A new model of lunar crust: asymmetry in crustal composition and evolution
Abstract Earlier models of lunar crustal formation as a simple flotation of ferroan anorthosites (FAN) do not account for the diverse crustal composition revealed by feldspathic lunar meteorites and granulites in the Apollo samples. Based on the integrated results of recent studies of lunar meteorit...
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Springer Science and Business Media LLC
2008
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crspringernat:10.1186/bf03352808 2023-05-15T18:22:06+02:00 A new model of lunar crust: asymmetry in crustal composition and evolution Arai, Tomoko Takeda, Hiroshi Yamaguchi, Akira Ohtake, Makiko 2008 http://dx.doi.org/10.1186/bf03352808 https://link.springer.com/content/pdf/10.1186/BF03352808.pdf https://link.springer.com/article/10.1186/BF03352808/fulltext.html http://link.springer.com/content/pdf/10.1186/BF03352808 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/ CC-BY Earth, Planets and Space volume 60, issue 4, page 433-444 ISSN 1880-5981 Space and Planetary Science Geology journal-article 2008 crspringernat https://doi.org/10.1186/bf03352808 2022-01-14T15:42:54Z Abstract Earlier models of lunar crustal formation as a simple flotation of ferroan anorthosites (FAN) do not account for the diverse crustal composition revealed by feldspathic lunar meteorites and granulites in the Apollo samples. Based on the integrated results of recent studies of lunar meteorites and global chemical and mineralogical maps, we propose a novel asymmetric crust model with a ferroan, noritic, nearside crust and a magnesian, troctolitic farside crust. Asymmetric crystallization of a primordial magma ocean can be one possibility to produce a crust with an asymmetric composition. A post-magma-ocean origin for a portion of the lunar crust is also possible and would account for the positive eNd value for FAN and phase equilibria. The formation of giant basins, such as the South Pole-Aitken (SPA) basin may have significant effects on resurfacing of the early lunar crust. Thus, the observed surface composition of the feldspathic highland terrane (FHT) represents the combined results of magma ocean crystallization, post-magma-ocean magmatism and resurfacing by basin formation. The Mg/(Mg+Fe) ratios, rock types, and mineral compositions of the FHT and the South Pole-Aitken basin Terrane (SPAT) obtained from the KAGUYA mission, coupled with further mineralogical and isotopic studies of lunar meteorites, will facilitate an assessment of the feasibility of the proposed crust model and improve understanding of lunar crustal genesis and evolution. Article in Journal/Newspaper South pole Springer Nature (via Crossref) Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) South Pole Earth, Planets and Space 60 4 433 444 |
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Open Polar |
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Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Space and Planetary Science Geology |
spellingShingle |
Space and Planetary Science Geology Arai, Tomoko Takeda, Hiroshi Yamaguchi, Akira Ohtake, Makiko A new model of lunar crust: asymmetry in crustal composition and evolution |
topic_facet |
Space and Planetary Science Geology |
description |
Abstract Earlier models of lunar crustal formation as a simple flotation of ferroan anorthosites (FAN) do not account for the diverse crustal composition revealed by feldspathic lunar meteorites and granulites in the Apollo samples. Based on the integrated results of recent studies of lunar meteorites and global chemical and mineralogical maps, we propose a novel asymmetric crust model with a ferroan, noritic, nearside crust and a magnesian, troctolitic farside crust. Asymmetric crystallization of a primordial magma ocean can be one possibility to produce a crust with an asymmetric composition. A post-magma-ocean origin for a portion of the lunar crust is also possible and would account for the positive eNd value for FAN and phase equilibria. The formation of giant basins, such as the South Pole-Aitken (SPA) basin may have significant effects on resurfacing of the early lunar crust. Thus, the observed surface composition of the feldspathic highland terrane (FHT) represents the combined results of magma ocean crystallization, post-magma-ocean magmatism and resurfacing by basin formation. The Mg/(Mg+Fe) ratios, rock types, and mineral compositions of the FHT and the South Pole-Aitken basin Terrane (SPAT) obtained from the KAGUYA mission, coupled with further mineralogical and isotopic studies of lunar meteorites, will facilitate an assessment of the feasibility of the proposed crust model and improve understanding of lunar crustal genesis and evolution. |
format |
Article in Journal/Newspaper |
author |
Arai, Tomoko Takeda, Hiroshi Yamaguchi, Akira Ohtake, Makiko |
author_facet |
Arai, Tomoko Takeda, Hiroshi Yamaguchi, Akira Ohtake, Makiko |
author_sort |
Arai, Tomoko |
title |
A new model of lunar crust: asymmetry in crustal composition and evolution |
title_short |
A new model of lunar crust: asymmetry in crustal composition and evolution |
title_full |
A new model of lunar crust: asymmetry in crustal composition and evolution |
title_fullStr |
A new model of lunar crust: asymmetry in crustal composition and evolution |
title_full_unstemmed |
A new model of lunar crust: asymmetry in crustal composition and evolution |
title_sort |
new model of lunar crust: asymmetry in crustal composition and evolution |
publisher |
Springer Science and Business Media LLC |
publishDate |
2008 |
url |
http://dx.doi.org/10.1186/bf03352808 https://link.springer.com/content/pdf/10.1186/BF03352808.pdf https://link.springer.com/article/10.1186/BF03352808/fulltext.html http://link.springer.com/content/pdf/10.1186/BF03352808 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) |
geographic |
Aitken South Pole |
geographic_facet |
Aitken South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Earth, Planets and Space volume 60, issue 4, page 433-444 ISSN 1880-5981 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/bf03352808 |
container_title |
Earth, Planets and Space |
container_volume |
60 |
container_issue |
4 |
container_start_page |
433 |
op_container_end_page |
444 |
_version_ |
1766201458585239552 |