Dear Colleagues,
A quick note to call your attention to a special session, at the upcoming AGU
meeting in San Francisco (Sept. 10-14), dealing with chemical flux in forearc and
subarc regions of subduction zones. Aspects of this flux that would be of
interest include (but are not limited to): devolatilization histories; fluid-rock
interactions and fluid mobility; mineral-fluid trace element partitioning and
consequences; and experimental studies of stabilities of key volatile-rich phases
in subducting rocks.
Please note that the deadline for electronic abstract submissions is September 6.
For more information regarding this meeting, see:
http://agu.org/meetings/fm01top.html
Please contact me by e-mail with any questions (regarding this session).
Best regards,
Gray Bebout
Lehigh University
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V11: Trench-To-Subarc: Diagenetic and Metamorphic Mass Flux in Subduction Zones
(GERM/MARGINS Subduction Factory Session)
Co-sponsors: OS, T, MRP
Recent study has indicated that profound chemical alteration of subducting
materials and related mass flux in fluids occur in forearc regions, beginning
with diagenesis at extremely shallow levels, and continuing during prograde,
high-P/T metamorphism and perhaps even partial melting of some lithologies in
some subduction zones. In this session, we hope to comprehensively consider
forearc diagenetic and metamorphic mass flux and its significance for the cycling
of materials through convergent margins. We invite abstracts dealing with any
and all aspects of this flux and the ways in which its global significance can be
evaluated. Topics to be addressed include, but need not be limited to: fluid-
flow and chemical alteration accompanying diagenesis during fluid expulsion in
accretionary prisms; effects of prograde metamorphic devolatilization on the
compositions of subducting materials and the production and mobility of
metamorphic fluids; chemical processing in subducting slabs and sediments as
recorded in serpentinite seamounts, mud volcanoes, and arc lavas (including
across-arc suites); and the potential significance of forearc chemical alteration
of subducting rocks for deep-mantle chemical heterogeneity. We encourage both
abstracts presenting examples from individual modern or ancient convergent
margins and abstracts presenting broader synthesis views. We hope to attract not
only geochemical studies, but also studies attacking these problems from
geophysical and theoretical approaches.
Conveners: Gray E. Bebout, Lehigh University, Department of Earth and
Environmental Sciences, Bethlehem, PA 18015 USA, Tel: +1-610-758-5831, Fax: +1-
610-758-3677, E-mail: [log in to unmask]; and Jonathan B. Martin, University of
Florida, Department of Geology, Gainesville, Fl 32611 USA, Tel: +1-352-392-6219,
Fax: +1-352-392-9294, E-mail: [log in to unmask]; and Tim Elliott,
University of Bristol, Department of Earth Sciences, Wills Memorial Building,
Queen's Road, Bristol BS8 1RJ, UK, Tel, +44-117-9545426, Fax: +44-117-9545236, E-
mail: [log in to unmask]
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