Return to 1996 Spring Meeting
Summary
SESSION GS21A
CC:306
, Tues
Innovative Applications of 40Ar/39Ar Microanalytical Research (joint with V)
PRESIDING: W E Hames, Auburn Univ; S P Kelly, Open Univ
0830h
GS21A-01 INVITED
Stratigraphic 40Ar-39Ar Geochronology Using a Laser Microprobe
*I McDougall
0900h
GS21A-02 INVITED
Recent Advances in 40Ar/39Ar Geochronology of Quaternary Volcanic Rocks
*M S Pringle, B S Singer
0920h
GS21A-03 INVITED
Excess Argon in Melt Inclusions in Young (<250 ka) Anorthoclase Feldspar From Mt. Erebus, Antarctica, as Revealed by the 40Ar/39Ar Method
*R P Esser, W C McIntosh, M T Heizler, P R Kyle
0940h
GS21A-04 INVITED
Managing Excess 40Ar in Melt Inclusions in Young Sanidine and Anorthoclase: A Return to Bulk Methods
*W C McIntosh, R P Esser, T I Wilch
1020h
GS21A-05
Evidence of Spatial and Temporal Variations in Argon Isotope Compositions in Grain Boundaries
*C S Pickles, S P Kelley, S M Reddy, J Wheeler
1040h
GS21A-06 INVITED
Muscovite Age Gradients
*M T Heizler, S Ralser
1100h
GS21A-07 INVITED
Styles of Episodic and Slow Cooling 40Ar-Loss in Muscovite
W E Hames, J T Cheney
1120h
GS21A-08
40Ar/39Ar Laser Mapping of Hornblende Porphyroclasts From the Panafrican Dahomeyide Orogen, West Africa
M House, *K Attoh
1140h
GS21A-09
A Glimpse of Multiple Diffusion Domain Closure in K-feldspar
*A C Warnock, P K Zeitler
SESSION GS22A
CC:306
, Tues
Innovative Applications of 40Ar/39Ar Microanalytical Research (joint with V)
PRESIDING: S P Kelly, Open Univ; W E Hames, Auburn Univ
1330h
GS22A-01 INVITED
Applications for UV Laser Microprobe to 40Ar/39Ar Dating of Fine-Grained Diagenetic Minerals
T C Onstott, H Cohen, C Miller, J Golden
1400h
GS22A-02 INVITED
Laser 40Ar/39Ar Micro-Sampling of Illite Using Vacuum Encapsulated Irradiation
H Dong, *C M Hall, D R Peacor, A N Halliday
1420h
GS22A-03 INVITED
40Ar/39Ar Laser Probe Dating of Weathering Phenomena
O Henoque, F Colin, G Ruffet, *G Feraud
1500h
GS22A-04 INVITED
A Combined Ar-Ar and I-Xe Laser Probe Study of the Ancient Crust of Mars
*G Turner, J Gilmour, R Ash, S Knott
1530h
GS22A-05 INVITED
Progress Report on Ar Isotopic Analysis of Neutron-Activated Apollo 11 Lunar Spherules: Using 40Ar/39Ar and Cosmic Ray Exposure Ages to Constrain the Moon's Cratering History
T S Culler, R A Muller, P Renne, T A Becker, A L Deino, J Donovan
1550h
GS22A-06 INVITED
The Effect of Argon Partition Between Minerals and Melts Upon Ar-Ar Geochronology, Illuminated by UVLAMP
*S P Kelley, J Wartho
1610h
GS22A-07
40Ar/39Ar Laser-Probe Analyses of Mantle Xenocrysts: Implications for Mantle Volatile Geochemistry
*D Phillips
1630h
GS22A-08
Why Must 1000 km-scale Tectonic Models Take Into Account 100 nm-scale Recoil? The 39Ar Fairy Tale
*I M Villa
SESSION GS31A
CC:Hall
, Wed
Innovative Applications of 40Ar/39Ar Microanalytical Research - Posters (joint with V)
PRESIDING: W E Hames, Auburn Univ; S P Kelly, Open Univ
0830h
GS31A-01 INVITED
POSTER 40Ar/39Ar Geochronology of (Altered) Volcanic Rocks: Comparison of Furnace- and Laser-Heating Techniques
*M S Pringle, R A Duncan, C Mitchell, J Wijbrans
0830h
GS31A-02 POSTER
Successful 40Ar/39Ar Laser Probe Dating of Whole Rock Basalts Affected by 39Ar Recoil
G Feraud, C Hofmann, V Alric
0830h
GS31A-03 POSTER
Laser Fusion and Incremental Heating 40Ar/39Ar Study of Hornblende, Biotite, Muscovite, and Feldspar in an Orogenic Terrain With a 200 Million Year Cooling History, Lofoten, Norway
*W E Hames, A Andresen
SESSION GS31B
CC:Hall
, Wed
Aqueous/Isotope Geochemistry - Posters (joint with H)
PRESIDING: N C Sturchio, Argonne National Lab
0830h
GS31B-01 POSTER
Determining the Atomic Structure of Submonolayer Metal Adsorbates at Mineral-Water Interfaces
*N C Sturchio, P Lyman, L Cheng, M Bedzyk, R P Chiarello, L Sorensen, M P Geissbuhler, D Yee
0830h
GS31B-02 POSTER
Toward Comprehensive Chemical Weathering Budgets for the Hubbard Brook Sandbox Experiment, New Hampshire
*M F Cochran, R April, F H Bormann, T Rozan, R Berner, B Bormann, B Bowden, M Snyder, D Wang
0830h
GS31B-03 POSTER
Uranium-Series Disequilibria at the Nopal I Uranium Deposit, Pena Blanca District, Mexico: Implications for Episodic Radionuclide Transport at a Geological Repository for High-Level Nuclear Waste
*D A Pickett, J D Prikryl, E C Pearcy
0830h
GS31B-04 POSTER
Isotopic Constraints on Biogeochemical Cycling in Carbonate-Precipitating Microbial Mats
*G F Slater, B Sherwood Lollar, F G Ferris, J Gerits