Sur les mecanismes de formation des chaines intracontinentales; l'exemple des chaines atlasiques du Maroc

Mattauer, Maurice; Tapponnier, Paul; Proust, F.

doi:10.2113/gssgfbull.s7-xix.3.521

Cited by 256 publications

(189 citation statements)

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“…-The major directions NE-SW to ENE-WSW and NS distributed in the Beni Mellal Atlas (southern sector) bear witness to the importance of the structural heritage [87,88,89,90] noticed by several authors [4,40,91,92]. These directional peaks characterize the Atlas chain evolution during Mesozoic and Cenozoic periods [81][82][83][84][85][86][87][88][89][90][91][92][93].The direction NE-SW to ENE-WSW is parallel to the Atlas chain structural direction [39] and also to the Tadla basin lengthening.…”

Section: Fig6 Flowchart Of Adopted Methodology For Lineaments Extramentioning

confidence: 99%

Contribution of gravity data and Sentinel-1 image for structural mapping. Case of Beni Mellal Atlas and Beni Moussa plain (Morocco).

et al. 2018

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Abstract. The present work is a combined study of gravity and Sentine-1 data for fracture mapping in the karstic massif of Beni Mellal Atlas and the adjacent plain of Beni Moussa. In order to locate the various faults that contribute to the study area structuring, the gravimetric contacts analysis method, based on the joint use of the horizontal gradient and the upward continuation at different altitudes, has been applied to the gravity data. To optimize the structural mapping in the study area, the gravimetric lineaments obtained were completed and correlated with the lineaments got from Sentinel-1 image. Four faults families of NE-SW; E-O; N-S and NW-SE directions have been highlighted. There fault families are perfectly combined with the studied area's surface water network, moreover, they corroborate with the previous geological and structural studies.

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Section: Fig6 Flowchart Of Adopted Methodology For Lineaments Extramentioning

confidence: 99%

Contribution of gravity data and Sentinel-1 image for structural mapping. Case of Beni Mellal Atlas and Beni Moussa plain (Morocco).

et al. 2018

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“…The High Atlas is a typical intracontinental chain (CHOUBERT & FAURE- MURET 1962MICHARD 1976Mattauer et al 1977Souhel 1996. This fact is reflected in particular by the lack of ophiolites of flysch, a strong regional metamorphism, and granitoid (Jacobshagen 1986).…”

Section: Structural Evolution Of the Central High Atlasmentioning

confidence: 99%

“…The Hercynian substratum is often masked by a Mesozoic or Cenozoic discordant coverage. Polyphase compression (Mattauer 1977) has affected most of the Mesozoic series and the ante-Mesozoic basement, leading to folds, reverse faults and discontinuities from the Cretaceous.The uprising of the High Atlas is the result of a structural inversion from the Cretaceous and Cenozoic, during which the post-Hercynian folded cover was peeled off and the Triassic detrital. Because of these deformations, the High Atlas is crisscrossed by broad synclines flat bottom, filled with thick Jurassic and Cretaceous series, which are often heavily eroded.…”

Section: Structural Evolution Of the Central High Atlasmentioning

confidence: 99%

Geological Survey, Gitology, and Geophysical of Deposit Tighmart (High Atlas Demnat)

Wafik¹,

Najine²,

Zakaria³

et al. 2017

ESJ

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The copper site Tighmart, study area is located about 27 km NNE of the city of Demnate in the Central High Atlas. On a stand dominated by Devonian shales and sandstones with limestone benches centimeter, rests a cover Triassic (sandstone, red clay with discontinuous basalt flows) and Jurassic (Lias carbonate bars, based on consistent training gypsiferous lower Lias). The set is structured faulted anticline and eroded. Electrical tomography has been used in order to characterize the structural elements that can promote the introduction of the copper, and the mineral density. This mineralization is concentrated locally in metric nodes, formed by the junction of the N70 ° faults and N40 °. This is very crushed zones decametric extension and where there is a large concentration of chalcocite associated with malachite and azurite rarely. In general, two areas have been identified on both sides of the old gallery: -The southern part crossed by the thalweg shows the dolerite attributed resistant levels through which the levels of oxides and hydroxides of iron and aluminum at depths of 8 to 13 m. This part of the sector does not really present significant reserves given that no continuity was confirmed. -The northern part of a very rugged topography presents no surface mineralization index. However, electrical tomography profiles in this sector show large anomalous beaches right pockets found in the gallery. The examination of the values of apparent resistivity advocates appearing mineralization from 23 m deep.

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“…These young mountains were uplifted during the Cenozoic as a result of the Alpine orogeny, such as the Rif Mountains to the north. However, the High and Middle Atlas thrust-fold belts were created by the tectonic inversion of pre-existing extensional basins of Triassic-Jurassic age [4], [5], [21]- [27]. Compared to the Alpine-type, collisional Rif belt, the Atlas system is an intracontinental, autochthonous system, developed over a continental crust, which was only slightly thinned during its pre-orogeny evolution.…”

Section: Geological Settingmentioning

confidence: 99%

New numerical and theoretical model to characterize the upper crustal structure of the Moroccan atlas from wide-angle seismic reflection data

Ouraini¹,

Gueraoui²,

Ayarza³

et al. 2015

ces

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Sur les mecanismes de formation des chaines intracontinentales; l'exemple des chaines atlasiques du Maroc

Cited by 256 publications

References 0 publications

Contribution of gravity data and Sentinel-1 image for structural mapping. Case of Beni Mellal Atlas and Beni Moussa plain (Morocco).

Contribution of gravity data and Sentinel-1 image for structural mapping. Case of Beni Mellal Atlas and Beni Moussa plain (Morocco).

Geological Survey, Gitology, and Geophysical of Deposit Tighmart (High Atlas Demnat)

New numerical and theoretical model to characterize the upper crustal structure of the Moroccan atlas from wide-angle seismic reflection data

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