| タイトル | Insights Into the Aqueous History of Mars from Acid-Sulfate Weathered Phyllosilicates |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160003509 |
| 著者（英） | Rampe, E. B.; Craig, P. I.; Ming, D. W.; Morris, R. V. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2016-03-21 |
| 言語 | eng |
| 内容記述 | Phyllosilicates on Mars are thought to have formed during Mars' earliest Noachian geologic era (approx. 4.1-3.7 Ga). Sulfate formation, on the other hand, requires more acidic conditions which are thought to have occurred later during Mars' Hesperian era (approx. 3.7-3.0 Ga). Therefore, regions on Mars where phyllosilicates and sulfates are found in close proximity to each other provide evidence for the aqueous conditions during this global transition. Both phyllosilicates and sulfates form in the presence of water and thus give clues to the aqueous history of Mars and its potential for habitability. Phyllosilicates that formed during the Noachian era would have been weathered by the prevailing acidic conditions that define the Hesperian. Therefore, the purpose of this study is to characterize the alteration products of acid-sulfate weathered phyllosilicates in laboratory experiments, focusing on the Fe/Mg-smectites commonly identified on Mars. We also compare our results to observations of phyllosilicates and sulfates on Mars in regions such as Endeavour Crater and Mawrth Vallis to understand the formation process of sulfates and constrain the aqueous history of these regions. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| レポートNO | JSC-CN-35219 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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