相关实验视频
Updated: May 9, 2026
11:34
Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
解决火星石年龄的难题,使用微型badeleyite和发射产生的
D E Moser1, K R Chamberlain, K T Tait
1Department of Earth Sciences, University of Western Ontario, 1151 Richmond Street, London, Ontario N6A 5B7, Canada. desmond.moser@uwo.ca
Nature
|July 27, 2013
概括
这项研究使用石分析,将火星火山活动定于1.87亿年前. 它还揭示了火星有一个古老的地幔和一个不到2200万年前的最近的喷射事件.
科学领域:
- 行星科学 行星科学
- 地质化学 地质化学
- 宇宙化学 宇宙化学
背景情况:
- 行星的进化和动态记录在石地质化学中.
- 由于冲击变形和同位素复杂性,火星地的形成和喷射事件的日期具有挑战性.
研究的目的:
- 解决火星石形成和喷射事件中的年龄差异.
- 建立一个可靠的地球时间学方法,用于火星表面的过程.
主要方法:
- 在微矿物质的现场电子束纳米结构分析.
- 对baddeleyite和宿主岩性矿物质的U-Pb (-) 同位素测量.
- 对火星石的分析 西北非洲 5298.8.
主要成果:
- 在NWA 5298中的Baddeleyite颗粒早于发射事件,表明基岩结晶在187 ± 3300万年前.
- 岩源区域的分化发生在40多亿年前,是火星独有的.
- 火星的喷射发生在不到22±200万年前,导致局部冲击融化.
结论:
- 证实了年轻的火山火星下面的古老,非对流地幔.
- 提供了火星喷射物行星间旅行时间的上限.
- 验证了太阳系内部天体的新地质时间学方法.
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