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11B-rich fluids in subduction zones: The role of antigorite dehydration in subducting slabs and boron isotope heterogeneity in the mantle

Harvey, Jason; Garrido, Carlos J; Savov, Ivan P.; Agostini, Samuele; Padron-Navarta, Jose; Marchesi, C; Sanchez-Vizcaino, V; Gomez-Pugnaire, Maria Teresa


Serpentinites form by hydration of mantle peridotite and constitute the largest potential reservoir of fluid-mobile elements entering subduction zones. Isotope ratios of one such element, boron, distinguish fluid contributions from crustal versus serpentinite sources. Despite 85% of boron hosted within abyssal peridotite being lost at the onset of subduction at the lizardite-to-antigorite transition, a sufficient cargo of boron to account for the composition of island arc magma is retained (c....[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
Source: Chemical Geology
DOI: 10.1016/j.chemgeo.2014.03.015


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