The self‐secondary crater population of the Hokusai crater on Mercury
Abstract Whether or not self‐secondaries dominate small crater populations on continuous ejecta deposits and floors of fresh impact craters has long been a controversy. This issue potentially affects the age determination technique using crater statistics. Here the self‐secondary crater population o...
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| Format: | Article |
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Wiley
2016-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069868 |
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| author | Zhiyong Xiao Nils C. Prieur Stephanie C. Werner |
| author_facet | Zhiyong Xiao Nils C. Prieur Stephanie C. Werner |
| author_sort | Zhiyong Xiao |
| collection | DOAJ |
| description | Abstract Whether or not self‐secondaries dominate small crater populations on continuous ejecta deposits and floors of fresh impact craters has long been a controversy. This issue potentially affects the age determination technique using crater statistics. Here the self‐secondary crater population on the continuous ejecta deposits of the Hokusai crater on Mercury is unambiguously recognized. Superposition relationships show that this population was emplaced after both the ballistic sedimentation of excavation flows and the subsequent veneering of impact melt, but it predated the settlement and solidification of melt pools on the crater floor. Fragments that formed self‐secondaries were launched via impact spallation with large angles. Complex craters on the Moon, Mercury, and Mars probably all have formed self‐secondaries populations. Dating young craters using crater statistics on their continuous ejecta deposits can be misleading. Impact melt pools are less affected by self‐secondaries. Overprint by subsequent crater populations with time reduces the predominance of self‐secondaries. |
| format | Article |
| id | doaj-art-6f73fd8f5bbe465d9aec4c7f14abc6f1 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-6f73fd8f5bbe465d9aec4c7f14abc6f12025-08-20T03:10:28ZengWileyGeophysical Research Letters0094-82761944-80072016-07-0143147424743210.1002/2016GL069868The self‐secondary crater population of the Hokusai crater on MercuryZhiyong Xiao0Nils C. Prieur1Stephanie C. Werner2Planetary Science Institute, School of Earth Sciences China University of Geosciences Wuhan ChinaCentre for Earth Evolution and Dynamics University of Oslo Oslo NorwayCentre for Earth Evolution and Dynamics University of Oslo Oslo NorwayAbstract Whether or not self‐secondaries dominate small crater populations on continuous ejecta deposits and floors of fresh impact craters has long been a controversy. This issue potentially affects the age determination technique using crater statistics. Here the self‐secondary crater population on the continuous ejecta deposits of the Hokusai crater on Mercury is unambiguously recognized. Superposition relationships show that this population was emplaced after both the ballistic sedimentation of excavation flows and the subsequent veneering of impact melt, but it predated the settlement and solidification of melt pools on the crater floor. Fragments that formed self‐secondaries were launched via impact spallation with large angles. Complex craters on the Moon, Mercury, and Mars probably all have formed self‐secondaries populations. Dating young craters using crater statistics on their continuous ejecta deposits can be misleading. Impact melt pools are less affected by self‐secondaries. Overprint by subsequent crater populations with time reduces the predominance of self‐secondaries.https://doi.org/10.1002/2016GL069868impact crateringMercurysecondary craters |
| spellingShingle | Zhiyong Xiao Nils C. Prieur Stephanie C. Werner The self‐secondary crater population of the Hokusai crater on Mercury Geophysical Research Letters impact cratering Mercury secondary craters |
| title | The self‐secondary crater population of the Hokusai crater on Mercury |
| title_full | The self‐secondary crater population of the Hokusai crater on Mercury |
| title_fullStr | The self‐secondary crater population of the Hokusai crater on Mercury |
| title_full_unstemmed | The self‐secondary crater population of the Hokusai crater on Mercury |
| title_short | The self‐secondary crater population of the Hokusai crater on Mercury |
| title_sort | self secondary crater population of the hokusai crater on mercury |
| topic | impact cratering Mercury secondary craters |
| url | https://doi.org/10.1002/2016GL069868 |
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