135435 - A multivariate approach for mapping lithospheric domain boundaries in East Antarctica.pdf (7.14 MB)
A multivariate approach for mapping lithospheric domain boundaries in East Antarctica
journal contribution
posted on 2023-05-20, 07:48 authored by Tobias StaalTobias Staal, Anya ReadingAnya Reading, Jacqueline HalpinJacqueline Halpin, Joanne WhittakerJoanne WhittakerBeneath the ice of East Antarctica lies a continent that is likely to be as geologically complex as its neighbors in Gondwana. An improved model of the heterogeneous lithosphere is required to progress research on Antarctica's tectonic evolution and support interdisciplinary studies of cryosphere and solid Earth interaction. We make use of multiple data sets, which were updated following the field campaigns and compilations of the International Polar Year of 2007/2008. Seismic tomography results, gravity anomalies, and surface elevation are used in a novel method, which combines spatial multivariate data to map possible boundaries as projected likelihood functions. Six multivariate combinations are tested and compared with sparse geological observations in East Antarctica. The resulting lithospheric domain boundaries contribute to our understanding of the deep continental structure. New boundaries are suggested in the interior, and models agree with likely surface expressions of crustal tectonic boundaries exposed along the coast.
History
Publication title
Geophysical Research LettersVolume
46Issue
17-18Pagination
10404-10416ISSN
0094-8276Department/School
School of Natural SciencesPublisher
Amer Geophysical UnionPlace of publication
2000 Florida Ave Nw, Washington, USA, Dc, 20009Rights statement
Copyright 2019 American Geophysical UnionRepository Status
- Restricted