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在火星上拍摄的古代海洋沿海沉积物
Jianhui Li1, Hai Liu1, Xu Meng1
1School of Civil Engineering and Transportation, Guangzhou University, Guangzhou 510006, China.
概括
来自朱龙探测器的证据表明,在乌托邦平原 (Utopia Planitia) 存在着一个古老的火星海洋. 雷达数据显示,地下反射器与逐渐增长的海岸线一致,在早期的火星上支着大量的水体.
科学领域:
- 行星科学 行星科学
- 地质地质地质地质地质地
- 遥感 遥感 遥感 遥感
背景情况:
- 由于有限的地下证据,火星上古代海洋的存在受到争论.
- 以前的研究已经探索了早期火星水体的各种假设.
研究的目的:
- 使用雷达数据调查乌托邦平原的地下地质结构.
- 确定证据支持或反驳存在一个大水体,可能是一个海洋,在早期的火星的北方低地.
主要方法:
- 采用了来自朱龙漫游车的透雷达仪器的数据.
- 在南方的乌托邦平原分析了地下浸泡反射器.
- 解释了地质结构和沉积物特性.
主要成果:
- 确定了1.3公里的单向浸泡反射器 (6°20°),与逐渐增长的海岸线一致.
- 观察到的反射器厚度为1035米.
- 沉积物特性 (低导电性) 和结构特征与陆地沿海沉积物一致,而不是河流,岩或岩起源.
结论:
- 发现提供了强有力的支持,一个大,古老的水体,可能是海洋,在火星的北方平原.
- 沉积物的规模表明,沉积物向一个相当大的水体供应了大量沉积物.
- 提供了对早期火星的环境演变的关键见解.
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