Stable Isotopes and Debris in Basal Glacier Ice, South Georgia, Southern Ocean
Abstract This paper combines a study of the rock debris and δD/δ 18 O isotopic characteristics of basal ice sequences in three representative glaciers in South Georgia and concludes that the debris and ice has been entrained mainly by basal freezing. The size distribution of the rock debris is typic...
| Published in: | Journal of Glaciology |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Cambridge University Press (CUP)
1987
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| Subjects: | |
| Online Access: | http://dx.doi.org/10.1017/s0022143000008911 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000008911 |
| Summary: | Abstract This paper combines a study of the rock debris and δD/δ 18 O isotopic characteristics of basal ice sequences in three representative glaciers in South Georgia and concludes that the debris and ice has been entrained mainly by basal freezing. The size distribution of the rock debris is typical of crushing and abrasion, and reflects transport at the ice–rock interface. The δD/δ 18 O relationships show that clear ice associated with the debris has accreted through freezing. The white bubbly glacier ice has δD/δ 18 O relationships typical of precipitation which demonstrates an altitudinal effect between glaciers. |
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