Subduction fluxes through geologic time

Ludden, John. 2009 Subduction fluxes through geologic time. Applied Geochemistry, 24 (6). 1052-1057. 10.1016/j.apgeochem.2009.02.015

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Abstract/Summary

Geochemical models have convincingly demonstrated that sediment and altered oceanic crust must be recycled into the mantle through subduction zones. These ‘subduction factories’ use these components, along with molten mantle, to create arc magmas. The ‘residue’ from this process is recycled into the mantle and has a modified chemical and mineralogical composition. The altered oceanic crust input function in the current plate tectonic cycle seems to be relatively constant in composition, but the chemical compositions of the sediment fluxes into subduction zones vary widely and control many of the end-member compositions of arc magmas. They must also control the compositions of fluids and gases derived from these magmas and ultimately ore-deposition and atmospheric fluxes associated with arc volcanoes.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/j.apgeochem.2009.02.015
Programmes:	BGS Programmes 2008 > Earth hazards and systems
ISSN:	0883-2927
NORA Subject Terms:	Earth Sciences
Date made live:	07 May 2009 13:07 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/7127

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