Behaviour of Volatiles and Fluid-Mobile Elements in Subduction Zones
A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".
Deadline for manuscript submissions: closed (18 June 2021) | Viewed by 13724
Special Issue Editors
Interests: volatiles; subduction zones; trace element and stable isotope geochemistry; serpentinites; olivine; nominally anhydrous minerals; inclusions in diamonds; analytical geochemistry
Special Issue Information
Subduction zones are amongst the most important manifestations of plate tectonics on Earth. Specifically, tectonic recycling of the oceanic lithosphere is a key control of the volatile element distribution between the Earth’s surface and the Earth’s interior. Volcanic arcs associated with subduction zones degas deeply subducted volatiles back to the Earth’s surface and sustain Earth’s habitability, whilst the volatile return flux into the deep mantle determines the long-term evolution of the crust, oceans, and atmosphere. The release of slab fluids during prograde metamorphic reactions plays a key role in subduction zone volatile processing. Due to the transient nature of slab fluids, their sources and pathways are commonly tracked using fluid-mobile elements (FME) such as halogens, lithium, boron, and various metals including alkalis. Despite considerable advances during the last decades in our understanding of volatile recycling, the nature of subduction-related geochemical exchanges and associated fluxes in and out of the deep Earth, their mineralogical and redox controls, as well as the nature and the fingerprint of the slab-derived fluids, are still poorly constrained.
This Special Issue aims to attract studies of the path of volatiles and fluid-mobile elements from the Earth’s surface reservoirs to the upper mantle or back to the surface. We invite natural, experimental, and theoretical studies from geochemists, petrologists, mineralogists, and geophysicists to cover this topic from different perspectives. Potential topics to be addressed are as follows:
(1) transport mechanisms of volatiles and FME in subduction zone settings; (2) incorporation mechanisms of volatiles and FME in nominally anhydrous minerals (NAMs) and their effect on mineral properties and mantle rheology; (3) high-pressure and temperature studies of volatile-bearing phases; (4) volatile and FME abundances in exhumed high- and ultrahigh-pressure metamorphic rocks and their implication for subduction-related volatile recycling; (5) redox effects of (de)volatilization reactions in subducting slab and overlying mantle wedge.
Dr. Jan C.M. De Hoog
Dr. Kristina Walowski
Guest Editors
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Keywords
- subduction recycling
- volatile reservoirs
- fluid-mobile elements
- nominally anhydrous minerals
- fluid processes
- redox reactions
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