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2002 Denver Annual Meeting (October 27-30, 2002)

Session No. 25
Sunday, 27 October 2002: 8:00 AM-12:00 PM

T85. Microprobe Monazite Geochronology: New Developments and Applications

Mineralogical Society of America

 

Robert J. Tracy and Michael L. Williams, Advocates
Paper #
Start Time
1
8:00 AM
BACKGROUND DETERMINATION AND INSTRUMENTAL PARAMETERS IN ELECTRON MICROPROBE AGE DATING TECHNIQUES
JERCINOVIC, Michael J., Dept. of Geosciences, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-5820 and WILLIAMS, Michael L., Dept. of Geosciences, Morrill Sci Ctr, Univ of Massachusetts, 611 North Pleasant Street, Amherst, MA 01003-5820, mjj@geo.umass.edu, mjj@geo.umass.edu
2
8:15 AM
OBTAINING MONAZITE MICROPROBE AGES -- A NOVICE’S QUESTIONS AND NEED
BERSCH, Michael G., School of Mines and Energy Development, University of Alabama, 105 Bevill Building, Tuscaloosa, AL 35487-0164, mbersch@wgs.geo.ua.edu, mbersch@wgs.geo.ua.edu
3
8:30 AM
IN SITU EMP AND ID-TIMS COMBINED U-TH-PB DATING OF SINGLE MONAZITES: A NEW METHOD TO UNRAVEL COMPLEX POLYMETAMORPHIC EVOLUTIONS. APPLICATION TO THE UHT GRANULITES OF ANDRIAMENA (NORTH-CENTRAL MADAGASCAR)
GONCALVES, Philippe, PAQUETTE, Jean-Louis, NICOLLET, Christian and DEVOUARD, Bertrand, Laboratoire Magmas et Volcans, Université Blaise Pascal, 5, rue Kessler, Clermont-Ferrand, 63038, France, P.Goncalves@opgc.univ-bpclermont.fr, P.Goncalves@opgc.univ-bpclermont.fr
4
8:45 AM
ICP-MS/TIMS ANALYSES OF MONAZITES AND XENOTIME FROM MIGMATITES IN THE AAR MASSIF
OLSEN, Sakiko N.1, KRAMERS, J.D.2, BERGER, A.2 and LIVI, Kenneth1, (1)Earth & Planetary Sciences, Johns Hopkins Univ, Baltimore, MD 21218, (2)Institut für Geologie, Universität Bern, Bern, Switzerland, olsen@jhu.edu, olsen@jhu.edu
5
9:00 AM
TEXTURE, CHEMISTRY, AND AGE VARIATIONS IN MONAZITE FROM GREENSCHIST TO GRANULITE FACIES, LONGSTAFF BLUFF FORMATION, CENTRAL BAFFIN ISLAND, NUNAVUT, CANADA
GAGNÉ, Simon1, JAMIESON, Rebecca A.1, MACKAY, Robert M.1 and CORRIGAN, David2, (1)Department of Earth Sciences, Dalhousie Univ, Halifax, NS B3H 3J5, Canada, (2)Geol Survey of Canada, 615 Booth Street, Ottawa, ON K1A 0E9, Canada, sgagne@is2.dal.ca, sgagne@is2.dal.ca
6
9:15 AM
MICROPROBE MONAZITE GEOCHRONOLOGY OF FOOTWALL ROCKS BENEATH THE SUDBURY IGNEOUS COMPLEX
HALL, Douglas C.1, BOAST, Michelle2 and SPRAY, John G.2, (1)Electron Microscopy Unit, Univ of New Brunswick, Bailey Drive, Fredericton, NB E3B 6E1, Canada, (2)Planetary and Space Science Centre, Department of Geology, University of New Brunswick, 2 Bailey Drive, Fredericton, NB E3B 5A3, Canada, dhall@unb.ca, dhall@unb.ca
7
9:30 AM
A COMPARISON OF CHIME AND ID-TIMS U-PB MONAZITE AGES FROM THE ROCKY MOUNTAIN TRENCH NEAR GOLDEN, BRITISH COLUMBIA, CANADA AND THE IMPORTANCE OF CHIME ANALYSES
BOGGS, Katherine J.E.1, KAMO, Sandra L.2, SIMONY, Philip1, MOORE, John3 and ARCHIBALD, Douglas4, (1)Depart, Univ of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada, (2)Geochronology Laboratory, Royal Ontario Museum, 100 Queen's Park, Toronto, ON M5S 2C6, Canada, (3)Department of Earth Sciences, Simon Fraser Univ, 8888 University Dr, Burnaby, BC V5A 1S6, Canada, (4)Department of Geological Sciences and Geological Engineering, Queen's Univ, Miller Hall, Kingston, ON K7L 3N6, Canada, boggs@geo.ucalgary.ca, boggs@geo.ucalgary.ca
8
9:45 AM
INSIGHTS INTO THE CHEMICAL AND ISOTOPIC COMPLEXITIES OF METAMORPHIC MONAZITE; INTEGRATION OF IDTIMS AND SHRIMP GEOCHRONOLOGY WITH BSE AND Y-TH-U X-RAY MAPPING TECHNIQUES
