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| DOI | 10.1038/s41561-022-00969-4 |
| Bombardment history of the Moon constrained by crustal porosity | |
| Huang Y.H.; Soderblom J.M.; Minton D.A.; Hirabayashi M.; Melosh H.J. | |
| 发表日期 | 2022 |
| ISSN | 1752-0894 |
| 起始页码 | 531 |
| 结束页码 | 535 |
| 卷号 | 15期号:7 |
| 英文摘要 | The formation and evolution of the terrestrial planets were shaped by a bombardment of large impactors in a cluttered early Solar System. However, various surface processes degrade impact craters, and the early impact history of the Moon and the ages of its ancient impact basins remain uncertain. Here we show that the porosity of the lunar crust, generated by the cumulative crustal processing of impacts, can be used to determine the Moon’s bombardment history. We use a numerical model constrained by gravity data to simulate the generation of porosity by basin-forming impacts and the subsequent removal by smaller impacts and overburden pressure. We find that, instead of steadily increasing over the history of the Moon, lunar crustal porosity was largely generated early in lunar evolution when most basins formed and, on average, has decreased after that time. Using the Moon as a proxy for the terrestrial planets, we find that the terrestrial planets experienced periods of high crustal porosity early in their evolution. Our modelled porosities also provide an independent constraint on the chronological sequence of basin-forming impacts. Our results suggest that the inner solar system was subject to double the number of smaller impacts producing craters exceeding 20 km in diameter than has been previously estimated from traditional crater-counting analyses, whereas the bombardment record for the lunar basins (>200 km in diameter) is complete. This implies a limited late delivery of volatiles and siderophile elements to the terrestrial planets by impactors. © 2022, The Author(s), under exclusive licence to Springer Nature Limited. |
| 语种 | 英语 |
| scopus关键词 | Moon; numerical model; porosity; solar system |
| 来源期刊 | Nature Geoscience
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/262166 |
| 作者单位 | Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States |
| 推荐引用方式 GB/T 7714 | Huang Y.H.； Soderblom J.M.； Minton D.A.； Hirabayashi M.； Melosh H.J.. Bombardment history of the Moon constrained by crustal porosity[J],2022,15(7). |
| APA | Huang Y.H.； Soderblom J.M.； Minton D.A.； Hirabayashi M.； Melosh H.J..(2022).Bombardment history of the Moon constrained by crustal porosity.Nature Geoscience,15(7). |
| MLA | Huang Y.H.； Soderblom J.M.； Minton D.A.； Hirabayashi M.； Melosh H.J.."Bombardment history of the Moon constrained by crustal porosity".Nature Geoscience 15.7(2022). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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