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


Contact
Olaf.Eisen [ at ] awi.de

Abstract

We carried out a combined vibro-explosive seismic survey on Halvfarryggen, a local ice dome south of the German research station 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. From velocity analysis of refractions seen in far offset data, we obtain a pressure-wave velocity >5000 m/s. We therefore interpret the bedrock as igneous, which supplements previous magnetic and gravimetric data sets.



Item Type
Conference (Poster)
Authors
Divisions
Primary Division
Programs
Primary Topic
Peer revision
Not peer-reviewed
Publication Status
Published
Event Details
EGU General Assembly, 07 Apr 2013 - 12 Apr 2013, Vienna.
Eprint ID
30528
Cite as
Eisen, O. , Hofstede, C. , Diez, A. and Kristoffersen, Y. (2013): Subglacial geology of Halvfarryggen ice dome, Antarctia, inferred from seismic measurements , EGU General Assembly, Vienna, 7 April 2013 - 12 April 2013 .


Download
[img]
Preview
PDF
EGU2013-2887-2.pdf

Download (34kB) | Preview
Cite this document as:

Share

Research Platforms

Campaigns


Actions
Edit Item Edit Item