Potential anomalies on a sphere: Applications to the thickness of the lunar crust
International audience A new technique for calculating potential anomalies on a sphere due to finite amplitude relie f has been developed. We show that by raising the topography to the nth power and expanding this field into spherical h annonics, potential anomalies due to topography on spherical de...
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ftccsdartic:oai:HAL:hal-02458509v1 2023-05-15T18:22:54+02:00 Potential anomalies on a sphere: Applications to the thickness of the lunar crust Phillips, Roger Wieczorek, Mark Washington University in Saint Louis (WUSTL) 1998 https://hal.archives-ouvertes.fr/hal-02458509 https://hal.archives-ouvertes.fr/hal-02458509/document https://hal.archives-ouvertes.fr/hal-02458509/file/Wieczorek%20and%20Phillips%201998.pdf https://doi.org/10.1029/97JE03136 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/97JE03136 hal-02458509 https://hal.archives-ouvertes.fr/hal-02458509 https://hal.archives-ouvertes.fr/hal-02458509/document https://hal.archives-ouvertes.fr/hal-02458509/file/Wieczorek%20and%20Phillips%201998.pdf doi:10.1029/97JE03136 info:eu-repo/semantics/OpenAccess ISSN: 2169-9097 EISSN: 2169-9100 Journal of Geophysical Research. Planets https://hal.archives-ouvertes.fr/hal-02458509 Journal of Geophysical Research. Planets, Wiley-Blackwell, 1998, 103 (E1), pp.1715-1724. ⟨10.1029/97JE03136⟩ [SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology info:eu-repo/semantics/article Journal articles 1998 ftccsdartic https://doi.org/10.1029/97JE03136 2021-12-12T01:24:44Z International audience A new technique for calculating potential anomalies on a sphere due to finite amplitude relie f has been developed. We show that by raising the topography to the nth power and expanding this field into spherical h annonics, potential anomalies due to topography on spherical density interfaces can be computed to arbitrary p recision. U sing a filter for downward continuing the Bouguer anomaly, we have computed a variety of crustal thickness maps for the Moon, assuining both a homogeneous as well as a dual-layered crust. The crustal thickness maps for the homogeneous model give plausible results, but this model is nor consistent with the seismic data, petrologi.c evidence, and geoid to topography ratios, all of which suggest some form of crustal stratification. Several dual-layered models were investigated, and it was found that only models with both upper and lower c rustal thickness variations could satisfy the gravity and topography data. These models predict that the entire upper crust has been excavat ed beneath the major nearside multiring b as itis. Additiona lly, significant amounts of lower crusta l material was excavated from these basins, especially beneath Crisium. T his m odel also predicts that mantle material should not have been excavated during the South-Pole A itken basin forming event, and that lower crus tal material should be exposed at the surface in this basin. Article in Journal/Newspaper South pole Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) South Pole Journal of Geophysical Research: Planets 103 E1 1715 1724 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology |
spellingShingle |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology Phillips, Roger Wieczorek, Mark Potential anomalies on a sphere: Applications to the thickness of the lunar crust |
topic_facet |
[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology |
description |
International audience A new technique for calculating potential anomalies on a sphere due to finite amplitude relie f has been developed. We show that by raising the topography to the nth power and expanding this field into spherical h annonics, potential anomalies due to topography on spherical density interfaces can be computed to arbitrary p recision. U sing a filter for downward continuing the Bouguer anomaly, we have computed a variety of crustal thickness maps for the Moon, assuining both a homogeneous as well as a dual-layered crust. The crustal thickness maps for the homogeneous model give plausible results, but this model is nor consistent with the seismic data, petrologi.c evidence, and geoid to topography ratios, all of which suggest some form of crustal stratification. Several dual-layered models were investigated, and it was found that only models with both upper and lower c rustal thickness variations could satisfy the gravity and topography data. These models predict that the entire upper crust has been excavat ed beneath the major nearside multiring b as itis. Additiona lly, significant amounts of lower crusta l material was excavated from these basins, especially beneath Crisium. T his m odel also predicts that mantle material should not have been excavated during the South-Pole A itken basin forming event, and that lower crus tal material should be exposed at the surface in this basin. |
author2 |
Washington University in Saint Louis (WUSTL) |
format |
Article in Journal/Newspaper |
author |
Phillips, Roger Wieczorek, Mark |
author_facet |
Phillips, Roger Wieczorek, Mark |
author_sort |
Phillips, Roger |
title |
Potential anomalies on a sphere: Applications to the thickness of the lunar crust |
title_short |
Potential anomalies on a sphere: Applications to the thickness of the lunar crust |
title_full |
Potential anomalies on a sphere: Applications to the thickness of the lunar crust |
title_fullStr |
Potential anomalies on a sphere: Applications to the thickness of the lunar crust |
title_full_unstemmed |
Potential anomalies on a sphere: Applications to the thickness of the lunar crust |
title_sort |
potential anomalies on a sphere: applications to the thickness of the lunar crust |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.archives-ouvertes.fr/hal-02458509 https://hal.archives-ouvertes.fr/hal-02458509/document https://hal.archives-ouvertes.fr/hal-02458509/file/Wieczorek%20and%20Phillips%201998.pdf https://doi.org/10.1029/97JE03136 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
ISSN: 2169-9097 EISSN: 2169-9100 Journal of Geophysical Research. Planets https://hal.archives-ouvertes.fr/hal-02458509 Journal of Geophysical Research. Planets, Wiley-Blackwell, 1998, 103 (E1), pp.1715-1724. ⟨10.1029/97JE03136⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/97JE03136 hal-02458509 https://hal.archives-ouvertes.fr/hal-02458509 https://hal.archives-ouvertes.fr/hal-02458509/document https://hal.archives-ouvertes.fr/hal-02458509/file/Wieczorek%20and%20Phillips%201998.pdf doi:10.1029/97JE03136 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/97JE03136 |
container_title |
Journal of Geophysical Research: Planets |
container_volume |
103 |
container_issue |
E1 |
container_start_page |
1715 |
op_container_end_page |
1724 |
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