| タイトル | Chemical evolution of the early Martian hydrosphere |
| 本文（外部サイト） | http://hdl.handle.net/2060/19910013688 |
| 著者（英） | Schaefer, M. W. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1990-01-01 |
| 言語 | eng |
| 内容記述 | The chemical evolution of the early Martian hydrosphere is discussed. The early Martian ocean can be modeled as a body of relatively pure water in equilibrium with a dense carbon dioxide atmosphere. The chemical weathering of lavas, pyroclastic deposits, and impact melt sheets would have the effect of neutralizing the acidity of the juvenile water. As calcium and other cations are added to the water by chemical weathering, they are quickly removed by the precipitation of calcium carbonate and other minerals, forming a deposit of limestone beneath the surface of the ocean. As the atmospheric carbon dioxide pressure and the temperature decrease, the Martian ocean would be completely frozen. Given the scenario for the chemical evolution of the northern lowland plains of Mars, it should be possible to draw a few conclusions about the expected mineralogy and geomorphology of this regions. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 91N23001 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/132714 |
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