2026-05-27T22:27:25Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:78062023-10-10T13:02:02ZDOIDBDOIDB.GFZ

false4DOIDB.GFZ 10.5880/GFZ.2.5.2023.004 Steinberger, Bernhard Bernhard Steinberger 0000-0002-3643-3049 GFZ German Research Centre for Geosciences, Potsdam, Germany GFZ Data Services 2023 mantle plume hotspot mantle flow mantle processes West Antarctica EARTH SCIENCE > SOLID EARTH EARTH SCIENCE SERVICES > MODELS Steinberger, Bernhard Bernhard Steinberger 0000-0002-3643-3049 GFZ German Research Centre for Geosciences, Potsdam, Germany Steinberger, Bernhard GFZ German Research Centre for Geosciences, Potsdam, Germany Steinberger, Bernhard GFZ German Research Centre for Geosciences, Potsdam, Germany Dataset 10.55575/tektonika2023.1.2.35 CC BY 4.0 In order to test the feasibility of density and viscosity models suitable to explain geoid and dynamic topography in West Antarctica, we perform computations of a thermal plume that enters at the base of a cartesian box corresponding to a region in the upper mantle, as well as some whole-mantle thermal plume models, as well as some instantaneous disk models, with ASPECT. The plume models have typically a narrow conduit and the plume tends to only become wider as it spreads beneath the lithosphere, typically shallower than ~300 km. These results are most consistent with a shallow disk model with reduced uppermost mantle viscosity, hence providing further support for such low viscosities beneath West Antarctica.

The data are a supplement to the following article: Steinberger, B., Grasnick, M.-L. & Ludwig, R.,
Exploring the Origin of Geoid Low and Topography High in West Antarctica: Insights from Density Anomalies and Mantle Convection Models,
Tektonika, https://doi.org/10.55575/tektonika2023.1.2.35

Model coverage (West Antarctica) -50 130 -83.2777 -62.5933