PB-SR ISOTOPE VARIATION IN INDIAN-OCEAN BASALTS AND MIXING PHENOMENA
PB-SR ISOTOPE VARIATION IN INDIAN-OCEAN BASALTS AND MIXING PHENOMENA
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DOI：
10.1038/303142a0
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发表时间：
1983-01-01
期刊：
影响因子：
64.8
通讯作者：
ALLEGRE, CJ
中科院分区：
文献类型：
--
作者：
DUPRE, B;ALLEGRE, CJ
来自印度洋的铅和锶同位素组成(活动海脊、旧洋底和无地震海脊样品)证实了该地区地幔记录的特征。研究结果强调了下地幔(洋岛玄武岩源区)与上地幔(海脊玄武岩源区)混合作用的重要性。印度洋岛屿的同位素特征似乎与沉积物重新注入地幔的假说相一致。
Pb and Sr isotopic compositions from the Indian Ocean (active ridges, old ocean floor and aseismic ridge samples) confirm the characteristic nature of the mantle record in this region. The results emphasize the importance of mixing processes between the lower mantle (oceanic-island basalt source), and the upper mantle (ridge-basalt source). The isotopic characteristics of the Indian Ocean islands seem to be in agreement with the hypothesis of the reinjection of sediments into the mantle.