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Volatile (F and Cl) concentrations in Iwate olivine-hosted melt inclusions indicating low-temperature subduction
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2014 (English)In: Earth Planets and Space, ISSN 1343-8832, Vol. 66Article in journal (Refereed) Published
Abstract [en]

Investigation of olivine-hosted melt inclusions provides information about the abundance of volatile elements thatare often lost during subaerial eruptions of lavas. We have measured the abundances of H2O, CO2, F, Cl, and S as well as Pb isotopes in 29 melt inclusions in the scoria of the 1686 eruption of the Iwate volcano, a frontal-arc volcano in the northeast Japan arc. Pb Isotope compositions identify that Iwate magma is derived from a mixture of depleted mantle, subducted basalt, and sediment. Systematics of F in comparison to MORB and other arc magma indicates that (1) the slab surface temperature must be among the lowest on Earth and (2) hydrous minerals, such as amphibole, humites, and/or mica, must be present as residual phases during the dehydration of the slab.

Place, publisher, year, edition, pages
2014. Vol. 66
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Research subject
The changing Earth
URN: urn:nbn:se:nrm:diva-826DOI: 10.1186/1880-5981-66-81OAI: diva2:757023
Available from: 2014-10-20 Created: 2014-10-20 Last updated: 2014-10-21

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Whitehouse, Martin J.
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Department of Geology
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