Fall AGU 2001 Session Announcement
Combining the GERM and MARGINS Initiatives
The GERM and MARGINS Initiatives will be presented at the Fall AGU 2001 meeting in one session:
Please consider contributing to these sessions! If you have questions, please contact the conveners!
The GERM Session Program and Abstract Volume in PDF form
V11 Trench-To-Subarc: Diagenetic and Metamorphic Mass Flux in Subduction Zones
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
Phone: 1 610 758 5831
Fax: 1 610 758 3677
Jonathan B. Martin
University of Florida,
Department of Geology
Gainesville, Fl 32611 USA
Phone: 1-352-392-6219
Fax: 1-352-392-9294
Tim Elliott
Cornell University
University of Bristol, Department of Earth Sciences,
Queen's Road, Bristol BS8 1RJ, UK
Phone: 44 117 9545426
Fax: 44 117 9545236