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Updated: Jan 10, 2026
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Disorders of Erythrocytes
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在地底层底石中的in situ Os同位素弥合了MORB和它们的源地幔之间的同位素差距
Olivier Alard1, Ambre Luguet, Norman J Pearson
1GEMOC ARC National Key Centre, School of Earth and Planetary Sciences, Macquarie University, NSW 2109, Australia. o.alard@open.ac.uk
Nature
|August 19, 2005
概括
阿比萨尔石和中海基岩 (MORBs) 显示了同位素平衡,挑战了先前的假设. 海水 海水 海水 海水
科学领域:
- 地质化学 地质化学
- 同位素地质学的同位素.
- 地幔石化学地幔石化学
背景情况:
- 阿比萨尔石被认为是中海基岩 (MORBs) 的地幔残留物.
- 的同位素组成在深的岩石和MORBs之间历史上表明缺乏平衡.
- 这种感知不平衡往往归因于海水污染,导致数据过.
研究的目的:
- 为了研究深地矿石的初级同位素组成.
- 重新评估深地和MORBs之间的共同遗传关系.
- 为了确定海水对奥斯系统学的影响程度,在深的岩石中.
主要方法:
- 详细研究岩硫化物,奥斯的主要载体,在深的岩中.
- 在这些硫化物中分析同位素成分 (187Os/188Os比率).
- 对同位素数据与已知的MORB成分进行比较.
主要成果:
- 岩石硫化物中的同位素比率是原地幔起源的.
- 观察到放射性187Os/188Os值,表明与MORB的潜在平衡.
- 发现海水污染对系统学的影响被高估了.
结论:
- 在MORBs和深地矿石之间没有显著的同位素差距.
- 阿比索和MORB很可能有共同的遗传关系.
- 重新评估数据过标准是必要的,以了解地幔储库.
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