Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study
In the present study, a Bayesian gravity inversion algorithm is applied to infer a complete 3D density model of the crust in the region of the Wilkes Land. One of the main objective of this work is to provide information on the thickening/thinning of the crust beneath the basin or the amount and cha...
Published in: | Geophysical Journal International |
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Oxford University Press
2022
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Online Access: | http://nora.nerc.ac.uk/id/eprint/531898/ https://nora.nerc.ac.uk/id/eprint/531898/1/ggac036.pdf https://academic.oup.com/gji/advance-article/doi/10.1093/gji/ggac036/6518289 |
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ftnerc:oai:nora.nerc.ac.uk:531898 2023-05-15T13:41:46+02:00 Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study Capponi, M. Sampietro, D. Ebbing, J. Ferraccioli, F. 2022-06 text http://nora.nerc.ac.uk/id/eprint/531898/ https://nora.nerc.ac.uk/id/eprint/531898/1/ggac036.pdf https://academic.oup.com/gji/advance-article/doi/10.1093/gji/ggac036/6518289 en eng Oxford University Press https://nora.nerc.ac.uk/id/eprint/531898/1/ggac036.pdf Capponi, M.; Sampietro, D.; Ebbing, J.; Ferraccioli, F. orcid:0000-0002-9347-4736 . 2022 Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study. Geophysical Journal International, 229 (3), ggac036. 2147-2161. https://doi.org/10.1093/gji/ggac036 <https://doi.org/10.1093/gji/ggac036> Publication - Article PeerReviewed 2022 ftnerc https://doi.org/10.1093/gji/ggac036 2023-02-04T19:52:59Z In the present study, a Bayesian gravity inversion algorithm is applied to infer a complete 3D density model of the crust in the region of the Wilkes Land. One of the main objective of this work is to provide information on the thickening/thinning of the crust beneath the basin or the amount and characteristics of sediment deposits in the area. After collecting all the latest available geophysical data and models of the study region, neglecting gravity derived information, a first 3D model was defined in terms of principal geological horizons and density distribution together with an estimate of its accuracy. Then, two gravity observations, namely gravity disturbances and second radial derivative of the anomalous potential, were jointly inverted in order to adjust the a-priori 3D model and obtain the so called a-posterior improved model, now coherent with gravity. The present work summarizes the principal results obtained within the inversion performed in the Wilkes Land region together with a sensitivity analysis to assess the reliability of the inverted 3D model. The results show a crustal thickness below the Wilkes Land higher than 25 km, characterized by higher densities, sedimentary basins that reach in some zones thicknesses of about 7 km and geometries below the TAM that suggest a large root of the mountains and lighter mantle densities. Article in Journal/Newspaper Antarc* Antarctica Wilkes Land Natural Environment Research Council: NERC Open Research Archive Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Geophysical Journal International 229 3 2147 2161 |
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Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
In the present study, a Bayesian gravity inversion algorithm is applied to infer a complete 3D density model of the crust in the region of the Wilkes Land. One of the main objective of this work is to provide information on the thickening/thinning of the crust beneath the basin or the amount and characteristics of sediment deposits in the area. After collecting all the latest available geophysical data and models of the study region, neglecting gravity derived information, a first 3D model was defined in terms of principal geological horizons and density distribution together with an estimate of its accuracy. Then, two gravity observations, namely gravity disturbances and second radial derivative of the anomalous potential, were jointly inverted in order to adjust the a-priori 3D model and obtain the so called a-posterior improved model, now coherent with gravity. The present work summarizes the principal results obtained within the inversion performed in the Wilkes Land region together with a sensitivity analysis to assess the reliability of the inverted 3D model. The results show a crustal thickness below the Wilkes Land higher than 25 km, characterized by higher densities, sedimentary basins that reach in some zones thicknesses of about 7 km and geometries below the TAM that suggest a large root of the mountains and lighter mantle densities. |
format |
Article in Journal/Newspaper |
author |
Capponi, M. Sampietro, D. Ebbing, J. Ferraccioli, F. |
spellingShingle |
Capponi, M. Sampietro, D. Ebbing, J. Ferraccioli, F. Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study |
author_facet |
Capponi, M. Sampietro, D. Ebbing, J. Ferraccioli, F. |
author_sort |
Capponi, M. |
title |
Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study |
title_short |
Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study |
title_full |
Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study |
title_fullStr |
Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study |
title_full_unstemmed |
Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study |
title_sort |
antarctica 3d crustal structure investigation by means of the bayesian gravity inversion: the wilkes land case study |
publisher |
Oxford University Press |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/531898/ https://nora.nerc.ac.uk/id/eprint/531898/1/ggac036.pdf https://academic.oup.com/gji/advance-article/doi/10.1093/gji/ggac036/6518289 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Wilkes Land |
geographic_facet |
Wilkes Land |
genre |
Antarc* Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctica Wilkes Land |
op_relation |
https://nora.nerc.ac.uk/id/eprint/531898/1/ggac036.pdf Capponi, M.; Sampietro, D.; Ebbing, J.; Ferraccioli, F. orcid:0000-0002-9347-4736 . 2022 Antarctica 3D crustal structure investigation by means of the Bayesian gravity inversion: The Wilkes Land case study. Geophysical Journal International, 229 (3), ggac036. 2147-2161. https://doi.org/10.1093/gji/ggac036 <https://doi.org/10.1093/gji/ggac036> |
op_doi |
https://doi.org/10.1093/gji/ggac036 |
container_title |
Geophysical Journal International |
container_volume |
229 |
container_issue |
3 |
container_start_page |
2147 |
op_container_end_page |
2161 |
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1766157749018689536 |