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Date: Saturday, February 18, 2006 6:02 PM -0500
From: Rachid AZZOUN <[log in to unmask]>
To: [log in to unmask]
Subject: call for papers - IGCP 485 MEETING AND FIELD EXCURSION - December 2006
Dear listserv coordinator,
May I ask that this meeting notice be posted to the geo-metamorphism
listserv?
Many thanks for your consideration,
Rachid AZZOUN
Apologies for multiple postings
Cratons are characterized by a rigid behaviour during younger subsequent
orogenesis. The strong rheological contrast with surrounding mobile belts
induces loci favouring in particular magmatism and mineralization. Also,
the craton boundaries may be partly affected, showing characteristics and
behaviour intermediate between a craton in the strict sense and a mobile
belt, which has been called "metacratonic". Metacratons or metacratonic
boundaries are not often recognized and remain poorly understood as they do
not fit the classical models.
West Africa is an excellent place to tackle this problem: a large part of
this area is constituted by the Eburnian (c. 2 Ga) of the WAC surrounded by
Pan-African ( 0.8 - 0.55 Ga) mobile belts, with no Mesoproterozoic event at
all. This major break in age, and the absence of complications caused by
intervening orogenies, is a major advantage when seeking to distinguish
between craton building events and the younger destabilization events.
The project also represents one particular facet that is the classical
objective of IGCP projects: correlation of geology across national borders,
especially across countries whose geology is poorly known to the outside
world. It deals also with mineral deposits in different tectonic settings.
Thus, the special attention will be on the correlations between Morocco,
Mauritania, Mali, Algeria, Niger, Guinea, Burkina Faso, Ghana, Togo, Benin
and Ivory Coast with field meetings scheduled in the four first cited
countries.
This showed the major scientific potential and need for correlation studies
along the boundaries of the WAC and this was at the base of this IGCP 485.
The latter aims of:
(1) studying and correlating tectono-stratigraphic terranes along the West
African Craton margin particularly the Anti-Atlas, Reguibat rise, Tuareg
shield and Ougarta belt ;
(2) determining the nature of the boundaries between the Palaeoproterozoic
and Neoproterozoic terranes, as well as between the Neoproterozoic and
Palaeozoic terranes;
(3) defining the role of the shear zones during accretional events, and of
the magmatism around the continental margins, and testing the concept of
metacraton.
(4) deciphering the thermal evolution and geochronology of key lithologies
and characteristic mineral deposits.
(5) replacing the WAC position during the Neoproterozoic within the
framework of the construction of Rodinia and Gondwana supercontinents.
(6) Cenozoic volcanism and their relationships with shear zones
Deadline for submission of a title: March, 15 2006
Deadline for submission of the paper: June, 15 2006
Organizing Committee of the ICPG 485:
Tél: + 213 21 24 76 47 ; Fax : + 213 21 24 76 47; [log in to unmask]
Correspondence :
Abla Azzouni: [log in to unmask]
Khadidja Ouzegane [log in to unmask]
Nasser Ennih [log in to unmask] and [log in to unmask]
Jean Paul Liégeois [log in to unmask]
For more information see
http://www.ucd.ac.ma/fs/igcp485/
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Dr Gawen RT Jenkin
Leicester Physical Sciences 3rd in First National Student Survey
Geology Department Student Recruitment and Schools Liaison Tutor
www.le.ac.uk/geology/prospective/welcome.html
Universities Representative Mineral Deposits Studies Group mdsg.org.uk
Geo-metamorphism Listowner www.jiscmail.ac.uk/lists/geo-metamorphism.html
Lecturer in Applied Geology direct dial: +44 (0116) 252 3934
Department of Geology general office: +44 (0116) 252 3933
University of Leicester fax: +44 (0116) 252 3918
LE1 7RH, UK
For current PhD projects see www.le.ac.uk/geology/grtj1
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