Mapping and characterization from aeromagnetic data of the Foum Zguid dolerite Dyke (Anti-Atlas, Morocco) a member of the Central Atlantic Magmatic Province (CAMP)

Bouiflane, Mustapha; Manar, Ahmed; Medina, F.; Youbi, Nasrrddine; Rimi, Abdelkrim

doi:10.1016/j.tecto.2017.04.023

Cited by 16 publications

(4 citation statements)

References 51 publications

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“…The kinematic of these faults was related to the tectonic phase D1 reported from [9] which took place during the Triassic rifting of Pangea, and to an Early-Middle Jurassic transtensional tectonics dated on the basis of fission tracks at 216 ± 11 Ma. This phase was also associated with the emplacement of NE-SW tholeiitic dykes of the Early Jurassic age (e.g., Foum Zguid; [45,46]). Further north of the Saghro inlier, in the Skoura inlier, central High Atlas, a left-lateral movement has been documented in the area during the Triassic time, and these faults are assumed to be controlled by the evolution of Triassic basins in the central High Atlas [47].…”

Section: Tectonic History Of the Ne Edge Of The Saghro Inliermentioning

confidence: 97%

“…In the Middle to Upper Permian, an important magmatism is reported in the Tafilalt area [59] representing an early stage of Triassic rifting that is heralded by the Central Atlantic Magmatic Province (CAMP) during Triassic time. In the Anti-Atlas, the CAMP is represented by sills and dykes mainly mapped in the South of the Saghro inlier [45,46]. This magmatism conduct to a noteworthy hydrothermalism that led to several ore deposits stocks, e.g., the Ag-Hg Imiter deposits (Saghro inlier) [40], the Co-Ni-Ag-Au Bou Azzer deposits (Bou Azzer inlier) [34], and the Ba-Fa Ras Elhamda deposits (Ougnat inlier) [43].…”

Section: Phanerozoic Tectono-magmatic-hydrothermal Evolution Of the A...mentioning

confidence: 99%

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Multiscale Structural Analysis of Ediacaran–Cambrian Rocks on the Northeastern Edge of the Saghro Inlier (Eastern Anti-Atlas): Relevance of Post-Cambrian Deformation

Yajioui,

Sant’Ovaia,

Karaoui

et al. 2023

Geosciences

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The Ediacaran–Cambrian rocks on the northeastern edge of the Saghro inlier experienced polycyclic tectono-thermal events, which are reported here based on a multiscale structural analysis, from field measurements to fluid inclusion planes. Three striking populations were identified, cutting across both the Ediacaran and Cambrian formations. These tectonic structures were generated during four tectonic events. (i) E-W-striking structures that host ore mineralized bodies (sulfide, oxide, quartz, and barite). They display a polyphase tectonic history, caused by a dextral movement in response to a NW–SE-oriented shortening, leading to the formation of quartz gashes and veins. This tectonic event took place during the Neovariscan. These E–W-striking structures were subsequently reactivated during the Mesozoic time under a sinistral strike-slip regime as a result of NE–SW shortening syn-kinematic with barite mineralization. (ii) NE–SW-striking strike-slip structures (dextral or sinistral) crosscut the E–W-striking veins. These faults are related to the NW–SE-oriented shortening that occurred during the Neogene. (iii) The last tectonic episode, related to the N–S shortening, took place during the late Neogene to the Quaternary period. It resulted in NW–SE to N–S-striking structures that were related to dextral and sinistral strike-slip movements, which crosscut the preexisting E–W structures.

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Section: Tectonic History Of the Ne Edge Of The Saghro Inliermentioning

confidence: 97%

Section: Phanerozoic Tectono-magmatic-hydrothermal Evolution Of the A...mentioning

confidence: 99%

Multiscale Structural Analysis of Ediacaran–Cambrian Rocks on the Northeastern Edge of the Saghro Inlier (Eastern Anti-Atlas): Relevance of Post-Cambrian Deformation

Yajioui,

Sant’Ovaia,

Karaoui

et al. 2023

Geosciences

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“…Thus, it follows from O'Leary's definition and the current use of the term that lineaments can be identified by photometric methods in topographic, bathymetrical, spectral digital and potential field data (see also [20][21][22]). A lineament data set would commonly include dyke and vein systems, since these commonly display linear structures that are detectable in optical, multispectral and potential field data sets (e.g., [23][24][25]).…”

Section: The Concept Of Lineamentsmentioning

confidence: 99%

The Concept of Lineaments in Geological Structural Analysis; Principles and Methods: A Review Based on Examples from Norway

