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  Geophysical mapping of the southern flank of Dome A, Antarctica: Initial results from the inaugural COLDEX airborne survey

Kerr, M., Young, D., Richter, T., Blankenship, D., Buhl, D., Chan, K., Greenbaum, J., Kaundinya, S., Kempf, S., Liu-Schiaffini, M., Ng, G., Paden, J., Yan, S. (2023): Geophysical mapping of the southern flank of Dome A, Antarctica: Initial results from the inaugural COLDEX airborne survey, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4460

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021889 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021889_1
Genre: Conference Paper

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 Creators:
Kerr, Megan1, Author
Young, Duncan1, Author
Richter, Thomas1, Author
Blankenship, Donald1, Author
Buhl, Dillon1, Author
Chan, Kristian1, Author
Greenbaum, Jamin1, Author
Kaundinya, Shravan1, Author
Kempf, Scott1, Author
Liu-Schiaffini, Miguel1, Author
Ng, Gregory1, Author
Paden, John1, Author
Yan, Shuai1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: The acquisition of a stratigraphically intact Antarctic ice column spanning the past 1.5 million years requires understanding of the thermal state of both the basal layer of the ice sheet and the underlying bed, which are influenced strongly by the coupled boundary conditions of geothermal heat flow and accumulation rate. However, geothermal heat flow, crustal structure, lithology, and other geological controls on thermal and hydraulic conductivity are poorly understood for likely ‘old ice’ regions of Antarctica. In the 2022/23 Antarctic field season, we collected over 20,000 line km of new airborne radar, magnetics, and gravity data over a poorly-surveyed region of the East Antarctic Ice Sheet between Dome A and the South Pole. We present updated maps of subglacial topography and ice thickness, as well as free-air and Bouguer anomaly grids, which can be used to make preliminary inferences about the crustal framework and basal thermal regime of the study area. These data, supplemented by existing geophysical observations, will inform further airborne and ground-based geophysical surveys and provide important context for ice flow models and selection of potential sites for old ice drilling operations.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4460
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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