Subglacial geology of Halvfarryggen ice dome, Antarctia, inferred from seismic measurements

We carried out a combined vibro-explosive seismic survey on Halvfarryggen, a local ice dome south of Neumayer III. The Vibroseis survey was grid shaped to provide spatial information about the glaciological and geological substructure. The center survey line was also surveyed with explosive reflecti...

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Bibliographic Details
Main Authors: Eisen, Olaf, Hofstede, Coen, Diez, Anja, Kristoffersen, Yngve
Format: Conference Object
Language:unknown
Published: Deutsche Gesellschaft für Polarforschung 2013
Subjects:
Halvfarryggen
Neumayer
Antarc*
Polarforschung
Online Access:https://epic.awi.de/id/eprint/31898/
https://hdl.handle.net/10013/epic.41260
Description
Summary:We carried out a combined vibro-explosive seismic survey on Halvfarryggen, a local ice dome south of Neumayer III. The Vibroseis survey was grid shaped to provide spatial information about the glaciological and geological substructure. The center survey line was also surveyed with explosive reflection and refraction seismic set-ups. The ice bed contact we interpret as a frozen till layer overlaying bedrock. Velocity analysis from refractions seen in far offset data, we obtain a pressure-wave velocity >5000 m/s. We therefore interpret the bedrock as igneous.

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