Mineral-Resource Specialists

Mineral resource specialists examine the geologic and economic aspects of mineral resources. These specialists research the genesis and geologic setting of deposits, study the distribution of elements in the earth, and conduct assessments for undiscovered mineral resources. Resource specialists can answer questions related to the geologic aspects of mineral resources and exploration.

Alphabetical Index to Mineral-Resource Specialists

| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |

Abrasives: Peter J. Modreski; U.S. Geological Survey; Box 25046, Mail Stop 150; Denver Federal Center; Denver, CO 80225; telephone (303) 202-4766; pmodreski@usgs.gov
Aggregate Lightweight: Alfred L. Bush; U.S. Geological Survey; Box 25046, Mail Stop 941; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5646; abush@usgs.gov
Aluminum: (See Bauxite)
Asbestos: vacant
Barite: vacant
Bauxite/Aluminum: Floyd Gray; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520) 670-5582; fgray@usgs.gov
Bentonite: vacant
Beryllium: Peter J. Modreski; U.S. Geological Survey; Box 25046, Mail Stop 150; Denver Federal Center; Denver, CO 80225; telephone (303) 202-4766; pmodreski@usgs.gov
Boron Minerals: Greta J. Orris; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520) 670-5583; fax (520) 670-5113; greta@usgs.gov
Cadmium: vacant
Cesium: Peter J. Modreski; U.S. Geological Survey; Box 25046, Mail Stop 150; Denver Federal Center; Denver, CO 80225; telephone (303) 202-4766; pmodreski@usgs.gov
Chromium: Bruce R. Lipin; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6430; blipin@usgs.gov
Clays: vacant
Coal: James Luppens; U.S. Geological Survey; 956 National Center; Reston, VA 20192; (703) 648-6460; jluppens@usgs.gov; Leslie Ruppert; U.S. Geological Survey; 956 National Center; Reston, VA 20192; (703) 648-6431; lruppert@usgs.gov
Cobalt: vacant
Copper: vacant
Diatomite: vacant
Fluorine: Alan Wallace; U.S. Geological Survey; Reno Field Office; MacKay School of Earth Science; University of Nevada MS 176; Reno, NV 89557-0047; telephone (775) 784-5789; alan@usgs.gov
Gallium: Floyd Gray; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520)670-5582; fgray@usgs.gov
Gas Hydrates: Deborah Hutchinson; U.S. Geological Survey; 384 Woods Hold Road; Woods Hole, MA 02543-1598; (508) 457-2263; dhutchinson@usgs.gov; Timothy Collett; U.S. Geological Survey; Box 25046, MS 939; Denver, CO 80225; (303) 236-5731; tcollett@usgs.gov
Gemstones: Peter J. Modreski; U.S. Geological Survey; Box 25046, Mail Stop 150; Denver Federal Center; Denver, CO 80225; telephone (303) 202-4766; pmodreski@usgs.gov
Geothermal Energy: L.J. Patrick Muffler; U.S. Geological Survey; 345 Middlefield Road, Mail Stop 910; Menlo Park, CA 94025; telephone (650) 329-5239; pmuffler@usgs.gov; Colin Williams; U.S. Geological Survey; 345 Middlefield Road; MS 977; Menlo Park, CA 94025; (650) 329-4881; colin@usgs.gov
Gilsonite: Ron Johnson; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver, CO 80225; (303) 236-5546; rcjohnson@usgs.gov; John R. Dyni; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5544; jdyni@usgs.gov
Gold: Jeff L. Doebrich; U.S. Geological Survey; 913 National Center; Reston, VA 20192; telephone (703) 648-6103; jdoebric@usgs.gov
Gypsum: vacant
Hafnium: See zirconium
Iron: Klaus Schulz; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6320; kschulz@usgs.gov
Lead: vacant
Lithium: Greta J. Orris; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520) 670-5583; fax (520) 670-5113; greta@usgs.gov
Magnesium: Greta J. Orris; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520) 670-5583; fax (520) 670-5113; greta@usgs.gov
Manganese: William F. Cannon; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6345; wcannon@usgs.gov
Mercury: James J. Rytuba; U.S. Geological Survey; 345 Middlefield Road, Mail Stop 901; Menlo Park, CA 94025; telephone (650) 329-5418; jrytuba@usgs.gov
Molybdenum: Arthur A. Bookstrom; U.S. Geological Survey; Spokane Field Office; West 904 Riverside Ave.; Room 222; Spokane, WA 99201; telephone (509) 368-3119; abookstrom@usgs.gov
Nickel: vacant
Oil and Gas: Don Gauter; U.S. Geological Survey; 345 Middlefield Road; Building 15, MS 969; Menlo Park, CA 94025; (650) 329-4909; gautier@usgs.gov; Chris Schenk; U.S. Geological Survey; Box 25046, Mail Stop 934; Denver Federal Center; Denver, CO 80225; (303) 236-5796; schenk@usgs.gov
