Published in:Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Bilateral seminars of the International Bureau 32, VI, 193 S. (1999).
Language:
English
ISBN:
3-89336-253-3
ISSN:
0938-7668
Origination:
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
A meeting convened at Heidelberg devoted two days, October 22nd and 23rd, 1998, to discuss a number of topics an the Pan-African of (northern) Africa. Proceeding from Egypt and Morocco as the regional focus of studies from our Heidelberg working group in the Frame of bilateral cooperation projects, we were glad to receive, and accept, contributions from other working groups an different aspects and areas of Pan-African tectonics. These contributions are now presented here. In addition, there are also a few texts from colleagues who were unable to come to Heidelberg. The Pan-African took place between c. 700 and 550 Ma ago and affected both pre-existing continental terranes and oceanic and magmatic arc terranes. For reviews, see, for example, Stern (1994), EI Gaby & Greiling (1988), Kröner (1984). Recently, it has been attempted to re-assemble Gondwana into its Pan-African shape, prior to the syn- and post-Pan-African breakup into the continents we see today, by Unrug (1996, 1997). From this latter work, Figure 1 is modified. It gives an overview over the actual area at about 650 Ma ago and shows the importance of the Pan-African orogeny for the formation of Gondwana and the surrounding continents. The present contributions cover three areas in Western Gondwana: Namibia, Morocco, and the Arabian-Nubian Shield. All three of them are highlighted by arrows. The contributions tackle various aspects of the Pan-African evolution and different episodes, starting with the pre-collisional evolution and ending with late- and post-tectonic events. Accordingly, we have tried to group the papers into three sections: I. Accretion- and collision-related magmatism, metamorphism and structure (8 contributions) II. Shear zones and mineralization(7 contributions) III. Post-collisional evolution and extension (9 contributions) A brief introduction to the individual papers is given at the beginning of each of the three sections. As a matter of fact, the arrangement may notalways appear as logical. However, we feel this grouping ...