Factorial correspondence analysis: a useful tool in palaeogeographical reconstructions; example from late Cretaceous calciturbidites of the northwestern External Rif (Morocco)
Kh. El Kadiri, K. El Kadiri, A. Chalouan, A. Bahmad, F. Salhi, H. Liemlahi, 2006. "Factorial correspondence analysis: a useful tool in palaeogeographical reconstructions; example from late Cretaceous calciturbidites of the northwestern External Rif (Morocco)", Tectonics of the Western Mediterranean and North Africa, G. Moratti, A. Chalouan
Download citation file:
Factorial correspondence analysis proved to be a useful statistical tool when comparing the clastic input of distinct deposits and searching for their source area. Here we analyse and compare the reworked carbonate clastic material in the late Cretaceous calciturbidites of the Béni Ider area (Rifian External Domain) and the Internal Dorsale Calcaire (Internal Domain). The main result is that the source area for the Béni Ider calciturbidites was a neighbouring, isolated, shallow carbonate platform, the basement of which consists of a Jurassic succession of the Internal Dorsale Calcaire type. However, statistical comparison with the coeval pelagic deposits of to the latter domain leads us to exclude the Dorsale Calcaire as a possible origin of these Béni Ider calciturbidites. The source area was probably a lost carbonate platform, which should be located in the open External Domain. This result appears to be consistent with the Tariquide Ridge hypothesis and gives new insights into the palaeogeographical scheme of the flysch trough.
Figures & Tables
This book provides an insight into the overall tectonic evolution of the Western Mediterranean region and North Africa. The tectonic setting of the region reflects a long-lived and complex evolution, mainly related to the Alpine Orogeny. This inheritance is expressed by an intricate pattern of arc-shaped mountain chains, the Alps, the Betic–Rif Cordilleras and the Apennine–Maghrebian belt, whose southern branches mark the present limit between the African and Eurasian plates. The volume covers the Maghrebian chains in North Africa, from Tunisia to Morocco and the Western and Central Mediterranean, from Spain to Italy from the pre-orogeric phases (Palaeozoic–Mesozoic) to the post-collisional neotectonic and Quaternary development. It includes both original research papers and syntheses dealing with the aspects of structural, sedimentary, metamorphic and marine geology.