Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model
We estimate the crust-mantle (Moho) density contrast beneath Antarctica based on solving the inverse problem of isostasy and using the constraining information from the seismic global crustal model (CRUST2.0). The solution is found through applying the least-squares adjustment by elements method. Th...
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UNIVERSIDAD NACIONAL DE COLOMBIA
2013
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ftuncolombiair:oai:repositorio.unal.edu.co:unal/44068 2023-05-15T13:47:54+02:00 Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model Tenzer, Robert Bagherbandi, Mohammad 2013 application/pdf https://repositorio.unal.edu.co/handle/unal/44068 http://bdigital.unal.edu.co/34166/ unknown UNIVERSIDAD NACIONAL DE COLOMBIA http://revistas.unal.edu.co/index.php/esrj/article/view/34277 Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal Earth Sciences Research Journal Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) 2339-3459 1794-6190 Tenzer, Robert and Bagherbandi, Mohammad (2013) Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model. Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) 2339-3459 1794-6190 . https://repositorio.unal.edu.co/handle/unal/44068 http://bdigital.unal.edu.co/34166/ info:eu-repo/semantics/openAccess Artículo de revista info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftuncolombiair 2021-04-19T09:16:27Z We estimate the crust-mantle (Moho) density contrast beneath Antarctica based on solving the inverse problem of isostasy and using the constraining information from the seismic global crustal model (CRUST2.0). The solution is found through applying the least-squares adjustment by elements method. The global geopotential model (GOCO02S), the global topographic/bathymetric model (DTM2006.0), the ice-thickness data for Antarctica (assembled by the BEDMAP project), and the global crustal model (CRUST2.0) are used to compute the isostatic gravity anomalies. Since the CRUST2.0 data of crustal structures under Antarctica are not accurate (due to the lack of seismic data), the (reference) crust-mantle density contrast is determined with respect to the homogenous crustal model of reference constant density 2670 kg/m3. The estimated reference crust-mantle density contrast is between 160 and 682 kg/m3. The density contrast spatial distribution corresponds with major features of the Antarctic continental and surrounding oceanic tectonic plate configuration. The maxima exceeding 500 kg/m3 are found throughout the central part of East Antarctica with the extension under the Transantarctic mountain range. The crust-mantle density contrast beneath West Antarctica decreases to 400-500 kg/m3 except for the local maxima up to ~550 kg/m3 in the central Antarctic Peninsula. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica West Antarctica Repositorio Institucional Universidad Nacional de Colombia Antarctic Antarctic Peninsula East Antarctica The Antarctic West Antarctica |
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Repositorio Institucional Universidad Nacional de Colombia |
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ftuncolombiair |
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unknown |
description |
We estimate the crust-mantle (Moho) density contrast beneath Antarctica based on solving the inverse problem of isostasy and using the constraining information from the seismic global crustal model (CRUST2.0). The solution is found through applying the least-squares adjustment by elements method. The global geopotential model (GOCO02S), the global topographic/bathymetric model (DTM2006.0), the ice-thickness data for Antarctica (assembled by the BEDMAP project), and the global crustal model (CRUST2.0) are used to compute the isostatic gravity anomalies. Since the CRUST2.0 data of crustal structures under Antarctica are not accurate (due to the lack of seismic data), the (reference) crust-mantle density contrast is determined with respect to the homogenous crustal model of reference constant density 2670 kg/m3. The estimated reference crust-mantle density contrast is between 160 and 682 kg/m3. The density contrast spatial distribution corresponds with major features of the Antarctic continental and surrounding oceanic tectonic plate configuration. The maxima exceeding 500 kg/m3 are found throughout the central part of East Antarctica with the extension under the Transantarctic mountain range. The crust-mantle density contrast beneath West Antarctica decreases to 400-500 kg/m3 except for the local maxima up to ~550 kg/m3 in the central Antarctic Peninsula. |
format |
Article in Journal/Newspaper |
author |
Tenzer, Robert Bagherbandi, Mohammad |
spellingShingle |
Tenzer, Robert Bagherbandi, Mohammad Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
author_facet |
Tenzer, Robert Bagherbandi, Mohammad |
author_sort |
Tenzer, Robert |
title |
Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
title_short |
Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
title_full |
Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
title_fullStr |
Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
title_full_unstemmed |
Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
title_sort |
reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model |
publisher |
UNIVERSIDAD NACIONAL DE COLOMBIA |
publishDate |
2013 |
url |
https://repositorio.unal.edu.co/handle/unal/44068 http://bdigital.unal.edu.co/34166/ |
geographic |
Antarctic Antarctic Peninsula East Antarctica The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica West Antarctica |
op_relation |
http://revistas.unal.edu.co/index.php/esrj/article/view/34277 Universidad Nacional de Colombia Revistas electrónicas UN Earth Sciences Research Journal Earth Sciences Research Journal Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) 2339-3459 1794-6190 Tenzer, Robert and Bagherbandi, Mohammad (2013) Reference crust-mantle density contrast beneath antarctica based on the vening meinesz-moritz isostatic inverse problem and crust2.0 seismic model. Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) Earth Sciences Research Journal; Vol. 17, núm. 1 (2013) 2339-3459 1794-6190 . https://repositorio.unal.edu.co/handle/unal/44068 http://bdigital.unal.edu.co/34166/ |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766247987116244992 |