Paleostress evolution in the Moroccan African margin from Triassic to Present

Brahim, L. Aït; Chotin, P.; Hinaj, S; Abdelouafi, Abdellah; Adraoui, A.; Nakcha, C; Dhont, Damien; Charroud, Mohammed; Alaoui, F. Sossey; Amrhar, Mostafa; Bouaza, A; Tabyaoui, H.; Chaouni, Abdel-Ali

doi:10.1016/s0040-1951(02)00368-2

Cited by 135 publications

(79 citation statements)

References 23 publications

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“…All these geological trends are seen on the electrical sections. These two tectonic phases were previously described in Morocco and belong to a main lower Triassic event [16][17][18][19].…”

Section: Interpretations and Discussionmentioning

confidence: 52%

Geoelectrical Tomography Investigating and Modeling of Fractures Network around Bittit Spring (Middle Atlas, Morocco)

Qarqori

Rouai

Moreau

et al. 2012

International Journal of Geophysics

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Direct current Resistivity (DCR) method was carried out to characterize the hydrogeological connection between the Tabular Middle Atlas (TMA) and the Saïs Basin. The TMA is one of the most important aquifers in northern Morocco that supplies the deep aquifer of the Saïs Basin. Electrical resistivity tomography (ERT) survey was focused on the Bittit area that is one of the most important outlet discharges, and it is representative of the relations between the TMA and the Saïs Basin. The high resolution capabilities of the electrical tomography were used to define the geological draining features in the framework of water paths from the TMA to the karstic springs. The synthetic data were calculated for the similar model expected in field data inversion and inversion result of these synthetic data used as a guide for the interpretation of the inverse data resistivity sections. Joint interpretation of geophysical, geological, structural, and synthetic simulation data allowed identifying a conductive horizontal shallow layer overlying two subvertical families of fractures of NE-SW and NW-SE directions. This result leads to propose hydrological behaviour of water from the Tabular Middle Atlas and the Saïs Basin at the Bittit Spring, which takes into account for both horizontal flows through stratification joints or karst and through subvertical fractures.

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“…All these geological trends are seen on the electrical sections. These two tectonic phases were previously described in Morocco and belong to a main lower Triassic event [16][17][18][19].…”

Section: Interpretations and Discussionmentioning

confidence: 52%

Geoelectrical Tomography Investigating and Modeling of Fractures Network around Bittit Spring (Middle Atlas, Morocco)

Qarqori

Rouai

Moreau

et al. 2012

International Journal of Geophysics

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“…Angelier, 1979Angelier, , 1994Armijo, Carey, & Cisternas, 1982;Marrett & Allmendinger, 1990;Will & Powell, 1991;Yamaji, 2000;Yin & Ranalli, 1993;Žalohar & Vrabec, 2007) were developed for the computer-based inversion of structural data. Because of the robustness in multistage deformed areas (see Angelier et al, 1981;Brahim et al, 2002;Hippolyte & Mann, 2011;Kaymakçı, White, & van Dijk, 2000;Sperner et al, 2003;Vandycke & Bergerat, 2001), we used the Direct Inversion Method (INVD) of Angelier (1990) in this study; however, we refer to Angelier (1994) for a detailed review of the method and to Sperner and Zweigel (2010) and Hippolyte, Bergerat, Gordon, Bellier, and Espurt (2012) for data acquisition and separation techniques. Briefly, the INVD is based on the reduced stress tensor concept and the estimation of the stress ellipsoid by the shape factor (Φ), which varies between 0 and 1.…”

Section: Paleostress Analysis Of Fault-slip Datamentioning

confidence: 99%

Kinematic analysis and palaeoseismology of the Edremit Fault Zone: evidence for past earthquakes in the southern branch of the North Anatolian Fault Zone, Biga Peninsula, NW Turkey

et al. 2016

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The Edremit Fault Zone (EFZ) forms one of the southern segments of the North Anatolian Fault Zone (NAFZ) at the northern margin of the Edremit Gulf (Biga Peninsula, South Marmara Region, Turkey). Stratigraphic, structural and kinematic results indicate that basinward younging of the fault zone, in terms of a rolling-hinge mechanism, has resulted in at least three discrete Miocene to Holocene deformational phases: the oldest one (Phase 1) directly related to the inactive Kazdağ Detachment Fault, which was formed under N-S trending pure extension; Phase 2 is characterised by a strike-slip stress condition, probably related to the progression of the NAFZ towards the Edremit area in the PlioQuaternary; and Phase 3 is represented by the high-angle normal faulting, which is directly interrelated with the last movement of the EFZ. Our palaeoseismic studies on the EFZ revealed the occurrence of three past surface rupture events; the first one occurred before 13178 BC, a penultimate event that may correspond to either the 160 AD or 253 AD historical earthquakes, and the youngest one can be associated with the 6 October 1944 earthquake (M w = 6.8). These palaeoseismic data indicate that there is no systematic earthquake recurrence period on the EFZ.

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“…According to the classification made by Varnes [8], the type of landslides movement encounter in our case study were rock falls, and translational and rotational slides. A landslide inventory map was prepared by mapping the landslide locations in Mazari [9] using interpretation of aerial photographs, high resolution satellite imagery, previous reports and extensive field surveys [10]. A random partitioning of the training data was carried out in the area of Mazari, 50% of the whole landslides were selected randomly to calibrate the logistic regression analysis and the half remaining was used for validation purposes " Fig.…”

Section: Generation Of Database For Lr Modelmentioning

confidence: 99%

Application Of Logistic Regression Method To Produce Landslide Susceptibility Map: A Case Study Of Tetouan Mazari, Morocco

Brahim

Elmoulat

2018

MATEC Web Conf.

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Abstract. The main purpose of this study is to use logistic regression (RL) model to map landslide susceptibility in and around the area of Tetouan Mazari in the Northern Morocco. Parameters, such as lithology, slope gradient, slope aspect, faults, drainage lines, and hillshade, were considered. Landslide susceptibility map was produced using RL method and then compared and validated. Before the modeling and validation, the observed landslides were separated into two groups. The first group was for training, and the other group was for validation steps. The accuracy of the model was measured by fitting them to a validation set of observed landslides. For validation process, the half landslides remaining was used. The final map was classified into five classes: Very High (32%), High (40%), Medium (7%), Low (7%) and Nil (15%). According to these values logistic regression was determined to be one of the most accurate method to generate landslide susceptibility map. Last but not least, logistic regression model can be used to manage and mitigate hazards related to landslides and to aid in land-use planning for the city of Tetouan..

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Paleostress evolution in the Moroccan African margin from Triassic to Present

Cited by 135 publications

References 23 publications

Geoelectrical Tomography Investigating and Modeling of Fractures Network around Bittit Spring (Middle Atlas, Morocco)

Geoelectrical Tomography Investigating and Modeling of Fractures Network around Bittit Spring (Middle Atlas, Morocco)

Kinematic analysis and palaeoseismology of the Edremit Fault Zone: evidence for past earthquakes in the southern branch of the North Anatolian Fault Zone, Biga Peninsula, NW Turkey

Application Of Logistic Regression Method To Produce Landslide Susceptibility Map: A Case Study Of Tetouan Mazari, Morocco

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