JISCMail - GEO-METAMORPHISM Archives

Dear colleagues,

Happy (and pressure-free) New year!

we would like to remind you the following session at the next EGU General Assembly in Vienna (27 April - 2 May 2014) – see description bellow.

!!! IMPORTANT !!!: We are happy to announce that an additional EMU travel grant of 400 Euro for promising young scientist is available for this session! Potential candidates can submit their abstract via email to one of the conveners till January 16th, 2013 (same deadline as for the abstract submission). This EMU grant is in addition to the normal EMU Program.

GMPV10 - Deviations from Lithostatic Pressure during Metamorphism: fact or fiction?

Convener: Lucie Tajcmanova
Co-Conveners: Ralf Milke, Holger Stunitz, James Connolly

Invited speakers:

P. Burnley (University of Nevada); O. Plümper (Utrecht University); J. Vrijmoed (University Lausanne); J. Wheeler (University of Liverpool)

Mineral reactions have mechanical effects that may result in the development of pressure variations even on a hand specimen or grain scale and thus are critical for interpreting microstructural and mineral composition observations. Such effects may fundamentally influence element transport properties and rheological behavior. Considering the interplay of metamorphic reactions and mechanical properties is therefore critical for a correct interpretation of microstructural observations in metamorphic rocks as well as for quantification of the processes. Recent microstructural observations and mechanical models taking into account this interplay question our current quantification approach in metamorphic petrology based on the homogeneous pressure assumption. Moreover, recent more common observations of ultra-high-pressure mineral phases in metamorphic rocks also question the simple conversion of pressure estimates into depth through the equation for lithostatic pressure.

Here, we encourage presentations focused on the interplay between metamorphic processes and deformation on all scales, on the rheological behavior of crustal rocks and time scales of metamorphic reactions in order to discuss

(1) how and when pressure variations can be maintained at geological timescales,

(2) modelling of systems with pressure variations,

(3) the impact of non-lithostatic pressure variations on geodynamic reconstructions.

Contributions from natural samples, experiments, as well as theoretical and modelling studies are welcome.

IMPORTANT DEADLINES:

Abstract submission: 16 January 2014, 13.00 CET

Deadline for Early Registration: 4 April 2014

RELEVANT LINKS:

to the session description:

http://meetingorganizer.copernicus.org/EGU2014/session/14814

abstract submission:

https://administrator.copernicus.org/authentication.php