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在火星早期历史期间,地表水和粘土矿物质的形成
Bethany L Ehlmann1, John F Mustard, Scott L Murchie
1Institut d'Astrophysique Spatiale, Université de Paris-Sud XI, 91405 Orsay Cedex, France. ehlmann@caltech.edu
Nature
|November 5, 2011
概括
早期的火星可能是寒冷和干旱的,地下水提供了最长的可居住环境. 粘土矿物质的形成表明显著的热水活动,而不是广泛的地表水,挑战了关于地球古代气候的先前假设.
科学领域:
- 行星科学 行星科学
- 天体生物学 天体生物学
- 地质地质地质地质地质地
背景情况:
- 粘土矿物在火星的诺亚地形中广泛存在,这表明过去的水岩相互作用.
- 了解粘土形成是重建早期火星环境条件的关键.
研究的目的:
- 为了分析火星粘土矿物质的形成.
- 为了确定早期火星的环境条件.
主要方法:
- 分析粘土矿物质的分布和形成.
- 诺亚人的岩石记录的解释.
主要成果:
- 现有的数据表明,粘土形成主要是通过水热地下水循环发生的.
- 诺亚人的岩石记录显示,地下水的证据比表面水更多.
- 几十亿年来,火星表面的条件可能是寒冷和干旱,表面水过渡.
结论:
- 火星地下很可能存在长期的水性环境和潜在的宜居环境.
- 早期火星的表面条件可能并不像以前假设的那样持续变暖和湿.
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