2019
DOI: 10.1029/2019gc008336
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Effect of Serpentinite Dehydration in Subducting Slabs on Isotopic Diversity in Recycled Oceanic Crust and Its Role in Isotopic Heterogeneity of the Mantle

Abstract: We conducted geochemical modeling of the isotopic evolution of subducted oceanic crust that takes into account the chemical variation produced at mid‐ocean ridges and in subduction zones, and examined the suitability of our model for generating the high‐μ (HIMU), focal zone (FOZO), and prevalent mantle (PREMA) mantle components. Chemical variation produced at mid‐ocean ridges was represented by the chemical compositions of two groups of mid‐ocean ridge basalts (depleted and enriched). Chemical variation produc… Show more

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Cited by 11 publications
(6 citation statements)
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References 166 publications
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“…Second, the magnitudes of slab surface fluxes are substantially increased by the elevated basal H 2 O content. Figures e–h show that serpentinite dehydration can dominate other controls of slab surface CO 2 and H 2 O fluxes and thus can play a crucial role in arc magmatism and subduction‐zone volatile recycling (Shimoda and Kogiso, ).…”
Section: Resultsmentioning
confidence: 99%
“…Second, the magnitudes of slab surface fluxes are substantially increased by the elevated basal H 2 O content. Figures e–h show that serpentinite dehydration can dominate other controls of slab surface CO 2 and H 2 O fluxes and thus can play a crucial role in arc magmatism and subduction‐zone volatile recycling (Shimoda and Kogiso, ).…”
Section: Resultsmentioning
confidence: 99%
“…They showed the importance of redistribution of carbon by fluid flow within the lithological layers and that the subduction efficiency of H 2 O and CO 2 is increased by fractionation within the subducting lithologies. These approaches do not only facilitate the understanding of the release of fluids and their contribution to subduction zone processes, but also have been used as input to global models predicting the long term chemical evolution of the Earth's mantle (e.g., Kimura et al, 2016;Shimoda and Kogiso, 2019). In a separate study, Smye et al (2017) used the global set of thermal models to quantify noble gas recycling into the deep mantle.…”
Section: Mobilization and Deep Cycling Of Volatilesmentioning
confidence: 99%
“…Tian et al (2019) lithologies. These approaches not only facilitate our understanding of the release of fluids and their contribution to subduction zone processes, but also have been used as input to global models predicting the long term chemical evolution of the Earth's mantle (e.g., Kimura et al, 2016;Shimoda and Kogiso, 2019). In a separate study, Smye et al (2017) used the global set of thermal models to quantify noble gas recycling into the deep mantle.…”
Section: Mobilization and Deep Cycling Of Volatilesmentioning
confidence: 99%