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Characterization of Glacier Ice with GPR and Reflection Seismic at Mount Isua, GreenlandNormal access

Authors: R. Wisen, A. Almholt, U. T. Nielsen and J. Ringaard
Event name: 74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Session: Civil Engineering & Geotechnical Applications
Publication date: 04 June 2012
DOI: 10.3997/2214-4609.20148176
Organisations: SPE, EAGE
Language: English
Info: Extended abstract, PDF ( 1.54Mb )
Price: € 20

Summary:
During the summer of 2011 Rambll performed a survey of a glacier at Mount Isua in the south of Greenland, a location where there are plans to realize a large iron mine. The location of the mine is such that parts of the glacier will need to be removed in order to get access to the minerals. A combination of reflection seismic and ground penetrating radar (GPR) was used to map the position of the bedrock interface under the ice. In addition the survey provided a snapshot of the surface level of the ice, and also features within the ice, such as moraine bodies. The combination of these methods proved to be a valuable tool. One advantage of GPR is the high productivity in contrast to that for a seismic survey. For a homogeneous ice body the GPR data show a strong continuous horizon. In case of stones, water or moraine within the ice body, the GPR results are more uncertain. In this case, the seismic results show more robustness and they also penetrate much deeper into the ice than the radar data.


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