| タイトル | Large scale cratering of the lunar highlands - Some Monte Carlo model considerations |
| 著者（英） | Hill, R. E.; Gault, D. E.; Hoerz, F.; Gibbons, R. V. |
| 著者所属（英） | NASA Johnson Space Center|Lockheed Electronics Co.|NASA Ames Research Center |
| 発行日 | 1976-01-01 |
| 言語 | eng |
| 内容記述 | In an attempt to understand the scale and intensity of the moon's early, large scale meteoritic bombardment, a Monte Carlo computer model simulated the effects of all lunar craters greater than 800 m in diameter, for example, the number of times and depths specific fractions of the entire lunar surface were cratered. The model used observed crater size frequencies and crater-geometries compatible with the suggestions of Pike (1974) and Dence (1973); it simulated bombardment histories up to a factor of 10 more intense than those reflected by the present-day crater number density of the lunar highlands. For the present-day cratering record the model yields the following: approximately 25% of the entire lunar surface has not been cratered deeper than 100 m; 50% may have been cratered to 2-3 km depth; less than 5% of the surface has been cratered deeper than about 15 km. A typical highland site has suffered 1-2 impacts. Corresponding values for more intense bombardment histories are also presented, though it must remain uncertain what the absolute intensity of the moon's early meteorite bombardment was. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 77A34817 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/437815 |
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