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

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...

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Bibliographic Details
Main Authors: Hofstede, Coen, Diez, Anja, Eisen, Olaf, Jansen, Daniela, Kristoffersen, Yngve
Format: Conference Object
Language:unknown
Published: AGU 2012
Subjects:
Antarctic
East Antarctica
Halvfarryggen
Antarc*
Antarctica
Online Access:https://epic.awi.de/id/eprint/31890/
https://hdl.handle.net/10013/epic.40599
Description
Summary: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.

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