Isotopic composition of vent discharge from the Matanuska Glacier, Alaska: Implications for the origin of basal ice

Daniel D. Titus, Grahame J. Larson, Jeffrey C. Strasser, Daniel E. Lawson, Edward B. Evenson, Richard B. Alley

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

The 18O, D composition, and 3H activity was measured in subglacial discharge samples collected during the summer of 1995 from vents along the margin of the Matanuska Glacier, Alaska. Application of a simple open two-component reservoir model indicates that 18δO, δD, and 3H activity for discharge are within the requisite ranges to form basal ice, and that there is a genetic relationship between the two. Additionally, the temporal variability of δ18O in the basal ice can be attributed to relative amounts of meltwater and rainfall runoff present in the subglacial discharge.

Original languageEnglish (US)
Pages (from-to)37-44
Number of pages8
JournalSpecial Paper of the Geological Society of America
Volume337
DOIs
StatePublished - Jan 1 1999

All Science Journal Classification (ASJC) codes

  • Geology

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