Fault analysis and its relationship with karst structures affecting Lower Jurassic limestones in the Agourai plateau (Middle Atlas, Morocco)
2018; Issue: 63 Linguagem: Inglês
ISSN
2173-6545
AutoresHmidou El Ouardi, Mustapha Boualoul, Hafida Ouhaddach, Mohamed Habibi, Anselme Muzarafuti, Abdelhamid Allaoui, Afaf Amine,
Tópico(s)African Studies and Geopolitics
ResumoespanolEste trabajo muestra un analisis de la fracturacion a diferentes escalas que afecta a las calizas del Jurasico Inferior del plateau de Agourai, Atlas Medio Esta zona pertenece al cinturon su bhorizontal medio del Atlas y ha sufrido una evolucion tectonica polifasica, con depresiones karsticas alineadas NE-SO paralelas a las fallas principales. Este estudio esta basado en el analisis de la fracturacion y la determinacion de relaciones entre los eventos tectonicos y el desarrollo de las principales estructuras karsticas, que corresponden con dolinas alineadas formando sistemas de uvalas. Analizamos la distribucion karstica a lo largo de las fallas principales que a fectan a las calizas del Lias y describimos los rellenos karsticos de algunas de ellas. EnglishThis study analyzes the fracture network at different scales in the Lower Jurassic limestones outcropping in the Agourai plateau, Middle Atlas, and their relationship with karst structures. This zone belongs to the Sub-Tabular Middle Atlas belt, called “Causses Moyen-Atlasiques”. This area underwent a polyphased tectonic evolution, involving karst depressions aligned NE-SW parallel to the main faults. The approach is based on the fracturing analysis and the determination of relationships between tectonic events and the main karstic structures development, corresponding to aligned dolines forming important uvala systems. We analyze the karst distribution along the main faults affecting Liassic car- bonates and we describe some karst sedimentary fill.
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