GSA 2020 Connects Online

Session No. 85
Tuesday, 27 October 2020: 1:30 PM-5:30 PM

T111. Using Paired Single-Mineral Geochronology and Geochemistry to Address Tectonic Problems from the Mid-Crust to Earth’s Surface

GSA Geochronology Division; GSA Structural Geology and Tectonics Division

 

Kristina Lynn Butler, Margaret Odlum and Sarah W.M. George, Advocates
Paper #
Start Time
 
1:30 PM
Introductory Remarks
1:35 PM
TWO-STAGE EXHUMATION OF THE HIMALAYAN METAMORPHIC CORE: INSIGHTS FROM GREATER HIMALAYAN ROCKS IN CENTRAL AND EASTERN BHUTAN (Invited Presentation)
GORDON, Stacia M.1, ZAMORA, Carolina L.2, KAUFFMAN, Rick1, GONZALES-CLAYTON, Rebecca1 and LONG, Sean P.3, (1)Department of Geological Sciences and Engineering, University of Nevada, Reno, 1664 N. Virginia Street, MS0172, Reno, NV 89557, (2)University of Nevada, Reno, 1664 N. Virgina, Reno, NV 89557; Department of Geological Sciences and Engineering, University of Nevada, Reno, 1664 N. Virginia Street, MS0172, Reno, NV 89557, (3)School of the Environment, Washington State University, Pullman, WA 99164
1:50 PM
ZIRCON U-PB AND TRACE-ELEMENT SIGNATURES IN HIGH-PRESSURE METAMORPHIC ROCKS AS RECORDERS OF SUBDUCTION AND EXHUMATION PROCESSES, SIKINOS AND IOS ISLANDS (CYCLADES, GREECE)
POULAKI, Eirini M.1, STOCKLI, Daniel F.2, FLANSBURG, Megan E.1, GEVEDON, Michelle3, SOUKIS, Konstantinos4, STOCKLI, Lisa D.5, BARNES, Jaime D.6, KITAJIMA, Kouki7 and VALLEY, John W.7, (1)Department of Geological Sciences, The Jackson School of Geosciences at The University of Texas at Austin, 23 San Jacinto Blvd & E 23rd St, Austin, TX 78712, (2)Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78712, (3)Department of Earth Sciences, Southern Methodist University, Dallas, TX 75275, (4)Dept. of Geology and Geoenvironment, University of Athens, Athens, Greece, (5)Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX 78712, (6)Department of Geological Sciences, The University of Texas at Austin, Austin, TX 78712, (7)Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton Street, Madison, WI 53706
2:05 PM
FARALLON SLAB REMOVAL AS A DRIVING FORCE OF CORDILLERAN METAMORPHIC CORE COMPLEX FORMATION: DETAILS FROM THE ANACONDA RANGE OF WESTERN MONTANA
HOWLETT, Caden J., REYNOLDS, Aislin N. and LASKOWSKI, Andrew K., Department of Earth Sciences, Montana State University, 226 Traphagen Hall, P.O. Box 173480, Bozeman, MT 59717-3480
2:20 PM
RESOLVING MID- TO UPPER-CRUSTAL EXHUMATION THROUGH APATITE PETROCHRONOLOGY
JEPSON, Gilby1, CARRAPA, Barbara2, GEORGE, S.W.M.1, TRIANTAFYLLOU, Antoine3, DUCEA, Mihai N.4, EGAN, Shana M.5, GEHRELS, G.E.5 and CONSTENIUS, Kurt N.6, (1)Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, AZ 85721, (2)Geosciences, University of Arizona, Gould-Simpson Building #77, 1040 E 4th St, Tucson, AZ 85721, (3)Department of Geosciences, University of Arizona, Tucson, AZ 85721; Department of Geology, University of Liège, Department of Geology, University of Liège, 4000 Sart Tilman, Belgium, Liège, 4000, Belgium, (4)Faculty of Geology and Geophysics, University of Bucharest, Bucharest, 011004, Romania, (5)Department of Geosciences, University of Arizona, Tucson, AZ 85721, (6)Tucson, AZ 85721
 
