Glacial Till Detection Experiments With Transient Electromagnetic Methods
Abstract
Transient Electromagnetic (TEM) investigations have been carried out on Fireweed Rock Glacier in Wrangell-St. Elias National Park, Alaska and the East Fork Toklat Glacier in Denali National Park, Alaska. TEM methods were effective in determining the geometry of the rock glacier but were more limited in resolution on the ice glacier. A conductive layer beneath the rock glacier was identified, and its distribution is consistent with a till-like layer. A similar layer was not detected beneath the glacier; the lack of this conductive layer limits the resolution of glacial depth. These experiments and forward modeling indicate that TEM methods may provide a means for detecting a sufficiently thick and conductive till layer beneath glaciers and rock glaciers.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2003
- Bibcode:
- 2003AGUFM.C31B0396B
- Keywords:
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- 1827 Glaciology (1863)