Session: Economic Geology II: Carlin Au, Low and High Sulfidation Au-Ag-Cu, Porphyry Cu-Mo-Au, and W-Skarn Deposits (2002 Denver Annual Meeting (October 27-30, 2002))

Paper #

Start Time

1

1:30 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, ferdock@mines.unr.edu

2

1:45 PM

GOLD NANOPARTICLES IN ARSENIAN PYRITE FROM A CARLIN-TYPE DEPOSIT OBSERVED BY HRTEM

PALENIK, Christopher S.¹, UTSUNOMIYA, Satoshi², KESLER, Stephen E.³ and EWING, Rodney C.¹, (1)Department of Geological Sciences, Univ of Michigan, 425 E. University Ave, Ann Arbor, MI 48109-1063, (2)Nuclear Engineering and Radiological Sciences, Univ of Michigan, 2958 Cooley Bld, 2355 Bonisteel Blvd, Ann Arbor, MI 48109-2104, (3)Department of Geological Sciences, Univ of Michigan, 2534 C.C. Little Building, Ann Arbor, MI 48109-1063, cpalenik@umich.edu, cpalenik@umich.edu

3

2:00 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, 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, jrampe@unm.edu, jrampe@unm.edu

4

2:15 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, 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, djohn@usgs.gov, djohn@usgs.gov

5

2:30 PM

MULTIPLE EPISODES OF MAGMATISM AND MINERALIZATION IN THE COMSTOCK DISTRICT, NEVADA

CASTOR, Stephen B.¹, GARSIDE, Larry J.², HENRY, Christopher D.², HUDSON, Donald M.³, MCINTOSH, William C.⁴ and VIKRE, Peter G.⁵, (1)Nevada Bureau of Mines and Geology, Univ of Nevada, mail stop 178, Reno, NV 89557, (2)Nevada Bureau of Mines and Geology, University of Nevada, mail stop 178, Reno, NV 89557, (3)1540 Van Petten St, Reno, NV 89503, (4)New Mexico Bureau of Geology and Mineral Resources, New Mexico Tech, Socorro, NM 87801, (5)U.S. Geol Survey, mail stop 175, University of Nevada, Reno, NV 89557, scastor@unr.edu, scastor@unr.edu

6

2:45 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, (2)Department of Geosciences, Univ of Arizona, University of Arizona, Tucson, AZ 85721, rougvie.james@nmnh.si.edu, rougvie.james@nmnh.si.edu

7

3:00 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, lechavar@mines.edu

8

3:15 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, 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, gmasterm@utas.edu.au, gmasterm@utas.edu.au

9

3:30 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, (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, cdeyell@utas.edu.au, cdeyell@utas.edu.au

10

3:45 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, (2)99 Fifth Avenue, Suite 420, Ottawa, ON K1S 5P5, Canada, einan@pangea.stanford.edu, einan@pangea.stanford.edu

11

4:00 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, (2)Isotope Geochemistry and Mineral Resources, Federal Institute of Technology, ETH Zentrum NO, CH-8092, Zurich, Switzerland, asimon@geol.umd.edu, asimon@geol.umd.edu

12

4:15 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, (2)Isotope Geology and Mineral Resources, Department of Earth Sciences, ETH Zentrum, Zurich, 8092, Switzerland, redmond@pangea.stanford.edu, redmond@pangea.stanford.edu

13

4:30 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, 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, e_ronacher@hotmail.com, e_ronacher@hotmail.com

14

4:45 PM

GEOCHEMICAL DATA ANALYSIS TECHNIQUES FOR GOLD EXPLORATION IN SUMBAWA, INDONESIA

LANGER, Katherine E., 11764 Melody Drive, Northglenn, CO 80234 and CLOSS, L. Graham, Geology and Geological Engineering, Colorado School of Mines, Golden, CO 80401, bluequartz@aol.com, bluequartz@aol.com

15

5:00 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, (2)Geological Sciences, Jadavpur Univ, Kolkata, 700032, India, (3)HCL, Malanjkhand, 481116, India, masterjaz_99@hotmail.com, masterjaz_99@hotmail.com

16

5:15 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, smaes@geology.wisc.edu