2:35 PM
Discussion
2:55 PM
USING SKARN GARNET U-PB AGES AND OXYGEN ISOTOPES TO UNDERSTAND FLUID SOURCES AND THE PALEOGEOGRAPHY OF THE JURASSIC MOJAVE SEGMENT OF THE NORTH AMERICAN CORDILLERAN MARGIN ARC (Invited Presentation)
GEVEDON, Michelle1, LACKEY, Jade Star2, BARNES, Jaime D.3, MCCARTY, Kyle R.2, KITAJIMA, Kouki4 and VALLEY, John W.4, (1)Department of Earth Sciences, Southern Methodist University, Dallas, TX 75275, (2)Geology Department, Pomona College, Claremont, CA 91711, (3)Department of Geological Sciences, The University of Texas at Austin, Austin, TX 78712, (4)Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706
3:10 PM
PB ISOTOPIC VARIATION OF CRETACEOUS ARC CRUST IN THE PACIFIC NORTHWEST, U.S.A. AND CANADA
ISAVA, Virginia1, GROVE, Marty1 and MAHONEY, J. Brian2, (1)Department of Geological Sciences, Stanford University, Stanford, CA 94305, (2)Geology, University of Wisconsin - Eau Claire, Eau Claire, WI 54703
 
3:25 PM
Discussion
3:40 PM
PROVENANCE ANALYSIS OF EOCENE TO MIOCENE SEDIMENTARY STRATA DERIVED FROM THE CENTRAL ALPS - INSIGHTS FROM DETRITAL ZIRCON LASER ABLATION SPLIT STREAM (LASS)-ICP-MS DEPTH-PROFILING (Invited Presentation)
ANFINSON, Owen A., Department of Geology, Sonoma State University, 1801 East Cotati Ave, Rohnert Park, CA 94928, STOCKLI, Daniel F., Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78712, SCHLUNEGGER, Fritz, Institut für Geologie, Universität Bern, Baltzerstr. 1+3, Bern, 3012, Switzerland and MALUSA, Marco G., Department of Earth and Environmental Sciences, Universita' di Milano-Bicocca, Milan, Italy
3:55 PM
HINTERLAND BASIN GEODYNAMICS: IMPLICATIONS OF LU-HF AND U-PB ANALYSES OF ZIRCON FROM THE TINCOPALCA BASIN, PERU
EDEN, Ryan Patrick, Department of Geosciences, University of Arizona, 1040 E 4th St, Tucson, AZ 85721, SUNDELL, Kurt E., Dept. of Geosciences, University of Arizona, Tucson, AZ 85721, GEHRELS, George E., Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, AZ 85721 and SAYLOR, Joel E., Department of Earth, Ocean and Atmospheric Sciences, University of British Colombia, Vancouver, BC V6T 1Z4, Canada
4:10 PM
FINGERPRINTING GONDWANA VIA BIVARIATE QUANTITATIVE ANALYSIS OF JOINT ZIRCON U-PB AND HF GLOBAL ARCHIVES
SUNDELL, Kurt, Department of Geosciences, University of Arizona, Tucson, AZ 85721, SAYLOR, Joel, Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T1Z4, Canada and MACDONALD, Francis A., Department of Earth Science, University of California Santa Barbara, Santa Barbara, CA 93109
 
4:25 PM
Discussion
4:45 PM
TRACKING THE HISTORY OF MAGMA PRODUCTION AND INTRUSION ACROSS IDAHO USING 40 MILLION YEARS OF TEPHRAGENIC ZIRCON
HANNON, Jeffrey S., Dept. of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, DIETSCH, C., 500 Geology-Physics, University of Cincinnati, Cincinnati, OH 45221-0013 and HUFF, Warren D., Dept. of Geology, Univ of Cincinnati, Cincinnati, OH 45221
4:55 PM
RECONSTRUCTING EOCENE PALEOTOPOGRAPHY OF THE ROCKY MOUNTAINS USING STABLE ISOTOPE PALEOALTIMETRY OF HYDRATED VOLCANIC GLASS
YOUNG-DAHL, Erin Elisabeth, Geological Sciences, University of Idaho, 875 Perimeter Dr, MS 3022, Moscow, ID 83844, CASSEL, Elizabeth J., Geological Sciences, University of Idaho, 875 Perimeter Drive MS 3022, Moscow, ID 83844 and SMITH, M. Elliot, School of Earth and Sustainability, Northern Arizona University, 625 Knoles Drive, Box 4099, Flagstaff, AZ 86011
 
5:05 PM
Discussion
 
5:15 PM
Concluding Remarks
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