Monday, 27 August 2007
1.PS-5
Stable isotopic and foraminiferal evidence of Larsen-B Ice Shelf stability throughout the Holocene
Scott E. Ishman, Geology, Southern Illinois University-Carbondale, Parkinson Lab 303, Mail Code 4324, Carbondale, IL 62901, Mike Prentice, Indiana Geological Survey, Bloomington, IN 47405, Scott McCallum, Equitable Production, 225 North Shore Drive, Pittsburgh, PA 15212, Eugene W. Domack, Geosciences, Hamilton College, 198 College Hill Road, Clinton, NY 13323, Amy Leventer, Geology Department, Colgate University, 13 Oak Drive, Hamilton, NY 13346, and Veronica Willmott, Department of Geosciences, Hamilton College, 198 College Hill Rd., Clinton, NY 13323.
Kasten cores collected during the NBP01-07, LMG05-02 and NBP06-03 cruises to the Larsen-B Ice Shelf region, eastern Antarctic Peninsula contain sediments recording its Holocene history. Benthic foraminiferal transfer function analyses of the kasten core samples indicate persistent ice shelf conditions throughout the Holocene. Planktonic and benthic foraminiferal δ18O stable isotopic analyses also indicate persistent ice shelf conditions with gradual melting resulting in freshening of the regional oceanography, independent of global Holocene isotopic shifts.