Staff directory
Jean-Paul Liégeois
Earth Sciences
Geodynamics and mineral resources
Geodynamics and mineral resources
Publication details
Liégeois, J.P. 2019. ‘A New Synthetic Geological Map of the Tuareg Shield: An Overview of Its Global Structure and Geological Evolution’. In: A. Bendaoud, Z. Hamimi, M. Hamoudi, S. Djemai, B. Zoheir (ed), The Geology of the Arab World - An Overview. Series ‘Springer Geology’. Springer Cham, pp. 83-107. (PR) ISBN: 978-3-319-96793-6. DOI: https://doi.org/10.1007/978-3-319-96794-3_2.
Chapter in an edited book / Article in an edited book
Here is presented a geological map of the Tuareg Shield (Algeria, Mali,
Niger), based on the various available geological maps, which are often old and
uneasily available, and on the various papers published during the last decades
that give mapping or geochronological information. This work has been initiated
by the new geological map of Africa at the scale of 1/10,000,000 for which a
largely simplified version has been used. The present map focuses on the age of
the large magmatic units and of their basement, including the age of the major
reactivations that may have affected them. The publication here of this georeferenced
map at an appropriate resolution will be useful for future studies at both
local and regional scales but also allows to synthetize and discuss the different
concepts that have been applied to the Tuareg Shield: the terrane structure, for
which some modifications are proposed, the localization of the different
Paleoproterozoic orogenies, of the Neoproterozoic juvenile terranes and of the
Pan-African reactivation of the old blocks that generated metacratonic terranes or
associations of terranes. This map allows also to visualize the eastern margin of
the West African craton and the western margin of the Saharan metacraton and the
influence of the Murzukian orogeny. Finally, different provinces, separated by
oceans prior to the Pan-African orogeny are proposed as well as a global model
for their amalgamation.