Maar Diatremes, Randol at MineExpo ‘92, Las Vegas, October 17-18, 1992.
Central America Exploration and Mining Activity: Workshop on Latin America Mining Development and Opportunities, Randol at MineExpo ‘92, Las Vegas, October 17-18, 1992.
Gold deposits in maar craters – two examples: Penrose conference on fluid-volcano interactions, Warm Springs, Oregon, October, 1992.
Exploration geochemistry of jasperoids: Assn. of Expln. Geochemists, annual meeting, Reno, 1991
Multivariate methods for treating geochemical data from gold deposits: Society for Mining, Metallurgy and Exploration, annual meeting, Denver, 1991
Metalliferous marine black shales and fossil petroleum reservoirs:Source rock and host environment for Carlin-type gold deposits (poster session). Geological Society of Nevada Symposium on Geology and Ore Deposits of the Great Basin, Reno, 1990
Bulk mineable epithermal precious metal deposits of the Circum-Caribbean Region. Session on Circum-Pacific Epithermal Systems, Society for Mining, Metallurgy and Exploration – American Institute of Mining Engineers, annual meeting, Salt Lake City, 1990.
Epithermal precious metal deposits of the Circum-Caribbean Region. Circum-Pacific Energy and Mineral Resources Council Symposium on Energy and Mineral Potential of the Central American-Caribbean Region, San Jose, Costa Rica, 1989.
Gold deposits in hot spring environments. Geological Society of Nevada Symposium on Bulk Mineable Precious Metal Deposits of the Western United States, Reno, 1987.
A comparative study of barren and mineralized Carlin-type gold deposits. GEOEXPO/86, Association of Exploration Geochemists and Geological Association of Canada – Cordilleran Section, joint meeting, Vancouver, 1986.
Applications of multivariate analysis to precious metal exploration in the western United States. Geological Society of America annual meeting, Orlando, 1985, Abs. With Progs., vol. 17, no. 7, p. 675; Geological Society of Nevada meeting, January, 1986.
Bonanza-type epithermal gold-silver deposits. Colorado School of Mines International workshop on Gold Deposit Modeling in Exploration, Golden, 1985.
Tectonic controls on precious metal mineralization in the Circum-Pacific region.
United Nations Development Program International Symposium on Mineral Deposit Modeling, Manila, Philippines, 1985.
Controls on precious metal mineralization in hot spring environments. Society of Economic Geologists symposium on Geothermal Systems and Ore Deposits, Los Angeles, 1984.
Precious metal deposits in brecciated hot spring systems. Invitational research conference on Brecciation and Mineralization – Geologic Occurrence and Genesis, Colorado Springs, 1984
Geology and mineral deposits of the Clear Lake area, central California.
Geol. Assn. of Canada – Mineral Deposits Division Fieldtrip, 1984
Gold in hot spring environments. Denver Regional Exploration Geologists Society, September, 1982; Arizona Geological Society of America Abs. with Progs., v. 13, no. 4, p. 220
Principal features of epithermal lode gold deposits of the Circum-Pacific Rim. Circum-Pacific Energy and Mineral Resources Conference, Honolulu, 1982.
Early Proterozoic origin for uranium mineralization in the Colorado Front Range (with J.R.L. Gallagher). Geological Society of America Abs. with Progs., v. 13, no. 4, p. 220.
A mode-modified molecular norm calculation for igneous and metamorphic rocks (with M. Hibbard). Geol. Soc. America meeting, 1976, Abs. with Programs, vol. 8, no. 3, p. 398-399.
Stratigraphy, structure and metamorphism of Paleozoic rocks, Sterling area, central Massachusetts (with M.A. Kuntz). Geol. Soc. Amer. Meeting, 1973, Abs. with Progs., v. 5, no. 2, p. 201.
References, academic transcripts and publication reprints are available upon request.