Session No. 82 Monday, October 28, 2002

1:30 PM-5:30 PM, Colorado Convention Center: A105/107
Economic Geology II: Carlin Au, Low and High Sulfidation Au-Ag-Cu, Porphyry Cu-Mo-Au, and W-Skarn Deposits
Adam C. Simon and David A. John, Presiding
 Paper #Start Time
82-11:30 PM MINERALOGY OF CARLIN-TYPE DEPOSITS IN THE GREAT BASIN, NEVADA AND UTAH, UNITED STATES OF AMERICA: FERDOCK, Gregory C., Geological Sciences, Mackay School of Mines, P.O. Box 15013, Reno, NV 89507, ferdock@mines.unr.edu.
82-21:45 PM GOLD NANOPARTICLES IN ARSENIAN PYRITE FROM A CARLIN-TYPE DEPOSIT OBSERVED BY HRTEM: PALENIK, Christopher S.1, UTSUNOMIYA, Satoshi2, KESLER, Stephen E.1, and EWING, Rodney C.1, (1) Department of Geological Sciences, Univ of Michigan, 425 E. University Ave, Ann Arbor, MI 48109-1063, cpalenik@umich.edu, (2) Nuclear Engineering and Radiological Sciences, Univ of Michigan, 2958 Cooley Bld, 2355 Bonisteel Blvd, Ann Arbor, MI 48109-2104
82-32:00 PM PALEOMAGNETIC AND GEOCHRONOLOGIC DATA BEARING ON THE DEFORMATION AND TIMING OF THE CRIPPLE CREEK DIATREME COMPLEX AND RELATED ROCKS, FRONT RANGE, COLORADO: RAMPE, Jason S., Department of Earth and Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, jrampe@unm.edu, GEISSMAN, John W., Earth and Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131-1116, MELKER, Marc, Mine Geology dept, AngloGold North America, Inc, POB 191, Victor, CO 80860, and HEIZLER, M., New Mexico Bureau of Mines and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, NM 87801
82-42:15 PM MIDDLE MIOCENE EPITHERMAL AU-AG DEPOSITS RELATED TO CONTINENTAL THOLEIITIC BASALT MAGMATISM, NORTHERN GREAT BASIN, WESTERN USA: JOHN, David A., US Geol Survey, 345 Middlefield Rd, MS-901, Menlo Park, CA 94025-3561, djohn@usgs.gov, WALLACE, Alan R., US Geol Survey, MS 176, Univ. Nevada, Reno, Reno, NV 89557-0047, and HOFSTRA, Albert H., U.S. Geol Society, MS-973, Denver Federal Center, PO Box 25046, Denver, CO 80225
82-52:30 PM MULTIPLE EPISODES OF MAGMATISM AND MINERALIZATION IN THE COMSTOCK DISTRICT, NEVADA: CASTOR, Stephen B.1, GARSIDE, Larry J.1, HENRY, Christopher D.1, HUDSON, Donald M.2, MCINTOSH, William C.3, and VIKRE, Peter G.4, (1) Nevada Bureau of Mines and Geology, University of Nevada, mail stop 178, Reno, NV 89557, scastor@unr.edu, (2) 1540 Van Petten St, Reno, NV 89503, (3) New Mexico Bureau of Geology and Mineral Resources, New Mexico Tech, Socorro, NM 87801, (4) U.S. Geol Survey, mail stop 175, University of Nevada, Reno, NV 89557
82-62:45 PM THE NATURE OF LOW-T K-METASOMATISM AT CREEDE, COLORADO: ROUGVIE, James R.1, SORENSEN, Sorena S.1, and BARTON, Mark D.2, (1) Dept. of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560-0119, rougvie.james@nmnh.si.edu, (2) Department of Geosciences, Univ of Arizona, University of Arizona, Tucson, AZ 85721
82-73:00 PM STRUCTURAL CONTROLS ON THE ARCATA EPITHERMAL VEIN SYSTEM, PERU: ECHAVARRIA, Leandro E and NELSON, Eric, Geology and Geological Engineering, Colorado School of Mines, 1500 Illinois St, Golden, CO 80401, lechavar@mines.edu
82-83:15 PM HIGH SULFIDATION GOLD-COPPER MINERALIZATION AT PEAK HILL, NSW, AUSTRALIA: DEFORMATION OF AN UNUSUAL EPITHERMAL DEPOSIT: MASTERMAN, Glenton J., Centre for Ore Deposit Research, Univ of Tasmania, GPO Box 252-79, Hobart, Tas, 7001, Australia, gmasterm@utas.edu.au, WHITE, Noel C., PO Box 5181, Kenmore East, Qld, 4069, Australia, and WILSON, Christopher J.L., School of Earth Sciences, Univ of Melbourne, Victoria, 3010, Australia
