Mixing in the Mantle
Mixing in the Mantle
复制标题
在地幔中混合
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
L. Kellogg
中科院分区：
文献类型：
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作者：
L. Kellogg
洋中脊玄武岩（MORB）的微量元素贫化，由于地壳的提取，这是相应的富集。MORB的同位素特征表明，这些玄武岩的源区已经枯竭了一段时间（几十亿年）。大洋岛玄武岩（OIB），另一方面，表现出从亏损到未亏损到富集的同位素特征。这些不均匀性可以通过多种方式形成，例如地壳物质的俯冲，或早期地球未耗尽的物质的保存。
The mid-ocean ridge basalts (MORB) are depleted in trace elements due to the extraction of the crust, which is correspondingly enriched. The isotopic character of MORB indicates that the source region for these basalts has been depleted for some time (several billion years). The oceanic island basalts (OIB) , on the other hand, exhibit isotope characteristics ranging from depleted to undepleted to enriched. These heterogeneities can form in myriad ways; for instance by subduction of crustal material, or by preservation of undepleted material from the early Earth.