Oil Shale: Ron Johnson; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver, CO 80225; (303) 236-5546; rcjohnson@usgs.gov; John R. Dyni; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5544; jdyni@usgs.gov
Peat: Sandy Neuzil; U.S. Geological Survey; 956 National Center; Reston, VA 20192; telephone (703) 648-6443; sneuzil@usgs.gov
Perlite - Pumicite: Alfred L. Bush; U.S. Geological Survey; Box 25046, Mail Stop 941; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5646; abush@usgs.gov
Phosphate: vacant
Platinum-Group Metals: Michael L. Zientek; U.S. Geological Survey; Spokane Field Office; West 904 Riverside Ave.; Room 117; Spokane, WA 99201; telephone (509) 368-3105; mzientek@usgs.gov
Potash: vacant
Quartz: Peter J. Modreski; U.S. Geological Survey; Box 25046, Mail Stop 150; Denver Federal Center; Denver, CO 80225; telephone (303) 202-4766; pmodreski@usgs.gov
Radium: James K. Otton; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-8020; jkotton@usgs.gov
Radon: James K. Otton; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-8020; jkotton@usgs.gov
Rare Earths (Placer): Andrew E. Grosz; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6314; agrosz@usgs.gov
Rare Earths (Rock): Gordon B. Haxel; U.S. Geological Survey; 2255 North Gemini Drive; Bldg. 3 - Rm 343; Flagstaff, AZ 86001-1698; telephone (928) 368-3119; ghaxel@usgs.gov
Rhenium: Arthur A. Bookstrom; U.S. Geological Survey; Spokane Field Office; West 904 Riverside Ave; Room 202; Spokane, WA 99201; telephone (509) 353-3175; abookstrom@usgs.gov
Rubidium: Peter J. Modreski; U.S. Geological Survey; Box 25046, Mail Stop 150; Denver Federal Center; Denver, CO 80225; telephone (303) 202-4766; pmodreski@usgs.gov
Salt: vacant
Sand & Gravel (Offshore): S. Jeffress Williams; U.S. Geological Survey; Coastal and Marine Geology Program; 384 Woods Hole Rd.; Woods Hole, MA 02543; telephone (508) 457-2383; jwilliams@usgs.gov
Sand, Gravel & Stone: William H. Langer; U.S. Geological Survey; Box 25046, Mail Stop 964; Denver Federal Center; Denver, CO 80225; telephone (303) 236-1249; blanger@usgs.gov
Scandium: Andrew E. Grosz; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6314; agrosz@usgs.gov
Selenium: James M. McNeal; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6650; jmcneal@usgs.gov
Silica: vacant
Sodium Carbonate: John R. Dyni; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5544; jdyni@usgs.gov
Sodium Sulfate: John R. Dyni; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5544; jdyni@usgs.gov
Stone - Dimension: William H. Langer; U.S. Geological Survey; Box 25046, Mail Stop 964; Denver Federal Center; Denver, CO 80225; telephone (303) 236-1249; blanger@usgs.gov
Sulfur: vacant
Talc: Bradley S. Van Gosen; U.S. Geological Survey; Box 25046, Mail Stop 973; Denver Federal Center; Denver, CO 80225; telephone (303) 236-1566; bvangose@usgs.gov
Tellurium: James M. McNeal; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6650; jmcneal@usgs.gov
Tin: Robert J. Kamilli; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520) 670-5576; bkamilli@usgs.gov
Titanium: Andrew E. Grosz; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6314; agrosz@usgs.gov
Tungsten: Robert J. Kamilli; U.S. Geological Survey; E.N.R. Building; 520 N. Park Avenue, Suite 355; Tucson, AZ 85719-5035; telephone (520) 670-5576; bkamilli@usgs.gov
Uranium: James K. Otton; U.S. Geological Survey; Box 25046, Mail Stop 939; Denver Federal Center; Denver, CO 80225; telephone (303) 236-8020; jkotton@usgs.gov
Vanadium: George N. Breit; U.S. Geological Survey; Box 25046, Mail Stop 973; Denver Federal Center; Denver, CO 80225; telephone (303) 236-4951; gbreit@usgs.gov
Vermiculite: Alfred L. Bush; U.S. Geological Survey; Box 25046, Mail Stop 941; Denver Federal Center; Denver, CO 80225; telephone (303) 236-5646; abush@usgs.gov
Wollastonite: vacant
Yttrium: Andrew E. Grosz; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6314; agrosz@usgs.gov
Zeolites: vacant
Zinc: vacant
Zirconium and hafnium: Andrew E. Grosz; U.S. Geological Survey; 954 National Center; Reston, VA 20192; telephone (703) 648-6314; agrosz@usgs.gov

Mineral Resources	Eastern / Central / Western / Alaska / Minerals Information
	Crustal Imaging & Characterization / Spatial Data

Mineral-Resource Specialists

Other USGS Mineral Specialists