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2009 Portland GSA Annual Meeting (18-21 October 2009)

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

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, Advocates
Paper #
Start Time
 
8:00 AM
Introductory Remarks
1
8:05 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., Department of Geology, Kansas State University, Manhattan, KS 66506, SAUNDERS, James A., Department of Geosciences, Auburn University, 210 Petrie Hall, Auburn, AL 36849 and HAMES, Willis E., Department of Geology and Geography, Auburn University, 210 Petrie Hall, Auburn, AL 36849, brueseke@ksu.edu, brueseke@ksu.edu
2
8:25 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, rpresnell@attglobal.net
3
8:40 AM
THE MAGNETITE CRISIS IN EVOLVING ARC MAGMAS
MAVROGENES, John A.1, JENNER, Frances1, O'NEILL, Hugh St.C.2 and ARCULUS, Richard J.1, (1)Research School of Earth Sciences, The Australian National Univ, ACT, Canberra, 0200, Australia, (2)Research School of Earth Sciences, Australian National University, ACT, Canberra, 0200, Australia, john.mavrogenes@anu.edu.au, john.mavrogenes@anu.edu.au
4
8:55 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, LANGE, Rebecca A., Department of Earth and Environmental 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, smcrabtr@umich.edu, smcrabtr@umich.edu
5
9:10 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, heacunn@hotmail.com
6
9:25 AM
GRANITE, PORPHYRIES, HYDROTHERMAL ACTIVITY AND VOLCANISM IN THE YERINGTON DISTRICT, NEVADA
PROFFETT, John M., P.O. Box 772066, Eagle River, AK 99577, DILLES, John H., College of Earth, Ocean & Atmospheric Sciences, Oregon State University, CEOAS Admin 104, Corvallis, OR 97331-5503 and LIPSKE, Joanna L., New Gold, Inc, 12200 E Briarwood Ave, Suite 165, Centennial, CO 80112, proffettak@aol.com, proffettak@aol.com
 
9:40 AM
Discussion
 
9:55 AM
Break
7
10:10 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, DILLES, John H., College of Earth, Ocean & Atmospheric Sciences, Oregon State University, CEOAS Admin 104, Corvallis, OR 97331-5503, GRUNDER, Anita L., Geosciences, Oregon State University, 104 Wilkinson Hall, Corvallis, OR 97331 and DUNCAN, Robert, Coas, Oregon State Univ, Corvallis, OR 97331, longotal@gmail.com, longotal@gmail.com
8
10:25 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, DILLES, John H., College of Earth, Ocean & Atmospheric Sciences, Oregon State University, CEOAS Admin 104, Corvallis, OR 97331-5503, MAZDAB, F.K., Tucson, AZ 85721 and WOODEN, J.L., U.S Geological Survey, Menlo Park, CA 94025, Robert_Lee@fmi.com, Robert_Lee@fmi.com
9
10:40 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, (2)Laboratory for Isotope Geology, Swedish Museum of Natural History, Box 50 007, Stockholm, 104 05, Sweden, jdwood@utu.fi, jdwood@utu.fi
10
10:55 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, Cynthia, USGS, 345 Middlefield Rd., MS 901, Menlo Park, CA 94025, ALEINIKOFF, John N., USGS, Denver Federal Center, MS 963, Denver, CO 80225, DAY, Warren C., US Geological Survey, MS 911, Denver, CO 80225, O'NEILL, J. Michael, USGS, Denver Federal Center, MS 964, Denver, CO 80225, SLACK, John F., USGS, National Center, MS 954, Reston, VA 20192 and WINTZER, Niki E., USGS, 904 W. Riverside Ave., Rm. 202, Spokane, WA 99201, cdusel@usgs.gov, cdusel@usgs.gov
11
11:10 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, (2)BHP Billiton, Level 3, 55 Grenfell St, Adelaide, SA, 5000, Australia, Isabelle.Chambefort@utas.edu.au, Isabelle.Chambefort@utas.edu.au
12
11:25 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, (2)Geology Department, Central Michigan Univ, 314 Brooks Hall, Mt. Pleasant, MI 48859, xliu1235@umd.edu, xliu1235@umd.edu
 
11:40 AM
Discussion II
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