Solid Earth Discuss., https://doi.org/10.5194/se-2018-50 Manuscript under review for journal Solid Earth Discussion started: 27 June 2018 c Author(s) 2018. CC BY 4.0 License. 1 Influence of basement heterogeneity on the architecture of low subsidence rate Paleozoic 2 intracratonic basins (Ahnet and Mouydir basins, Central Sahara) 3 Paul Perron1, Michel Guiraud1, Emmanuelle Vennin1, Isabelle Moretti2, Éric Portier3, Laetitia 4 Le Pourhiet4, Moussa Konaté5 5 1Université de Bourgogne Franche-Comté, Centre des Sciences de la Terre, UMR CNRS 6 6282 Biogéosciences, 6 Bd Gabriel, 21000 Dijon, France. 7 2ENGIE, Département Exploration & Production, 1, place Samuel de Champlain, Faubourg 8 de l'Arche, 92930 Paris La Défense, France. 9 3NEPTUNE Energy International S.A., 9-11 Allée de l'Arche – Tour EGEE – 92400 10 Courbevoie, France. 11 4Sorbonne Université, CNRS-INSU, Institut des Sciences de la Terre Paris, ISTeP UMR 12 7193, F-75005 Paris, France. 13 5Département de Géologie, Université Abdou Moumouni de Niamey, BP :10662, Niamey, 14 Niger. 15 Corresponding author:
[email protected],
[email protected] 16 Abstract 17 The Paleozoic intracratonic North African Platform is characterized by an association of 18 arches (ridges, domes, swells or paleo-highs) and low subsidence rate syncline basins of 19 different wavelengths (75–620 km). The structural framework of the platform results from the 20 accretion of Archean and Proterozoic terranes during the Pan-African orogeny (750–580 Ma). 21 The Ahnet and Mouydir basins are successively delimited from east to west by the Amguid El 22 Biod, Arak-Foum Belrem, and Azzel Matti arches, bounded by inherited Precambrian sub- 23 vertical fault systems which were repeatedly reactivated or inverted during the Paleozoic.