Olivine-Hosted Melt Inclusions Track Progressive Dehydration Reactions in Subducting Slabs Across Volcanic Arcs

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dc.citation.issue4
dc.citation.volume65
dc.contributor.authorBrahm R
dc.contributor.authorCoulthard D
dc.contributor.authorZellmer G
dc.contributor.authorKuritani T
dc.contributor.authorSakamoto N
dc.contributor.authorTaniuchi H
dc.contributor.authorYurimoto H
dc.contributor.authorNakagawa M
dc.contributor.authorSato E
dc.date.accessioned2024-08-29T21:34:28Z
dc.date.available2024-08-29T21:34:28Z
dc.date.issued2024-04
dc.description.abstractThe stability and breakdown of mineral phases in subducting slabs control the cycling of trace elements through subduction zones. Stability of key minerals and the partitioning of trace elements between these minerals and liquid phases of interests have been charted by natural sample analysis and experimental constraints. However, systematic study from arc front to far back arc has rarely shown that the expected geochemical variations of the slab liquid are actually recorded by natural samples. Complexities arise by uncertainties on the nature of the slab component (melts, f luids and supercritical liquids), source heterogeneities and transport processes. Using data from olivine-hosted melt inclusions sampled along and across the NE Japan and southern Kurile arcs, we demonstrate that experimentally and thermodynamically constrained phase stabilities in subducted materials indeed control the trace element signatures as predicted by these models and experiments. The main reactions that can be traced across arc are progressive breakdown of light rare earth element-rich accessory phases (e.g. allanite), enhanced dehydration of the lithospheric mantle (serpentine breakdown) and changes in the nature of the slab component. This work elucidates subduction zone elemental cycling in a well-characterized petrogenetic setting and provides important constraints on the interpretation of trace element ratios in arc magmas in terms of the prograde metamorphic reactions within the subducting slab.
dc.description.confidentialfalse
dc.edition.editionApril 2024
dc.identifier.citationBrahm R, Coulthard D, Zellmer G, Kuritani T, Sakamoto N, Taniuchi H, Yurimoto H, Nakagawa M, Sato E. (2024). Olivine-Hosted Melt Inclusions Track Progressive Dehydration Reactions in Subducting Slabs Across Volcanic Arcs. Journal of Petrology. 65. 4.
dc.identifier.doi10.1093/petrology/egae017
dc.identifier.eissn1460-2415
dc.identifier.elements-typejournal-article
dc.identifier.issn0022-3530
dc.identifier.numberegae017
dc.identifier.urihttps://mro.massey.ac.nz/handle/10179/71396
dc.languageEnglish
dc.publisherOxford University Press
dc.publisher.urihttps://academic.oup.com/petrology/article/65/4/egae017/7616493
dc.relation.isPartOfJournal of Petrology
dc.rights(c) 2024 The Author/s
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleOlivine-Hosted Melt Inclusions Track Progressive Dehydration Reactions in Subducting Slabs Across Volcanic Arcs
dc.typeJournal article
pubs.elements-id488173
pubs.organisational-groupOther
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