Detrital zircon U-Pb ages in the Rif Belt (northern Morocco): Paleogeographic implications |
| |
| Institution: | 1. Faculté Pluridisciplinaire de Nador & Laboratoire des Géosciences Appliquées, Faculté des Sciences, Université Mohammed I, Oujda, Morocco;2. Department of Geodynamics, University of Granada, Granada, Spain;3. School of Geosciences, University of Edinburgh, The King''s Building, James Hutton Road, EH9 3FE, Edinburgh, UK;4. Laboratoire de Géo-biodiversité et du Patrimoine Naturel (GEOBIO), Centre de Recherche \"Geophysics, Natural Patrimony and Green Chemistry\" (GEOPAC), Institut Scientifique, Université Mohammed V de Rabat, Morocco;5. John de Laeter Center, Curtin University, Bentley 6845, Australia;6. School of Earth and Planetary Science, Curtin University, Perth, WA, Australia;1. Department of Geosciences, Biogeology, University of Tübingen, Hölderlinstrasse 12, 72074 Tübingen, Germany;2. Senckenberg Research Centre for Human Evolution and Paleoenvironment, University of Tübingen, Hölderlinstrasse 12, 72076 Tübingen, Germany;3. Instituto de Investigaciones Arqueológicas y Paleontológicas del Cuaternario Pampeano (INCUAPA-CONICET), Universidad Nacional del Centro de la provincia de Buenos Aires, Del Valle 5737, B7400JWI Olavarría, Buenos Aires, Argentina;4. Museo Municipal de Ciencias Naturales Pachamama, Santa Clara del Mar, Argentina;5. Universidad Nacional de Mar del Plata, Argentina;6. Div. Paleontología Vertebrados, Museo de La Plata, Paseo del Bosque, 1900 La Plata, Argentina;7. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja (CRILAR), Provincia de La Rioja, UNLaR, SEGEMAR, UNCa, CONICET, Entre Ríos y Mendoza s/n, 5301 Anillaco, La Rioja, Argentina;1. Géoazur, Université Côte d''Azur, CNRS, IRD, Observatoire de la Côte d''Azur, UMR 7329, 250, rue Albert-Einstein, 06560 Sophia Antipolis, France;2. Czech Geological Survey, Centre for Lithospheric Research, Klárov 3, 118 21 Prague 1, Czech Republic;3. Institut des Sciences de la Terre d''Orléans, Université d''Orléans, CNRS, UMR7327, INSU, Bureau de Recherches Géologiques et Minières, Campus Géosciences 1A, rue de la Férollerie, 45071 Orléans cedex 2, France;4. Géosciences Montpellier, UMR 5243, Université Montpellier 2, CC 060, place Eugène Bataillon, 34095 Montpellier cedex 5, France;5. Département de Géologie, Université Abdelmalek Esaadi, 93003 Tetouan, Morocco |
| |
| Abstract: | Detrital zircon U-Pb age distributions in Mesozoic and Cenozoic rocks from the External Rif and Maghrebian Flysch Complex (including the so-called Mauretanian internal flysch units) are very similar, strongly suggesting that the External Rif and the entire Maghrebian Flysch Complex were part of the same NW African paleomargin. These patterns include scarce Paleozoic zircon grains that show influence from the Sehoul Block. Neoproterozoic and Paleoproterozoic grains are abundant with a dominant Ediacaran zircon population at ca. 590 Ma, which could have been sourced from the Variscan Moroccan Mesetas, the northern components of the West African Craton, or from Triassic sediments from the Central High Atlas and Argana basins. Mesoproterozoic zircon ages between 1.1 and 1.6 Ga were also observed (15% in the combined age spectra), the nearest sources for these being in the central part of the West African Craton. Transport of the Mesoproterozoic grains to the NW African paleomargin requires northward-directed fluvial systems parallel to the Central Atlantic continental margin of Africa. In contrast, samples from the Internal Rif or Alborán Domain are different to those from the External Rif and Maghrebian Flysch Complex, especially in the scarcity of Mesoproterozoic zircons, suggesting that the Alborán Domain was not a source area for zircons found in the NW African paleomargin. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
