| Автор | Nimmo, Francis |
| Автор | Tanaka, Ken |
| Дата выпуска | 2005 |
| dc.description | ▪ Abstract The bulk of the ∼50-km-thick Martian crust formed at ∼4.5 Gyr B.P., perhaps from a magma ocean. This crust is probably a basaltic andesite or andesite and is enriched in incompatible and heat-producing elements. Later additions of denser basalt to the crust were volumetrically minor, but resurfaced significant portions of the Northern hemisphere. A significant fraction of the total thickness of the crust was magnetized prior to 4 Gyr B.P., with the magnetization later selectively removed by large impacts. Early large impacts also modified the hemispheric contrast in crustal thickness (the dichotomy), which was possibly caused by long-wavelength mantle convection. Subsequent Noachian modification of the crust included further impacts, significant fluvial erosion, and volcanism associated with the formation of the Tharsis rise. Remaining outstanding questions include the origin of the dichotomy and the nature of the magnetic anomalies. |
| Формат | application.pdf |
| Издатель | Annual Reviews |
| Копирайт | Annual Reviews |
| Название | EARLY CRUSTAL EVOLUTION OF MARS <sup>1</sup> |
| DOI | 10.1146/annurev.earth.33.092203.122637 |
| Print ISSN | 0084-6597 |
| Журнал | Annual Review of Earth and Planetary Sciences |
| Том | 33 |
| Первая страница | 133 |
| Последняя страница | 161 |
| Аффилиация | Nimmo, Francis; Department of Earth and Space Sciences, University of California, Los Angeles, California 90095-1567; email: nimmo@ess.ucla.edu |
