A combined Vibroseis-Explosive survey at Halvfarryggen, a local ice dome in East Antarctica


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Coen.Hofstede [ at ] awi.de

Abstract

We carried out a combined Vibroseis-Explosive survey in combination with a snowstreamer at Halvfarryggen, a local ice dome at a triple point in the vicinity of the German Antarctic research station NeumayerIII. The Vibroseis survey was grid shaped to give spatial information about the glaciological and geological substructure. The center survey line was also surveyed with explosives and compared with the Vibroseis data. Internal ice reflections, clearly visible with explosives are not well visible in the Vibroseis data except for the strongest and deepest internal reflection. We interpret this deepest internal ice reflector as ice crystals orientated in to a single maximum. The ice bed contact we interpret as a frozen till layer overlaying bedrock. From velocity analysis derived from refractions seen in far offset data, we interpret the bedrock as igneous.



Item Type
Conference (Poster)
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Not peer-reviewed
Publication Status
Published
Event Details
AGU Fall Meeting, 02 Dec 2012 - 07 Dec 2012, San Francisco.
Eprint ID
31890
Cite as
Hofstede, C. , Diez, A. , Eisen, O. , Jansen, D. and Kristoffersen, Y. (2012): A combined Vibroseis-Explosive survey at Halvfarryggen, a local ice dome in East Antarctica , AGU Fall Meeting, San Francisco, 2 December 2012 - 7 December 2012 .


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