The PIs propose to use airborne geophysics to provide detailed geophysical mapping over the Marie Byrd Land dome of West Antarctica. They will use a Basler equipped with advanced ice penetrating radar, a magnetometer, an airborne gravimeter and laser altimeter. They will test models of Marie Byrd Land lithospheric evolution in three ways: 1) constrain bedrock topography and crustal structure of central Marie Byrd Land for the first time; 2) map subglacial geomorphology of Marie Byrd Land to constrain landscape evolution; and 3) map the distribution of subglacial volcanic centers and identify active sources. Marie Byrd Land is one of the few parts of West Antarctica whose bedrock lies above sea level; as such, it has a key role to play in the formation and decay of the West Antarctic Ice Sheet (WAIS), and thus on eustatic sea level change during the Neogene. Several lines of evidence suggest that the topography of Marie Byrd Land has changed over the course of the Cenozoic, with significant implications for the origin and evolution of the ice sheet. Information on data for the project at the USAP-Data Center: https://www.usap-dc.org/view/project/p0000435
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Jun 28, 2024
Young, Duncan A.; Blankenship, Donald D.; Greenbaum, Jamin S.; Quartini, Enrica; Muldoon, Gail L; Habbal, Feras; Lindzey, Laura E.; Greene, Chad A.; Powell, Evelyn M.; Ng, Gregory C.; Richter, Thomas G.; Echeverry, Gonzalo; Kempf, Scott, 2024, "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE) Airborne VHF Radar Transects: 2012/2013 and 2014/2015", https://doi.org/10.18738/T8/BMXUHX, Texas Data Repository, V1
Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE) The PIs propose to use airborne geophysics to provide detailed geophysical mapping over the Marie Byrd Land dome of West Antarctica. They will use a Basler equipped with advanced ice penetrating radar,...
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