2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2 From: Marian Holness <marian@xxxxxxxxxxxxx> 2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2-2 Dear Colleagues, We would like to draw your attention to the following session at the 2019 AGU Fall Meeting. *V031 - Magmatic Sedimentology: a Critical Appraisal of Crystal Re-distribution in Plutons* Many plutons preserve magmatic structures that bear a geometric resemblance to those in sedimentary rocks. Examples include mineral grading in layering apparently formed by hydrodynamical sorting, trough-like structures with local truncations consistent with erosion and re-deposition, fluid escape and loading structures, and fabrics defined by preferred grain orientations. We know little about the scale and mechanisms of crystal re-distribution during convection and magmatic flow in igneous bodies despite this playing a vital role in magmatic evolution. Solving the problem requires an understanding of the fluid dynamical behaviour of cohesive, particle-rich, high-viscosity systems undergoing solidification with or without an externally-imposed stress. A critical part of the solution will involve the development of robust proxies to decode the record of crystal re-distribution in now fully-solidified plutonic rocks. We welcome contributions from field, laboratory and theoretical studies of mass transport in solidifying magmatic systems, from layered mafic intrusions to granitoids. We are delighted to have *George Bergantz* (talk title: Forces, friction and fabric: microstructural controls on common plutonic fabrics) and *Roberto Weinberg* (talk title: Crystal - melt separation in magmas: the field evidence) as invited speakers. Please consider submitting an abstract by the *July 31 deadline*. We are looking forward to an stimulating AGU Fall Meeting! Best wishes from the session convenors Marian Holness (Cambridge) Scott Paterson (University Southern California) Katie Ardill (University Southern California) Charlotte Gordon (Cambridge) ============================================================== Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI). ASU - http://www.asu.edu/ PSU - http://pdx.edu/ GVP - http://www.volcano.si.edu/ IAVCEI - https://www.iavceivolcano.org/ To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxx. To contribute to the volcano list, send your message to: volcano@xxxxxxx. Please do not send attachments. ============================================================== ------------------------------
