[iris-bulk] Fall AGU sessions - DI05

[Debayle eric]

Dear Colleagues,

We warmly encourage you to submit abstracts to the session 'The Deep
Earth’s Mantle Above the CMB: Structure, Composition Dynamics and
Evolution' (DI05) that we will organize at the next Fall AGU (San
Francisco, 15-19 December 2008).

We particularly welcome inovative contributions from geodynamics,
geochemistry, mineral physics and seismology. Discussions will focus on
current views on the mantle structure, dynamics and evolution. Note that
the deadline for submission is 10 September 2008. Please feel free to
forward to your colleagues that would be interested in this topic. Thank
you very much.

We hope to meet you there!

Frederic Deschamps, Eric Debayle and Nicolas Coltice


DI05: The Deep Earth’s Mantle Above the CMB: Structure, Composition
Dynamics and Evolution 

Our knowledge of the deep (2000 km to CMB) Earth’s mantle has made
tremendous progresses during the past decade. New discoveries and models
have challenged the usual picture of a nearly homogeneous structure.
Instead, seismological models observe strong lateral variations in
seismic velocities that may result from both thermal and chemical
anomalies. The nature and origin of these anomalies is still uncertain,
but ingredients like the post-perovskite phase and reservoir(s) of dense
material formed early in the Earth history and buried since then might
play a significant role. Our view of this part of the Earth remains thus
unclear. In this multidisciplinary session, we aim to discuss the latest
experimental results, models and observations related to the properties
of the deep mantle. A non-exhaustive list of the topics we would like to
discuss includes: the newest results on the thermo-elastic, transport,
and electrical properties of the lower mantle materials and their
consequences on various observables (anisotropy, magnetic field); the
formation, composition and evolution of reservoir(s) of dense materials;
the most recent tomographic images of the deep mantle, and the way to
interpret them; the existence and distribution of post-perovskite at the
bottom of the mantle; the most recent progress in numerical modeling of
thermo-chemical convection. We welcome contributions in geodynamics,
geochemistry, mineral physics, seismology, and geomagnetism that
incorporate new constraints and apply new techniques in order to push
the frontiers of our understanding of the deep Earth’s mantle structure,
composition, dynamics and evolution.

Convener:  Frederic Deschamps
Federal Institute of Technology of Zurich
ETH Honggerberg, HPP L8.1
Zurich, CHE  8093
410446336806
deschamps at erdw.ethz.ch

Eric Debayle
Ecole et Observatoire des Sciences de la Terre
Strasbourg, FRA 
Eric.Debayle at eost.u-strasbg.fr

Nicolas Coltice
Universite de Lyon 1
Lyon, FRA 
coltice at univ-lyon1.fr

Sponsor:  Study of Earth's Deep Interior
CoSponsor:  Mineral and Rock Physics, Seismology