La fracturation et les bandes de déformation dans la région d’El Kohol (Atlas saharien central, Algérie): analyse fractale, lois d’échelles et modèle de réseaux de fractures discrètes

Zazoun, Réda Samy; Marok, Abbas; Samar, Louisa; Benadla, M.; Mezlah, H.

doi:10.3989/egeol.42011.359

Cited by 4 publications

(2 citation statements)

References 38 publications

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“…A fractal object is a mathematical object resulting from an iterative process and which presents a character of invariance of scale. The size of a fractal set varies as the scale to which it is examined, given by dimension fractal (Mandelbrot 1982;Wornell 1996). In reality, there does not exist any definition of the concept of fractal which is unanimously accepted.…”

Section: Theoretical Aspect Of Fractal and Multifractal Analysismentioning

confidence: 99%

Multifractal Scaling characteristics of lineament networks of a fractured sandstone aquifer system

Abdi,

Chettih

2024

Earth Sci Inform

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In this work, we have shown that we can carry out a multifractal characterization of fracturing from a network of lineaments, using a calculation code that we have developed ourselves and that we have named: 2D Calculation Code for Multifractal Analysis of Fracture Networks (2D-MAFN). Four lineament maps at different scales were analyzed, corresponding to the Upper Jurassic and Cretaceous geological formations of the El Gada region in the Central Algerian Saharan Atlas.The geometric analysis of the lineament networks showed good consistency between the lineament networks and the geological structure of the Atlas Range and its fault network. It also showed that the distribution of the lengths of the lineaments fits the power law. This analysis also revealed that, on a larger scale, diffuse fracturing appears to be more prevalent. In addition, the spectral analysis, through the decrease in spectral power according to a power law, characterizes a self-similar behavior and already seems to prove the scale invariance of the lineaments.The fractal dimension values obtained reflect the extent of fracturing and the degree of complexity of the network of lineaments. These values show that the lineaments are also well correlated with each other. The partition functions show that the points line up on the adjustment lines according to a law characteristic of multifractal behavior. In addition, the curves of generalized dimensions as a function of moments show a clear decrease, highlighting the multifractal nature of the fracturing process. In addition, the multifractal spectra in the form of bell curves also confirm the multifractal process for the four lineament networks analyzed.The results obtained are very encouraging and open up the prospects of modelling fracture networks for a variety of purposes, including assessing the connectivity of a fracture network.

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Section: Theoretical Aspect Of Fractal and Multifractal Analysismentioning

confidence: 99%

Multifractal Scaling characteristics of lineament networks of a fractured sandstone aquifer system

Abdi,

Chettih

2024

Earth Sci Inform

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“…It consists of Triassic gypsum and salt-rich clays, with local doleritic volcanic rocks, overlaid by Jurassic carbonates, marlstones and sandstone-siltstone alternations. The Lower Cretaceous is characterised by limestones and sandstones-silstones rich in gypsum and claystones, whereas the Upper Cretaceous is constituted by dolomitic limestones, gypsum-rich marls and marly-limestone alternations (Guillemot & Estorges, 1981;Abed, 1982;Kazi-Tani, 1986;Bracene, 2001;Bettahar, 2009;Zazoun et al, 2015). The Cenozoic is represented mainly by continental siliciclastic deposits.…”

Section: Amour Mountains (Central Saharan Atlas)mentioning

confidence: 99%

Ostrácodos del tránsito Cenomaniense-Turoniense en los Montes Ksour y Amour (Atlas Sahariano): sistemática e implicaciones paleobiogeográficas

Benadla¹,

Marok²,

Soulimane³

et al. 2023

estudgeol

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El estudio de los ostrácodos de la transición Cenomaniense-Turoniense (Cretácico superior) en los Montes Ksour y Monte Amour (Atlas Sahariano, Argelia) ha permitido la identificación de asociaciones fósiles típicas de este periodo caracterizado por cambios ambientales a escala global. La asociacion de ostrácodos consiste en 15 especies y 7 géneros, y se encuentra dominada por la familia Cytherellidae (principalmente el género Cytherella), y en menor medida por las familias Paracyprididae (exclusivamente Paracypris) y Trachyleberididae (principalmente Cythereis). Las formas menos comunes corresponden a las familias Bairdiidae, Bythocypridae y Macrocyprididae. Las asociaciones de ostrácodos del Atlas Sahariano fueron comparadas con las asociaciones de cuencas vecinas pertenecientes a la provincia paleobiogeográfica del Norte de África y Oriente Medio (margen septentrional de Gondwana) con el fin de encontrar similitudes entre cuencas. Así, el resultado obtenido muestra una gran similitud entre la fauna de ostrácodos de las cuencas del Atlas Sahariano en Argelia y Túnez. Por otro lado, existe similaridad entre las asociaciones de las cuencas de Marruecos y Egipto, y de ambas a su vez con las cuencas de Oriente Medio (Jordán y Omán). Finalmente, la fauna de la Cuenca Libanesa aparece relativamente aislada. Estas similaridades entre distintas cuencas desde el punto de vista palaeobiogeográfico pueden evidenciar cierta comunicación entre las mismas o condiciones ambientales equivalentes durante el tránsito Cenomaniense-Turoniense.

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Moho depth derived from gravity and magnetic data in the Southern Atlas Flexure (Algeria)

Meliani

Bourmatte

Hamoudi

et al. 2016

Journal of African Earth Sciences

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La fracturation et les bandes de déformation dans la région d’El Kohol (Atlas saharien central, Algérie): analyse fractale, lois d’échelles et modèle de réseaux de fractures discrètes

Cited by 4 publications

References 38 publications

Multifractal Scaling characteristics of lineament networks of a fractured sandstone aquifer system

Multifractal Scaling characteristics of lineament networks of a fractured sandstone aquifer system

Ostrácodos del tránsito Cenomaniense-Turoniense en los Montes Ksour y Amour (Atlas Sahariano): sistemática e implicaciones paleobiogeográficas

Moho depth derived from gravity and magnetic data in the Southern Atlas Flexure (Algeria)

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