Dear colleagues,
We would like to invite you to contribute to the session TS6.4 of EGU meeting in Vienna (2nd- 7th May 2010)
Cratons and surrounding mobile belts: evolution, interplay and interferences. The West African case study
Convernors:
Lenka Baratoux (LMTG, Toulouse, France)
Jean-Paul Liégeois (African Museum, Tervuren, Belgium)
Séta Naba (Univ. Ouagadougou, Burkina Faso)
Mark Jessell (IRD LMTG, Toulouse, France)
A description of the session can be found below and on:
http://meetingorganizer.copernicus.org/EGU2010/session/2474
The on-line abstract submission is JANUARY 18th, 2010. The deadline for the submission of support applications is December 4, 2009.
For further information please feel free to contact anyone of us (e-mail addresses are given below) or consult the official conference website http://meetings.copernicus.org/egu2010/home.html. We apologize for multiple postings.
We are looking forward to seeing you in Vienna
Lenka Baratoux
Summary of the session:
The recent accumulation of metamorphic, geochronological and
geophysical data across the West African Craton and its margins allows us to
take a fresh look at this ancient terrain. This session will focus on the
craton-scale evidence for the formation and evolution of the craton during the
Archaean and Palaeoproterozoic, as well as its subsequent modification by the Pan-African
Mobile Belts. An understanding of the processes of cratonization and
characterization of major Archaean and Eburnean structures is crucial for
determination of pre-existing crustal inhomogeneities susceptible to be
reactivated during the Pan-African orogeny. Conversely we also need to
constrain precisely the deformation features in the Pan-African orogens, so we
can better determine the penetration of this event into the craton. Relations
between the Archaean/Palaeoproterozoic domains present in the West African
craton and in the surrounding mobile belts, especially the Trans-Saharan belt
have also to be deciphered.
The great advantage of West Africa is that we
can observe and describe processes leading to the formation of Archaean and
Palaeoproterozoic terranes cratonized during the long Mesoproterozoic tectonic
quiescence and then largely well preserved. Their reactivations occurred only
during the Neoproterozoic Pan-African orogeny, generating for instance a strong
and useful isotopic constrast.
Contributions are welcome on all aspects of research providing new insights
into the evolution of the West African craton, and/or its subsequent
modification during the Pan-African as well as of the surrounding mobile belts.
Comparisons with similar problematic outside of West
Africa are also welcome.
Lenka Baratoux ([log in to unmask])
Jean-Paul Liégeois ([log in to unmask])
Séta Naba ([log in to unmask])
Mark Jessell ([log in to unmask])