************************************************ 2006 EGU Spring Meeting Session Reminder: The origin of the slab component in island arcs ************************************************ From: Timm John <tj@xxxxxxxxxxxxxxx> Dear newsgroup member -apologies for multiple postings-, we would like to remind you of the session "The origin of the slab component in island arcs: H2O-rich fluid or melt- who delivers the goods?" at the 2006 EGU Meeting ( http://www.cosis.net/members/ meetings/programme/view.php?m_id=29&p_id=195 ). The meeting is being held in Vienna, Austria on April 02 to 07, 2006. Abstract deadline is January 13 Our solicited speakers to date are Horst Marschall (University of Bristol), Taras Gerya (ETH Zuerich) and Marco Scambelluri (Universita di Genova). Best regards, Thomas Zack and Timm John The origin of the slab component in island arcs: H2O-rich fluid or melt- who delivers the goods? (GMPV5) There is a consensus in the geoscience community that arc magmatism has a distinct chemical signature due to the addition of certain trace elements (e.g. Li, B, LILE, LREE) carried by slab-derived agents. What has yet to be established are the mechanisms by which these elements are transported from sources within the slab into the overlying wedge, and how fluids or melts -- or both -- are related to this process. Current debate centers on whether melts are the main or even sole agent responsible for the mobilization of the required amounts of trace elements. Some studies suggest that hydrous fluids are sufficiently reactive to scavenge these elements in open systems. Also under discussion are the subducted sediments, which are thought to be an important trace element source. Confirming or contradicting these claims will place first order constraints on the thermal structure of subduction zones. In this session we will address these issues by bringing together experimental and metamorphic petrologists, geochemists, geophysists, and modelers. " ------------------------------------ Thomas Zack Mineralogisches Institut Universitaet Heidelberg INF 236 69120 Heidelberg Germany tzack at min.uni-heidelberg.de Timm John Institut für Geowissenschaften, Abteilung Mineralogie - Petrologie Universität Kiel D-24098 Kiel, Germany tj at min.uni-kiel.de ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
