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Factorial correspondence analysis: a useful tool in palaeogeographical reconstructions; example from late Cretaceous calciturbidites of the northwestern External Rif (Morocco)

By
Kh. El Kadiri
Kh. El Kadiri
Université Abdelmalek Essaadi, Faculté des Sciences, BP 2121, Dép. Géologie, M’Hannech II, 93003 Tetuan, Morocco (e-mail: khkadiri@fst.ac.ma)
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K. El Kadiri
K. El Kadiri
Université Abdelmalek Essaadi, Faculté des Sciences, BP 2121, Dép. Mathématiques, M’Hannech II, 93003 Tetuan, Morocco
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A. Chalouan
A. Chalouan
Université Mohammed V-Agdal, Faculté des Sciences, Av. Ibn Batouta, BP 1014, Dép. Géologie, Agdal, 10000 Rabat, Morocco
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A. Bahmad
A. Bahmad
Société Nationale d’Etudes du Détroit de Gibraltar (SNED), 31 r. Al Alaouyine, Rabat, Morocco
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F. Salhi
F. Salhi
Université Chouaib Doukali, Faculté des Sciences, Dép. Géologie, El Jadida, Morocco
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H. Liemlahi
H. Liemlahi
Université Abdelmalek Essaadi, Faculté des Sciences, BP 2121, Dép. Géologie, M’Hannech II, 93003 Tetuan, Morocco (e-mail: khkadiri@fst.ac.ma)
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Published:
January 01, 2006

Abstract

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.

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Contents

Geological Society, London, Special Publications

Tectonics of the Western Mediterranean and North Africa

G. Moratti
G. Moratti
CNR-Institute of Geosciences and Earth Resources, Italy
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A. Chalouan
A. Chalouan
University of Mohammed V Agdal, Rabat, Morocco
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Geological Society of London
Volume
262
ISBN electronic:
9781862395107
Publication date:
January 01, 2006

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