Contribution of the geomagnetism to the region of the massif Jbel Saghro geology, Eastern Anti-Atlas, Morocco

被引:0
作者
Abdelhalim Miftah
Driss El Azzab
Ahmed Attou
Ahmed Manar
机构
[1] University Hassan the First,Geology Applied to Mineral Resources and Energy Research team, Faculty of Sciences and Technology
[2] University of Sidi Mohamed Ben Abdellah,Geo Resources and Environment Research team, Faculty of Sciences and Technology (FST)
[3] Ministry of Energy,undefined
[4] Mines Water and Environment,undefined
来源
Arabian Journal of Geosciences | 2017年 / 10卷
关键词
Jbel Saghro; Precambrian; Aeromagnetic; Magnetic anomaly; Tectonic;
D O I
暂无
中图分类号
学科分类号
摘要
Our investigation relates to the interpretation of the magnetic data of Jbel Saghro, by aeromagnetic processing using Geosoft and ArcGis software. The data were obtained from digitizing the preexisting maps. From the magnetic field anomaly maps, different anomalies were identified with differences in intensities, sizes, and shapes and in being isolated or interfered. The directions are in general ENE-WSW, NNW-SSE, W-E, and NW-SE which are in good agreement with the general tectonic structure of the region. In order to correspond the anomalies to their natural sources and their geometrical configuration, it was necessary to calculate the residual polar. This avoids the presence of two lobes for the same source, what makes it possible to delimit the geological sources laterally. Thus, the attribution of each magnetic anomaly to its geological source becomes possible. Indeed, generally magnetic anomaly of strong intensities and big wavelengths is associated to very magnetized structures related to the Precambrian basement, and the negative a.m. is connected to structures of weak magnetization located in general in the cover. The application of the tilt angle filter allowed the localization of the outcrops of the inliers and new geophysical lineaments. On the other hand, the local maxima of the horizontal gradient made it possible to reveal the large structural features concerning the main tectonic events of the area.
引用
收藏
相关论文
共 65 条
[1]  
Amar M(2012)Apport de la cartographie aéromagnétique à l'identification structurale du système aquifère des sources de l'oasis de Figuig Maroc Bull Inst Sci Rabat Sect Sci Terre 34 29-40
[2]  
Manar A(2013)3D modelling and structural investigation of the central volcanics in Slovakia using magnetic data Carpathian Journal of Earth and Environmental Sciences 8 27-33
[3]  
Boualoul M(1986)Approximating edges of source bodies from magnetic or gravity anomalies Geophysics 51 1494-1498
[4]  
Bektas O(1978)Le volcanisme calcoalcalin Précambrien terminal de l’Anti-Atlas (Maroc) et ses altérations. Interprétations Géodynamiques C R Acad des Sci Paris 287 427-430
[5]  
Buyuksarac A(2007)Investigation into the regional wrench tectonics of Inner East Anatolia (Turkey) using potential field data Phys Earth Planet Inter 160 86-95
[6]  
Rozimant K(1963)Histoire géologique de l’Anti-Atlas de l’archéen à l’aurore des temps primaires Notes Mém Serv Géol Maroc 162 350-352
[7]  
Blakely RJ(1974)Utilisation de la méthode Rb-Sr pour la datation d'une schistosité Des sédiments peu métamorphisés : application au Précambrien II de la boutonnière de Bou Azzer-El Graara (Anti-Atlas, Maroc) Earth Planet Sci Lett 22 404-412
[8]  
Simpson RW(1977)Implications stratigraphiques d'une étude Géochronologique Rb-Sr sur métasédiments précambriens de Bou Azzer (Anti-Atlas, Maroc) Notes Mém Serv Géol Maroc 38 7-12
[9]  
Boyer C(1998)Paléomagnétisme des laves du Moyen Atlas (Maroc): rotations récentes C R Acad Sci Paris 327 509-512
[10]  
Chikhaoui M(1994)Paléomagnétisme des roches ultrabasiques du Rif externe (Maroc) C R Acad Sci Paris 318 351-357