Sourcing Antarctic ice rafted debris: potential and pitfalls for recording past ice sheet dynamics

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• Dr. Michael Flowerdew
• Monday 21 January 2013, 17:00-18:00
• Harker Room 1, Department of Earth Sciences.

If you have a question about this talk, please contact Lois Salem.

The age, composition and shifts in the provenance of ice rafted debris can potentially independently test models for the past evolution of ice sheets. Interpreting Antarctic derived material is, however, compromised by its largely unknown geology, an apparent lack of suitable provenance techniques and an incomplete understanding of subglacial processes. As shall be shown, possible solutions to these shortcomings can come through measuring the Pb isotopic composition of ice rafted feldspars. The resulting improved provenance signal can help identify regions where subglacial erosion has occurred but ultimately, any interpretation from ice rafted material must be treated with caution until the concealed geology is better understood.

This talk is part of the Sedgwick Club talks series.

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• Department of Earth Sciences seminars
• Harker Room 1, Department of Earth Sciences
• Sedgwick Club talks

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