Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2015 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S1-P01
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S1: Igneous processes and fluids
Contributions from slab-derived fluids traced by halogens in mantle xenoliths from subduction zones
*Masahiro KobayashiHirochika SuminoKeisuke NagaoRay BurgessSatoko IshimaruShoji AraiMasako YoshikawaTatsuhiko KawamotoYoshitaka KumagaiTetsuo KobayashiMichihiko Nakamura
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Abstract

Halogens are powerful tracers of subducted water. In order to investigate the influence of slab-derived fluids and the phase which control halogens in the mantle wedge, halogens of mantle xenoliths from volcanic fronts (Avacha and Pinatubo) and rear-arc region (Ichinomegata) were determined. Iodine-rich slab-derived halogens strongly extend into the mantle beneath volcanic fronts. Contributions from various components were found in the rear-arc region and they seem to be controlled by halogens in clinopyroxenes.

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© 2015 Japan Association of Mineralogical Sciences
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