East Antarctica magnetically linked to its ancient neighbours in Gondwana

We present a new magnetic compilation for Central Gondwana conformed to a recent satellite magnetic model (LCS-1) with the help of an equivalent layer approach, resulting in consistent levels, corrections that have not previously been applied. Additionally, we use the satellite data to its full spec...

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Bibliographic Details
Published in:Scientific Reports
Main Authors: Ebbing, Jörg, Dilixiati, Yixiati, Haas, Peter, Ferraccioli, Fausto, Scheiber-Enslin, Stephanie
Format: Article in Journal/Newspaper
Language:English
Published: 2021
Subjects:
article
ScholarlyArticle
ddc:520
ddc:550
Published Version
Central Gondwana
satellite magnetic model (LCS-1)
aeromagnetic data
satelite data
East Antarctica
Grunehogna
Antarc*
Antarctica
Online Access:https://doi.org/10.1038/s41598-021-84834-1
https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2022-00214-9
https://macau.uni-kiel.de/receive/macau_mods_00002628
https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00003753/s41598-021-84834-1.pdf
Description
Summary:We present a new magnetic compilation for Central Gondwana conformed to a recent satellite magnetic model (LCS-1) with the help of an equivalent layer approach, resulting in consistent levels, corrections that have not previously been applied. Additionally, we use the satellite data to its full spectral content, which helps to include India, where high resolution aeromagnetic data are not publically available. As India is located north of the magnetic equator, we also performed a variable reduction to the pole to the satellite data by applying an equivalent source method. The conformed aeromagnetic and satellite data are superimposed on a recent deformable Gondwana plate reconstruction that links the Kaapvaal Craton in Southern Africa with the Grunehogna Craton in East Antarctica in a tight fit. Aeromagnetic anomalies unveil, however, wider orogenic belts that preserve remnants of accreted Meso- to Neoproterozoic crust in interior East Antarctica, compared to adjacent sectors of Southern Africa and India. Satellite and aeromagnetic anomaly datasets help to portray the extent and architecture of older Precambrian cratons, re-enforcing their linkages in East Antarctica, Australia, India and Africa.

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