GSA Annual Meeting in Seattle, Washington, USA - 2017

Session No. 20
Sunday, 22 October 2017: 8:00 AM-12:00 PM
Skagit 3 (The Conference Center)

T158. Gemological Research in the 21st Century—Characterization, Exploration, and Geological Significance of Diamonds and other Gem Minerals

Gemological Institute of America
Caroline Nelms, James E. Shigley, Dona Dirlam, Wuyi Wang, Barbara L. Dutrow, Rodney C. Ewing, Jeffrey E. Post, Steven B. Shirey, William B. Simmons, John Valley and Lee A. Groat, Advocates
 
8:00 AM
Introductory Remarks
8:05 AM
TYPE IIB BORON-BEARING DIAMONDS ARE SUPERDEEP DIAMONDS (Invited Presentation)
SMITH, Evan M., Gemological Institute of America, 50 W 47th Street, New York, NY 10036, SHIREY, Steven B., Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, NESTOLA, Fabrizio, Dipartimento di Geoscienze, Universita di Padua, Via Giotto 1, Padova, 35137, Italy, RICHARDSON, Stephen H., Department of Geosciences, University of Cape Town, Rondebosch, 7701, South Africa and WANG, Wuyi, Gemological Institute of America, 50 west 47 Street, New York, NY 10036, evan.smith@gia.edu
8:25 AM
DIAMOND PROVENANCE DETERMINED BY MULTIVARIATE ANALYSIS OF LIBS SPECTRA: NEW INSIGHTS TO DIAMOND CHEMISTRY
MCMANUS, Catherine E., Materialytics, LLC, P.O. Box 10988, Killeen, TX 76547 and MCMILLAN, Nancy J., Geological Sciences, New Mexico State University, Box 30001 MSC 3AB, Las Cruces, NM 88003, nmcmilla@nmsu.edu
8:40 AM
SPATIAL MAPPING OF TEMPERATURE AND IRRADIATION EFFECTS IN NATURAL TYPE IIB DIAMOND
EATON-MAGANA, Sally, Gemological Institute of America, Carlsbad, CA 92653 and ARDON, Troy, Gemological Institute of America, Carlsbad, CA 92008, smagana@gia.edu
8:55 AM
TRACE ELEMENTS IN GEM-QUALITY DIAMONDS – ORIGIN AND EVOLUTION OF DIAMOND-FORMING FLUIDS
KREBS, Mandy Y.1, PEARSON, D. Graham2, STACHEL, Thomas3, WOODLAND, Sarah J.2, CHINN, Ingrid4 and KONG, Julie5, (1)Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, AB T6G2E3, Canada, (2)Earth and Atmospheric Sciences, University of Alberta, 1-26 Earth Sciences Building, Edmonton, AB T6G 2E3, Canada, (3)Earth and Atmospheric Sciences, University of Alberta, 1-24 ESB, Edmonton, AB T6G 2E3, Canada, (4)De Beers Group Exploration, Johannesburg, 2193, South Africa, (5)De Beers Canada, Calgary, AB T2E 6Z8, Canada, krebs@ualberta.ca
9:10 AM
DIAMOND GROWTH IN ALKALI BRINES
STRAWSON, Melissa, STONE, Rebecca and LUTH, Robert, Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada, rsstone@ualberta.ca
9:25 AM
DIAMOND FORMATION DURING PARTIAL MELTING IN THE EARTH’S MANTLE
LUTH, Robert, Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada, robert.luth@ualberta.ca
 
9:40 AM
Break
9:55 AM
THE GEOLOGIC NARRATIVES OF GEM TOURMALINES: IMPRINTS OF CRUSTAL EVOLUTION (Invited Presentation)
HENRY, Darrell J., Dept. of Geology and Geophysics, Louisiana State University, Baton Rouge, LA 70803 and DUTROW, Barbara L., Department of Geology & Geophysics, Louisiana State University, Baton Rouge, LA 70803, glhenr@lsu.edu
10:15 AM
HEAT TREATMENT OF GEM QUALITY ANDRADITE (VAR. DEMANTOID): IS INTERVALENCE CHARGE TRANSFER NECESSARY FOR BROWN COLORATION IN ANDRADITE?
PALKE, Aaron, Gemological Institute of America, 5355 Armada Drive, Carlsbad, CA 92008 and ROSSMAN, George R., Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125-2500, aaronpalke@gmail.com
10:30 AM
THE ROLE OF METAMORPHIC AND GEOCHEMICAL FACTORS IN GEM SPINEL GENESIS
BELLEY, Philippe M., Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada and GROAT, Lee A., Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada, phil.belley@gmail.com
10:45 AM
ARE THERE "COLOMBIAN-TYPE" EMERALDS IN CANADA'S NORTHERN CORDILLERA?
LAKE, Donald J., Earth, Ocean, and Atmospheric Sciences, The University of British Columbia, Vancouver, BC V6T1Z4, Canada and GROAT, Lee A., Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada, dlake@eoas.ubc.ca
11:00 AM
EMPIRICAL CALIBRATION OF OXYGEN ISOTOPE FRACTIONATION IN CORUNDUM
TURNIER, Rachelle B., Department of Geoscience, University of Wisconsin-Madison, 1215 W Dayton Street, Madison, WI 53706, KATZIR, Yaron, Department of Geological and Environmental Sciences, Ben Gurion University of the Negev, Be'er Sheva, 8410501, Israel, KITAJIMA, Kouki, NASA Astrobiology Institute & WiscSIMS, Department of Geoscience, University of Wisconsin-Madison, 1215 West Dayton Street, Madison, WI 53706, ORLAND, Ian J., WiscSIMS, Department of Geoscience, University of Wisconsin–Madison, 1215 W Dayton Street, Madison, WI 53706, SPICUZZA, Michael J., NASA Astrobiology Institute & WiscSIMS, Department of Geoscience, University of Wisconsin–Madison, Madison, WI 53706 and VALLEY, John W., Department of Geoscience, University of Wisconsin, 1215 West Dayton Street, Madison, WI 53706, turnier@wisc.edu
11:15 AM
MATRIX-MATCHED CORUNDUM STANDARDS FOR KEY TRACE ELEMENTS IN RUBY AND SAPPHIRE
STONE-SUNDBERG, Jennifer, Research, Gemological Institute of America, 5355 Armada Drive, Carlsbad, CA 92008, SUN, Ziyin, Gemological Institute of America (GIA), 5355 Armada Dr, Carlsbad, CA 92008, GUAN, Yunbin, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, COLE, Zachary, Scientific Materials, a division of FLIR Surveillance, Inc., 31948 E. Frontage Road, Bozeman, MT 59715 and EMMETT, John, Crystal Chemistry, Brush Prairie, WA 98606, jstone@gia.edu
 
11:30 AM
Discussion
 
11:45 AM
Concluding Remarks
See more of: Technical Sessions