The nature of pristine noble gases in mantle plumes
The nature of pristine noble gases in mantle plumes
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DOI：
10.1126/science.288.5468.1036
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发表时间：
2000-05
期刊：
影响因子：
56.9
通讯作者：
Mario Trieloff;J. Kunz;D. Clague;Darrell Harrison;C. Allègre
中科院分区：
文献类型：
--
作者：
Mario Trieloff;J. Kunz;D. Clague;Darrell Harrison;C. Allègre
高精度稀有气体数据表明，夏威夷和冰岛地幔烟柱来源含有独特的原始霓虹，它由中等成核的Ne-21组成，以及与太阳霓虹的流星产出难以区分的原始成分。这表明，地球上的太阳型稀有气体是在早期太阳的太阳风照射过的小行星吸积过程中获得的。然而，来自地幔的非放射性成因的Ar、氪和氙气同位素显示了非太阳成分，并表明了不是由于最近的俯冲而产生的大气样指纹。
High-precision noble gas data show that the Hawaiian and Icelandic mantle plume sources contain uniquely primitive neon that is composed of moderately nucleogenic neon-21 and a primordial component indistinguishable from the meteoritic occurrence of solar neon. This suggests that Earth's solar-type rare gas inventory was acquired during accretion from small planetesimals previously irradiated by solar wind from the early sun. However, nonradiogenic argon, krypton, and xenon isotopes derived from the mantle display nonsolar compositions and indicate an atmosphere-like fingerprint that is not due to recent subduction.