2009 Portland GSA Annual Meeting (18-21 October 2009)
Session No. 158 Tuesday, 20 October 2009
8:00 AM-12:00 PM, Oregon Convention Center: E143/144

T80. Magmas and Volatiles: Linking Granites, Volcanoes, Geothermal Systems, and Mineral Deposits I (Society of Economic Geologists)

John Dilles, Jacob B. Lowenstern and David A. John, Presiding
 Paper #Start Time
 8:00 AM Introductory Remarks
158-18:05 AM MID-MIOCENE MAGMATISM AND MINERALIZATION IN THE NORTHERN GREAT BASIN AND OREGON PLATEAU: THE LINK BETWEEN BONANZA EPITHERMAL ORE DEPOSITS AND THE YELLOWSTONE HOTSPOT: BRUESEKE, Matthew E.1, SAUNDERS, James A.2, and HAMES, Willis E.2, (1) Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506, brueseke@ksu.edu, (2) Department of Geology and Geography, Auburn University, 210 Petrie Hall, Auburn, AL 36849
158-28:25 AM PALEOSUBDUCTION ZONES AND FORMATION OF WORLD CLASS PORPHYRY COPPER DEPOSITS: PRESNELL, Ricardo, Alta Exploration Consulting, 7131S 2930E, Cottonwood Heights, UT 84121, rpresnell@attglobal.net
158-38:40 AM THE MAGNETITE CRISIS IN EVOLVING ARC MAGMAS: MAVROGENES, John A., JENNER, Frances, O'NEILL, Hugh St.C., and ARCULUS, Richard J., Research School of Earth Sciences, The Australian National Univ, ACT, Canberra, 0200, Australia, john.mavrogenes@anu.edu.au
158-48:55 AM A KINETIC BARRIER TO PLAGIOCLASE NUCLEATION IN DEGASSING ANDESITE AND DACITE LIQUIDS DURING RAPID ASCENT: CRABTREE, Stephen M., Geological Sciences, University of Michigan, 1100 North University Ave, Ann Arbor, MI 48109-1005, smcrabtr@umich.edu, LANGE, Rebecca A., Department of Geological Sciences, Univ Michigan, 425 E University, Ann Arbor, MI 48109, and FREY, Holli M., Department of Geology, Union College, 807 Union St, Schenectady, NY 12308-1307
158-59:10 AM HOW DOES DEGASSING IN AN ACTIVE CALDERA DIFFER FROM OTHER SYSTEMS? U-SERIES ISOTOPES CONSTRAIN THE TIME SCALES OF GAS TRANSFER AT RABAUL CALDERA, PNG: CUNNINGHAM, Heather and TURNER, Simon, Earth and Planetary Science, Macquarie University, Sydney, 2109, Australia, heacunn@hotmail.com
158-69:25 AM GRANITE, PORPHYRIES, HYDROTHERMAL ACTIVITY AND VOLCANISM IN THE YERINGTON DISTRICT, NEVADA: PROFFETT, John M., P.O. Box 772066, Eagle River, AK 99577, proffettak@aol.com, DILLES, John H., Geosciences, Oregon State University, Wilkinson Hall 104, Corvallis, OR 97331-5506, and LIPSKE, Joanna L., New Gold, Inc, 12200 E Briarwood Ave, Suite 165, Centennial, CO 80112
 9:40 AM Discussion
 9:55 AM Break
158-710:10 AM EVOLUTION OF VOLCANISM AND THE ASSOCIATED HIGH-SULFIDATION EPITHERMAL GOLD DEPOSITS AT YANACOCHA, PERU: LONGO, Anthony A., Department of Geosciences, Oregon State University, Corvallis, OR 97370, longotal@gmail.com, DILLES, John H., Geosciences, Oregon State University, Wilkinson Hall 104, Corvallis, OR 97331-5506, GRUNDER, Anita L., Geosciences, Oregon State University, Corvallis, OR 97331, and DUNCAN, Robert, COAS, Oregon State Univ, Corvallis, OR 97331
158-810:25 AM EUROPIUM ANOMALIES IN ZIRCON FROM GRANODIORITE PORPHYRY INTRUSIONS AT THE EL SALVADOR PORPHYRY COPPER DEPOSIT, CHILE: LEE, Robert G., 10861 N. Mavinee Dr. #141, Oro Valley, AZ 85737, Robert_Lee@fmi.com, DILLES, John H., Geosciences, Oregon State University, Wilkinson Hall 104, Corvallis, OR 97331-5506, MAZDAB, F.K., Tucson, AZ 85721, and WOODEN, J.L., U.S Geological Survey, Menlo Park, CA 94025
158-910:40 AM DISTURBANCE OF U-Pb IN ZIRCON BY Mo-W-MINERALISING MAGMATIC FLUIDS IN THE LATE SVECOFENNIAN BISPBERGS KLACK GRANITE, SWEDEN: WOODARD, Jeremy1, SUNDBLAD, Krister1, and SCHÖBERG, Hans2, (1) Department of Geology, University of Turku, FIN-20014, Turku, Finland, jdwood@utu.fi, (2) Laboratory for Isotope Geology, Swedish Museum of Natural History, Box 50 007, Stockholm, 104 05, Sweden
158-1010:55 AM IMPLICATIONS OF NEW SHRIMP U-PB ZIRCON CRYSTALLIZATION AGES FOR THE ORIGIN OF CARBONATE REPLACEMENT AND SKARN MINERALIZATION IN THE WESTERN FORTYMILE MINING DISTRICT, EAST-CENTRAL ALASKA: DUSEL-BACON, Cynthia1, ALEINIKOFF, John N.2, DAY, Warren C.3, O'NEILL, J. Michael4, SLACK, John F.5, and WINTZER, Niki E.1, (1) USGS, 345 Middlefield Rd., MS 901, Menlo Park, CA 94025, cdusel@usgs.gov, (2) USGS, Denver Federal Center, MS 963, Denver, CO 80225, (3) USGS, Denver Federal Center, MS 911, Denver, CO 80225, (4) USGS, Denver Federal Center, MS 964, Denver, CO 80225, (5) USGS, National Center, MS 954, Reston, VA 20192
158-1111:10 AM THE ROLE OF FLUORINE-BEARING MAGMATIC-HYDROTHERMAL FLUIDS IN THE FORMATION OF THE SUPERGIANT OLYMPIC DAM U-AU-CU-AG DEPOSIT, SOUTH AUSTRALIA: CHAMBEFORT, Isabelle1, MCPHIE, Jocelyn1, KAMENETSKY, Vadim1, AGANGI, Andrea1, ALLEN, Sharon1, BATH, Adam1, and EHRIG, Kathy2, (1) CODES, ARC Centre of Excellence in Ore Deposits, University of Tasmania, Private Bag 126, Hobart, 7001, Australia, Isabelle.Chambefort@utas.edu.au, (2) BHP Billiton, Level 3, 55 Grenfell St, Adelaide, SA, 5000, Australia
158-1211:25 AM ADVECTION-DIFFUSION CONTROLLED LITHIUM ISOTOPIC DISTRIBUTION IN CONTACT AUREOLES: —A CASE STUDY FROM THE FLORENCE COUNTY PEGMATITES, WISCONSIN: LIU, Xiao-Ming1, RUDNICK, Roberta L.1, HIER-MAJUMDER, Saswata1, and SIRBESCU, Mona-Liza C.2, (1) Department of Geology, University of Maryland-College Park, College Park, MD 20742, xliu1235@umd.edu, (2) Geology Department, Central Michigan Univ, 314 Brooks Hall, Mt. Pleasant, MI 48859
 11:40 AM Discussion II

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