Gabrielsen,

Olesen

2024

Geomatics

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Application of lineament analysis in structural geology gained renewed interest when remote sensing data and technology became available through dedicated Earth observation satellites like Landsat in 1972. Lineament data have since been widely used in general structural investigations and resource and geohazard studies. The present contribution argues that lineament analysis remains a useful tool in structural geology research both at the regional and local scales. However, the traditional “lineament study” is only one of several methods. It is argued here that structural and lineament remote sensing studies can be separated into four distinct strategies or approaches. The general analyzing approach includes general structural analysis and identification of foliation patterns and composite structural units (mega-units). The general approach is routinely used by most geologists in preparation for field work, and it is argued that at least parts of this should be performed manually by staff who will participate in the field activity. We argue that this approach should be a cyclic process so that the lineament database is continuously revised by the integration of data acquired by field data and supplementary data sets, like geophysical geochronological data. To ensure that general geological (field) knowledge is not neglected, it is our experience that at least a part of this type of analysis should be performed manually. The statistical approach conforms with what most geologists would regard as “lineament analysis” and is based on statistical scrutiny of the available lineament data with the aim of identifying zones of an enhanced (or subdued) lineament density. It would commonly predict the general geometric characteristics and classification of individual lineaments or groups of lineaments. Due to efficiency, capacity, consistency of interpretation methods, interpretation and statistical handling, this interpretative approach may most conveniently be performed through the use of automatized methods, namely by applying algorithms for pattern recognition and machine learning. The focused and dynamic approaches focus on specified lineaments or faults and commonly include a full structural geological analysis and data acquired from field work. It is emphasized that geophysical (potential field) data should be utilized in lineament analysis wherever available in all approaches. Furthermore, great care should be taken in the construction of the database, which should be tailored for this kind of study. The database should have a 3D or even 4D capacity and be object-oriented and designed to absorb different (and even unforeseen) data types on all scales. It should also be designed to interface with shifting modeling tools and other databases. Studies of the Norwegian mainland have utilized most of these strategies in lineament studies on different scales. It is concluded that lineament studies have revealed fracture and fault systems and the geometric relations between them, which would have remained unknown without application of remote sensing data and lineament analysis.

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“…Its lower Jurassic age (Lias), suggests that it was formed during the opening of Tethys. This large dyke is an integral portion of the Central Atlantic Magmatic Province (CAMP) [47,48].…”

Section: Bou Azzer Magnetic Fieldmentioning

confidence: 99%

Gradiometry Processing Techniques for Large-Scale of Aeromagnetic Data for Structural and Mining Implications: The Case Study of Bou Azzer Inlier, Central Anti-Atlas, Morocco

Soulaimani,

Chakiri,

Soulaimani

et al. 2023

Applied Sciences

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Due to its unique geographic and tectonic location, the Bou Azzer inlier has drawn increased interest in mining studies. The inlier’s basement structure remains subject to investigation meanwhile faults and igneous rocks affect the local geology. In order to comprehend the Bou Azzer inlier’s structure, we use aeromagnetic data. The edge enhancement method described in this work is based on the gradiometry tensor analysis (GTA) of aeromagnetic data, which yields estimated magnetic tensors, rotational invariants, horizontal invariants, computed strike lines, and Eigensystems. This study’s primary objective is to use GTA to define structural boundaries in complicated geological and tectonic environments. The vertical and horizontal positions of the geological border’s limits have been determined via analysis of the acquired answers. The borders of the anomalous sources are marked in space by the lowest eigenvalue. According to the research, the inlier demonstrates potential for further mineralization with regard to its complicated structure, which is mostly dominated by WNW-ESE, ENE-WSW, NE-SW and E-W trending lineaments with varying depths between 3.45 and 9.06 km. Certainly, the derived structural scheme has enabled the identification of various formations that may be favorable for the circulation of mineralizing fluids, facilitating the concentration of economically valuable mineral deposits, similar to existing metal reserves in the examined area.

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Mapping and characterization from aeromagnetic data of the Foum Zguid dolerite Dyke (Anti-Atlas, Morocco) a member of the Central Atlantic Magmatic Province (CAMP)

Cited by 16 publications

References 51 publications

Multiscale Structural Analysis of Ediacaran–Cambrian Rocks on the Northeastern Edge of the Saghro Inlier (Eastern Anti-Atlas): Relevance of Post-Cambrian Deformation

Multiscale Structural Analysis of Ediacaran–Cambrian Rocks on the Northeastern Edge of the Saghro Inlier (Eastern Anti-Atlas): Relevance of Post-Cambrian Deformation

The Concept of Lineaments in Geological Structural Analysis; Principles and Methods: A Review Based on Examples from Norway

Gradiometry Processing Techniques for Large-Scale of Aeromagnetic Data for Structural and Mining Implications: The Case Study of Bou Azzer Inlier, Central Anti-Atlas, Morocco

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