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Incompatible element
About: Incompatible element is a research topic. Over the lifetime, 2420 publications have been published within this topic receiving 154052 citations.
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TL;DR: It is shown that 18O/16O ratios of MORBs are correlated with aspects of their incompatible-element chemistry, consistent with control of the oxygen-isotope and incompatible- element geochemistry of MORB by a component of recycled crust that is variably distributed throughout their upper mantle sources.
Abstract: Mid-ocean-ridge basalts (MORBs) are the most abundant terrestrial magmas and are believed to form by partial melting of a globally extensive reservoir of ultramafic rocks in the upper mantle. MORBs vary in their abundances of incompatible elements (that is, those that partition into silicate liquids during partial melting) and in the isotopic ratios of several radiogenic isotope systems. These variations define a spectrum between 'depleted' and 'enriched' compositions, characterized by respectively low and high abundances of incompatible elements. Compositional variations in the sources of MORBs could reflect recycling of subducted crustal materials into the source reservoir, or any of a number of processes of intramantle differentiation. Variations in ^(18)O/^(16)O (principally sensitive to the interaction of rocks with the Earth's hydrosphere) offer a test of these alternatives. Here we show that ^(18)O/^(16)O ratios of MORBs are correlated with aspects of their incompatible-element chemistry. These correlations are consistent with control of the oxygen-isotope and incompatible-element geochemistry of MORBs by a component of recycled crust that is variably distributed throughout their upper mantle sources.
224 citations
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TL;DR: Niu and Batiza as discussed by the authors showed that seamounts on the flanks of the East Pacific Rise (EPR) between 5° and 15°N vary from extremely depleted tholeiites to highly enriched alkali basalts.
224 citations
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TL;DR: In this article, the mass of the mantle affected by continent formation may constitute as much as 80% or more of the entire Earth's mantle, and the abundances of K, U and Th in this early-formed depleted mantle are 60-70% of those calculated for a chondritic mantle.
223 citations
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TL;DR: Isotopic patterns of Nd, Sr, and Pb are remarkably coherent along the super-fast spreading portion of the East Pacific Rise from 13°S to 23°S as discussed by the authors.
223 citations
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TL;DR: Arndt et al. as discussed by the authors showed that the low water contents of most flood basalts argue against proposals that hydrous lithosphere was the source, and they suggested that trace-element and isotopic compositions are buffered, and that the erupted basalts represent steady-state liquids tapped from these magma chambers.
222 citations