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Conducting Miller-Urey Experiments
Published on: January 21, 2014
在原始石母体上早期的水性活动
M Endress1, E Zinner, A Bischoff
1Institute of Planetology, University of Münster, Germany.
Nature
|February 22, 1996
概括
石的水性变化发生在太阳系早期,在最古老的太阳星云凝结物形成后不到2000万年. 这一发现完善了我们对早期太阳系过程和石演变的理解.
科学领域:
- 宇宙化学 宇宙化学
- 行星科学 行星科学
- 地质时间学 (Geochronology)
背景情况:
- 早期的太阳系经历了星际材料的显著化学和物理处理.
- 碳化CI地质提供了对原始太阳系天体的洞察力,但需要详细研究它们的变化过程.
- 石中积累后的变化,特别是碳酸盐的形成,尚未完全理解.
研究的目的:
- 为了研究CI氏体中水性变化的时间.
- 为了限制无水材料和流体在石母体上的反应的时间表.
- 为了确定水态变化的作用在太阳系早期的化学进化.
主要方法:
- 测量过多的53Cr (短暂的53Mn衰变的产物) 在CI的碳酸盐碎片中,来自Orgueil和Ivuna.
- 使用53Mn-53Cr系统进行放射测年.
主要成果:
- 在碳酸盐碎片中检测到显著多余的53Cr.
- 小原行星天体上的水性变化始于最古老的太阳星云凝聚物形成后不到2000万年.
- 这个时间表比以前推断的极限要短得多.
结论:
- 水性变化是太阳系历史上的一个非常早期的过程.
- 水性变化的早期出现显著影响了原行星天体的化学进化.
- 这些发现改进了太阳系早期事件的时间表.
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