Magnetic susceptibility of West Antarctic rocks
Summary An ensemble of geophysical techniques: airborne radio echo sounding combined with magnetic and gravity measurements as well as surface seismic refraction shooting provide high levels of resolution of the sub-ice surface and its material properties and hence geological inferences. Residual ma...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.578.6218 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea020.pdf |
| Summary: | Summary An ensemble of geophysical techniques: airborne radio echo sounding combined with magnetic and gravity measurements as well as surface seismic refraction shooting provide high levels of resolution of the sub-ice surface and its material properties and hence geological inferences. Residual magnetic anomaly fields are produced by variations in the distribution of magnetised material in the uppermost crustal layers. In order to model possible structures and geological units from magnetic surveys magnetic susceptibilities are required. During long-range airborne geophysical missions in the later 1970s by the Scott Polar Research Institute in conjunction with National Science Foundation and Technical University of Denmark magnetic data were collected over West Antarctica and have been reported by Jankowski (1981). To assist their interpretation magnetic susceptibility measurements were made of rocks specimens from West Antarctic outcrops collected or assembled by Cam Craddock and examples of their use in the modelling the geophysical architecture of West Antarctica are outlined. Citation: Drewry, D. J. and E. J. Jankowski (2007), Magnetic susceptibility of West Antarctic rocks, in Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES X, edited by A. K. Cooper and C. R. Raymond et al., USGS |
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