The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin
The 492 km-diameter Apollo impact basin post-dates, and is located at the inner edge of, the similar to 2240 km diameter South Pole-Aitken (SPA) basin, providing an opportunity to assess the SPA substructure and lateral heterogeneity. Gravity Recovery and Interior Laboratory gravity data suggest an...
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ftchacadscgigcas:oai:ir.gig.ac.cn:344008/45139 2023-05-15T18:22:13+02:00 The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin Potter, Ross W. K. Head, James W. Guo, Dijun Liu, Jianzhong Xiao, Long 2018-05-15 http://ir.gig.ac.cn/handle/344008/45139 https://doi.org/10.1016/j.icarus.2018.02.007 英语 eng ACADEMIC PRESS INC ELSEVIER SCIENCE ICARUS http://ir.gig.ac.cn/handle/344008/45139 doi:10.1016/j.icarus.2018.02.007 Astronomy & Astrophysics Cratering Impact processes Moon surface interior SCHRODINGER-BASIN LUNAR EXPLORATION ANCIENT VOLCANISM ORIENTALE BASIN MISSION CONCEPT COMPLEX CRATER ORIGIN CRUST ROCK 期刊论文 2018 ftchacadscgigcas https://doi.org/10.1016/j.icarus.2018.02.007 2020-12-22T07:21:53Z The 492 km-diameter Apollo impact basin post-dates, and is located at the inner edge of, the similar to 2240 km diameter South Pole-Aitken (SPA) basin, providing an opportunity to assess the SPA substructure and lateral heterogeneity. Gravity Recovery and Interior Laboratory gravity data suggest an average crustal thickness on the floor of SPA of similar to 20 km and within the Apollo basin of similar to 5 km, yet remote sensing data reveal no conclusive evidence for the presence of exposed mantle material. We use the iSALE shock physics code to model the formation of the Apollo basin and find that the observational data are best fit by the impact of a 40 km diameter body traveling at 15 km/s into 20-40 km thick crustal material. These results strongly suggest that the Apollo impact occurred on ejecta deposits and collapsed crustal material of the SPA basin and could help place constraints on the location, size and geometry of the SPA transient cavity. The peak ring in the interior of Apollo basin is plausibly interpreted to be composed of inwardly collapsed lower crustal material that experienced peak shock pressures in excess of 35 GPa, consistent with remote sensing observations that suggest shocked plagioclase. Proposed robotic and/or human missions to SPA and Apollo would present an excellent opportunity to test the predictions of this work and address many scientific questions about SPA basin evolution and structure. (C) 2018 Elsevier Inc. All rights reserved. Report South pole Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) Apollo Peak ENVELOPE(160.800,160.800,-77.500,-77.500) South Pole Icarus 306 139 149 |
institution |
Open Polar |
collection |
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchacadscgigcas |
language |
English |
topic |
Astronomy & Astrophysics Cratering Impact processes Moon surface interior SCHRODINGER-BASIN LUNAR EXPLORATION ANCIENT VOLCANISM ORIENTALE BASIN MISSION CONCEPT COMPLEX CRATER ORIGIN CRUST ROCK |
spellingShingle |
Astronomy & Astrophysics Cratering Impact processes Moon surface interior SCHRODINGER-BASIN LUNAR EXPLORATION ANCIENT VOLCANISM ORIENTALE BASIN MISSION CONCEPT COMPLEX CRATER ORIGIN CRUST ROCK Potter, Ross W. K. Head, James W. Guo, Dijun Liu, Jianzhong Xiao, Long The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin |
topic_facet |
Astronomy & Astrophysics Cratering Impact processes Moon surface interior SCHRODINGER-BASIN LUNAR EXPLORATION ANCIENT VOLCANISM ORIENTALE BASIN MISSION CONCEPT COMPLEX CRATER ORIGIN CRUST ROCK |
description |
The 492 km-diameter Apollo impact basin post-dates, and is located at the inner edge of, the similar to 2240 km diameter South Pole-Aitken (SPA) basin, providing an opportunity to assess the SPA substructure and lateral heterogeneity. Gravity Recovery and Interior Laboratory gravity data suggest an average crustal thickness on the floor of SPA of similar to 20 km and within the Apollo basin of similar to 5 km, yet remote sensing data reveal no conclusive evidence for the presence of exposed mantle material. We use the iSALE shock physics code to model the formation of the Apollo basin and find that the observational data are best fit by the impact of a 40 km diameter body traveling at 15 km/s into 20-40 km thick crustal material. These results strongly suggest that the Apollo impact occurred on ejecta deposits and collapsed crustal material of the SPA basin and could help place constraints on the location, size and geometry of the SPA transient cavity. The peak ring in the interior of Apollo basin is plausibly interpreted to be composed of inwardly collapsed lower crustal material that experienced peak shock pressures in excess of 35 GPa, consistent with remote sensing observations that suggest shocked plagioclase. Proposed robotic and/or human missions to SPA and Apollo would present an excellent opportunity to test the predictions of this work and address many scientific questions about SPA basin evolution and structure. (C) 2018 Elsevier Inc. All rights reserved. |
format |
Report |
author |
Potter, Ross W. K. Head, James W. Guo, Dijun Liu, Jianzhong Xiao, Long |
author_facet |
Potter, Ross W. K. Head, James W. Guo, Dijun Liu, Jianzhong Xiao, Long |
author_sort |
Potter, Ross W. K. |
title |
The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin |
title_short |
The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin |
title_full |
The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin |
title_fullStr |
The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin |
title_full_unstemmed |
The Apollo peak-ring impact basin: Insights into the structure and evolution of the South Pole-Aitken basin |
title_sort |
apollo peak-ring impact basin: insights into the structure and evolution of the south pole-aitken basin |
publisher |
ACADEMIC PRESS INC ELSEVIER SCIENCE |
publishDate |
2018 |
url |
http://ir.gig.ac.cn/handle/344008/45139 https://doi.org/10.1016/j.icarus.2018.02.007 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) ENVELOPE(160.800,160.800,-77.500,-77.500) |
geographic |
Aitken Apollo Peak South Pole |
geographic_facet |
Aitken Apollo Peak South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
ICARUS http://ir.gig.ac.cn/handle/344008/45139 doi:10.1016/j.icarus.2018.02.007 |
op_doi |
https://doi.org/10.1016/j.icarus.2018.02.007 |
container_title |
Icarus |
container_volume |
306 |
container_start_page |
139 |
op_container_end_page |
149 |
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1766201593578913792 |