82-93:30 PM SYNCHRONOUS AU-ALUNITE IN THE PASCUA-LAMA HIGH-SULFIDATION SYSTEM: CONSTRAINTS ON THE ORIGIN AND CHEMISTRY OF MINERALIZING FLUIDS: DEYELL, Cari L.1, LEONARDSON, Robert2, RYE, Robert O.3, THOMPSON, John F.H.4, and COOKE, David R.1, (1) Centre for Ore Deposit Research, Univ of Tasmania, GPO Box 252-79, Hobart, 7001, Australia, cdeyell@utas.edu.au, (2) Barrick Gold, 732 Spring Creek Parkway, Spring Creek, NV 89815, (3) U.S. Geol Survey, Mail Stop 963, Denver Federal Center, Denver, CO 80225, (4) Teck Cominco Ltd, 600 - 200 Burrard Street, Vancouver, BC V6C 3L9, Canada
82-103:45 PM SULFIDATION STATE OF FLUIDS IN ACTIVE AND EXTINCT HYDROTHERMAL SYSTEMS: INAN, E. Esra1, EINAUDI, Marco T.1, and HEDENQUIST, Jeffrey W.2, (1) Geological and Environmental Sci, Stanford Univ, Bldg 320, Stanford, CA 94305-2115, einan@pangea.stanford.edu, (2) 99 Fifth Avenue, Suite 420, Ottawa, ON K1S 5P5, Canada
82-114:00 PM GOLD SOLUBILITY IN MAGNETITE: SIMON, Adam C.1, CANDELA, Philip A.1, PICCOLI, Philip M.1, PETTKE, Thomas2, and HEINRICH, Christoph A.2, (1) Laboratory for Mineral Deposits Research, Department of Geology, University of Maryland, College Park, MD 20742, asimon@geol.umd.edu, (2) Isotope Geochemistry and Mineral Resources, Federal Institute of Technology, ETH Zentrum NO, CH-8092, Zurich, Switzerland
82-124:15 PM CYCLICAL P-T-X EVOLUTION OF MAGMATIC-HYDROTHERMAL FLUIDS IN THE BINGHAM PORPHYRY CU-AU-MO DEPOSIT, UTAH: REDMOND, Patrick B.1, EINAUDI, Marco T.1, and LANDTWING, Marianne R.2, (1) Department of Geological and Environmental Sciences, Stanford Univ, Bldg. 320, Stanford, CA 94305, redmond@pangea.stanford.edu, (2) Isotope Geology and Mineral Resources, Department of Earth Sciences, ETH Zentrum, Zurich, 8092, Switzerland
82-134:30 PM FLUID CHEMISTRY AND ORE DEPOSITIONAL MECHANISMS AT THE PORGERA GOLD DEPOSIT, PAPUA NEW GUINEA: RONACHER, Elisabeth, Dept. of Earth & Atmospheric Sciences, Univ of Alberta, Edmonton, AB T6G 2E3, Canada, e_ronacher@hotmail.com, RICHARDS, Jeremy P., Dept. of Earth & Atmospheric Sciences, Univ of Alberta, Earth Sciences Building, Rm. 3-02, Edmonton, AB T6G 2E3, Canada, and REED, Mark H, Dept. of Geological Sciences, Univ of Oregon, Eugene, OR 97403-1272
82-144:45 PM GEOCHEMICAL DATA ANALYSIS TECHNIQUES FOR GOLD EXPLORATION IN SUMBAWA, INDONESIA: LANGER, Katherine E., 11764 Melody Drive, Northglenn, CO 80234, bluequartz@aol.com and CLOSS, L. Graham, Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401
82-155:00 PM RE-OS DATING OF THE MALANJKHAND CU(MO) DEPOSIT IN CENTRAL INDIA: TRACKING FORMATION AND DEFORMATION DURING THE LATE ARCHEAN-EARLY PROTEROZOIC: ZIMMERMAN, A.1, STEIN, H.J.1, MARKEY, R.J.1, HANNAH, J.L.1, SARKAR, S.C.2, and PAL, A.B.3, (1) AIRIE Program, Department of Earth Resources, Colorado State Univ, Fort Collins, CO 80523-1482, masterjaz_99@hotmail.com, (2) Geological Sciences, Jadavpur Univ, Kolkata, 700032, India, (3) HCL, Malanjkhand, 481116, India
82-165:15 PM SCHEELITE GEOCHEMISTRY OF THE PINE CREEK PENDANT: EMPA AND STABLE ISOTOPE MICROANALYSIS: MAES, Stephanie M., BROWN, Philip E., and VALLEY, John W., Geology and Geophysics, Univ of Wisconsin-Madison, 1215 W. Dayton Street, Madison, WI 53706, smaes@geology.wisc.edu

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