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 National Science
Foundation Award #9118494 |
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Helium and Rare Gas Studies and Krypton-81 Ages at Vostok |
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| Investigator(s): |
Harmon Craig (PI)
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| Sponsor: |
University of California-San Diego, CA 92093 8585340246
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| Start Date/Expiration Date |
1992-01-01 to 1997-12-31 (amended 1996-12-23) |
| Awarded Amount to Date: |
$259,887 |
| Abstract: This award is for support of a project to measure the helium concentrations and isotope ratios, K/Ar ratios, and Krypton 81 ages in ice from Vostok Station, Antarctica. The helium program is a search for nulls and/or reversals of the Earth's magnetic field, which should leave a strong signal in the helium 3 to helium 4 ratios and the helium 3 concentrations in ice core helium. If a geomagnetic helium event is recorded in the ice sheets, it will provide a world-wide traceable horizon in both Greenland and Antarctica, for model studies of ice flow and for chronology. The Kr/Ar measurements are to study gravitational fractionation of gases in the firn. The Krypton 81 dating will provide the first absolute age on the Vostok core. |
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| NSF Org: |
OPP - Office of Polar Programs |
| Award Number: |
9118494 |
| Award Instrument: |
Continuing grant |
| Program Manager: |
Julie Palais
OPP Office of Polar Programs
O/D OFFICE OF THE DIRECTOR
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| NSF Program(s): |
ANTARCTIC GLACIOLOGY |
| Field Application(s): |
Geological Sciences, Polar Programs-Related |
| Program Reference Code(s): |
EARTH SYSTEM HISTORY, 1304
UNASSIGNED, 0000 |
| Program Element Code(s): |
5116 |
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