GIBSON, H. Daniel1, CARR, Sharon D.1, HAMILTON, Mike A.2 and BROWN, Richard L.1, (1)Earth Sciences, Carleton Univ, 1125 Colonel By Dr, Ottawa, ON K1S 5B6, Canada, (2)J.C. Roddick Ion Microprobe Lab, Geol Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada, dhgibson@ccs.carleton.ca, dhgibson@ccs.carleton.ca
9
10:00 AM
CHEMICAL DATING OF MONAZITE IN THE BLACK HILLS, SOUTH DAKOTA, WITH IMPLICATIONS FOR PROTEROZOIC THERMOTECTONISM IN THE EASTERN WYOMING PROVINCE
DAHL, Peter S.1, JERCINOVIC, M.J.2 and WILLIAMS, Michael L.2, (1)Department of Geology, Kent State Univ, Kent, OH 44242, (2)Department of Geosciences, Univ of Massachusetts, Morrill Science Center, 611 North Pleasant Street, Amherst, MA 01003-5820, pdahl@geology.kent.edu, pdahl@geology.kent.edu
10
10:15 AM
ELECTRON MICROPROBE DATING OF MONAZITE: DISSECTION OF A MULTIVARIABLE ANALYTICAL PROTOCOL, WITH APPLICATION TO "TRIPLE-POINT" ROCKS, NORTHERN PICURIS MOUNTAINS, NEW MEXICO
PYLE, Joseph M., Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, JRSC 1C25, 110 8th St, Troy, NY 12180, DANIEL, Christopher G., Department of Geology, Bucknell Univ, Lewisburg, PA 17837 and SPEAR, Frank S., Earth and Environmental Sciences, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, pylej@rpi.edu, pylej@rpi.edu
11
10:30 AM
TACONIAN AND ACADIAN RIMS ON SOUTHERN ADIRONDACK MONAZITES: HYDROTHERMAL FLUIDS FROM APPALACHIAN METAMORPHISM
STORM, Lara C. and SPEAR, Frank S., Earth and Environmental Sciences, Rensselaer Polytechnic Institute, 110 8th Street, Troy, NY 12180, storml@rpi.edu, storml@rpi.edu
12
10:45 AM
SINGLE-CRYSTAL AND WITHIN-GRAIN VARIATION IN U-TH-PB MONAZITE AND 40AR/39AR MUSCOVITE AGES FOR SAMPLES OF THE GASSETTS-TYPE SCHIST, VERMONT APPALACHIANS
HAMES, W.E., Geology and Geography, Auburn Univ, Auburn, AL 36849 and TRACY, R.J., Geological Sciences, Virginia Tech, Blacksburg, VA 24061, hameswe@auburn.edu, hameswe@auburn.edu
13
11:00 AM
PROTEROZOIC AND PALEOZOIC THERMAL HISTORY OF THE GRENVILLIAN BLUE RIDGE TERRANE, CENTRAL VIRGINIA, AS PRESERVED BY COMPLEXLY ZONED MONAZITES
LIOGYS, Viktoras A. and TRACY, Robert J., Geological Sciences, Virginia Polytechnic Institute and State Univ, 4044 Derring Hall, Blacksburg, VA 24061, vliogys@vt.edu, vliogys@vt.edu
14
11:15 AM
EMPA MONAZITE GEOCHRONOLOGY: INITIAL EXPERIENCE AND RESULTS FROM A TACONIAN AMPHIBOLITE-GRANULITE METAMORPHIC PROGRESSION, WESTERN NORTH CAROLINA BLUE RIDGE
ECKERT Jr, James O., Jr, Department of Geology & Geophysics, Yale Univ, PO Box 208109, New Haven, CT 06520-8109, 5wvsmh001@sneakemail.com, 5wvsmh001@sneakemail.com
15
11:30 AM
MONAZITE CHEMICAL AGES REVEAL MORE THAN ONE “GREAT SMOKY GROUP” IN SOUTHERN BLUE RIDGE, APPALACHIAN OROGEN
MOECHER, David P., Geological Sciences, Univ Kentucky, Lexington, KY 40506, TRACY, Robert J., Geological Sciences, Virginia Tech, Blacksburg, VA 24061-0420 and MASSEY, Matthew A., Geological Sciences, University Kentucky, Lexington, KY 40506, moker@uky.edu, moker@uky.edu
16
11:45 AM
DATING MYLONITE FORMATION USING MICROPROBE MONAZITE DATA: EXAMPLES FROM THE SOUTHERN APPALACHIANS AND NEW ENGLAND, AND A TIMS-MICROPROBE COMPARISON
TRACY, Robert J., Geological Sciences, Virginia Tech, Blacksburg, VA 24061-0420, FOUDY, John, Geological Sciences, Univ of North Carolina, Chapel Hill, NC 27599-3315 and MILLER, Brent V., Department of Geological Sciences, Univ of North Carolina, Chapel Hill, NC 27599, rtracy@vt.edu, rtracy@vt.edu
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