Impact cratering rate consistency test from ages of layered ejecta on Mars
© 2019 Elsevier Ltd Ages of geological units of planetary bodies are determined from impact crater counts on their surface. These ages are model-dependent, and several models largely used in the community assume a constant production function and a constant cratering rate over the last 3 Ga. We have...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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2019
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| Online Access: | https://www.sciencedirect.com/science/article/am/pii/S0032063319301904 http://hdl.handle.net/20.500.11937/76440 |
| _version_ | 1848763687716782080 |
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| author | Lagain, Anthony Bouley, S. Baratoux, D. Costard, F. Wieczorek, M. |
| author_facet | Lagain, Anthony Bouley, S. Baratoux, D. Costard, F. Wieczorek, M. |
| author_sort | Lagain, Anthony |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2019 Elsevier Ltd Ages of geological units of planetary bodies are determined from impact crater counts on their surface. These ages are model-dependent, and several models largely used in the community assume a constant production function and a constant cratering rate over the last 3 Ga. We have mapped the population of small impact craters (>200 m in diameter) formed over a population of large impact craters (>5 km in diameter) with layered ejecta on Acidalia Planitia, Mars. We have deduced the age of each large impact crater under the assumption of a constant impact rate and constant production function. The impact rate inferred from this set of ages is, however, not constant and show a significant increasing during the last ~1 Ga compared to chronology models commonly used. We interpret this inconsistency as an evidence for temporal variations in the size-frequency distribution (SFD) of impactors in the main belt, consistent with recent studies argued for a late increasing of the large impactor flux on Earth and the Moon. |
| first_indexed | 2025-11-14T11:07:26Z |
| format | Journal Article |
| id | curtin-20.500.11937-76440 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:07:26Z |
| publishDate | 2019 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-764402023-04-26T05:28:26Z Impact cratering rate consistency test from ages of layered ejecta on Mars Lagain, Anthony Bouley, S. Baratoux, D. Costard, F. Wieczorek, M. © 2019 Elsevier Ltd Ages of geological units of planetary bodies are determined from impact crater counts on their surface. These ages are model-dependent, and several models largely used in the community assume a constant production function and a constant cratering rate over the last 3 Ga. We have mapped the population of small impact craters (>200 m in diameter) formed over a population of large impact craters (>5 km in diameter) with layered ejecta on Acidalia Planitia, Mars. We have deduced the age of each large impact crater under the assumption of a constant impact rate and constant production function. The impact rate inferred from this set of ages is, however, not constant and show a significant increasing during the last ~1 Ga compared to chronology models commonly used. We interpret this inconsistency as an evidence for temporal variations in the size-frequency distribution (SFD) of impactors in the main belt, consistent with recent studies argued for a late increasing of the large impactor flux on Earth and the Moon. 2019 Journal Article http://hdl.handle.net/20.500.11937/76440 10.1016/j.pss.2019.104755 https://www.sciencedirect.com/science/article/am/pii/S0032063319301904 http://purl.org/au-research/grants/arc/FT170100024 unknown |
| spellingShingle | Lagain, Anthony Bouley, S. Baratoux, D. Costard, F. Wieczorek, M. Impact cratering rate consistency test from ages of layered ejecta on Mars |
| title | Impact cratering rate consistency test from ages of layered ejecta on Mars |
| title_full | Impact cratering rate consistency test from ages of layered ejecta on Mars |
| title_fullStr | Impact cratering rate consistency test from ages of layered ejecta on Mars |
| title_full_unstemmed | Impact cratering rate consistency test from ages of layered ejecta on Mars |
| title_short | Impact cratering rate consistency test from ages of layered ejecta on Mars |
| title_sort | impact cratering rate consistency test from ages of layered ejecta on mars |
| url | https://www.sciencedirect.com/science/article/am/pii/S0032063319301904 https://www.sciencedirect.com/science/article/am/pii/S0032063319301904 http://hdl.handle.net/20.500.11937/76440 |