Estimation of Ejecta Thickness from Impact Craters in the South Polar Region of the Moon
- Autores: Krasilnikov A.1, Krasilnikov S.1, Ivanov M.1, Head J.2
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Afiliações:
- Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
- Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, USA
- Edição: Volume 57, Nº 2 (2023)
- Páginas: 124-135
- Seção: Articles
- URL: https://journals.rcsi.science/0320-930X/article/view/134988
- DOI: https://doi.org/10.31857/S0320930X23020044
- EDN: https://elibrary.ru/NVUBEQ
- ID: 134988
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Resumo
The paper presents the results of model calculations of impact craters ejecta thickness variations in the south polar region of the Moon from the south pole to 70° S for craters of Nectarian, Imbrian, Eratos thenian, and Copernican ages. This work does not consider pre-Nectarian craters since younger deposits often hide the boundaries of their ejecta. Housen, Sharpton and Fassett models were chosen to estimate the power. The first was used for craters larger than 45 km in diameter, the second for smaller craters (from 3 to 45 km), and the third for the Mare Orientale basin. During estimation, the mixing factor of ejecta with the underlying regolith (factor μ) was considered. As a result, maps of ejecta thicknesses were produced for the Moon’s south polar region. They provide an opportunity for quantitative estimation of the various aged impact events’ contribution to the formation of polar regolith and, accordingly, to determine the dominant source (sources) of material in a particular area, not least in the proposed landing sites.
Palavras-chave
Sobre autores
A. Krasilnikov
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
Email: krasilnikov_as@geokhi.ru
Россия, Москва
S. Krasilnikov
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
Email: krasilnikov_as@geokhi.ru
Россия, Москва
M. Ivanov
Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, Moscow, Russia
Email: krasilnikov_as@geokhi.ru
Россия, Москва
J. Head
Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI, USA
Autor responsável pela correspondência
Email: krasilnikov_as@geokhi.ru
USA, Providence, RI
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