Géochimie et signification géotectonique des volcanites du Cryogénien inférieur du Saghro (Anti-Atlas oriental, Maroc) / Geochemistry and geotectonic significance of Early Cryogenian volcanics of Saghro (Eastern Anti-Atlas, Morocco)

Fekkak, Abdelilah; Pouclet, André; Ouguir, Hassane; Ouazzani, Hassane; Badra, Lakhlifi; Gasquet, Dominique

doi:10.1080/09853111.2001.10510730

Cited by 7 publications

(8 citation statements)

References 24 publications

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“…This massif forms part of the 680-580 Ma Pan African Anti-Atlas orogenic belt, north of the West African Craton margin (Ennih and Liégeois 2001). Regional and local geology of the district have been extensively investigated over the past several decades, resulting in a wealth of scientific information including geological maps at different scales, university theses, research papers, and unpublished mining company reports (Leistel and Qadrouci 1991;Pašava 1994;Ouguir et al 1996 ;Baroudi et al 1999;Levresse 2001;Fekkak et al 2001;Cheilletz et al 2002;Levresse et al 2004;Gasquet et al 2005;Tuduri et al 2005). Accordingly, only a summary relevant to the present synthesis is given below.…”

Section: District Geologymentioning

confidence: 98%

Degassing as the Main Ore-Forming Process at the Giant Imiter Ag–Hg Vein Deposit in the Anti-Atlas Mountains, Morocco

Levresse

Bouabdellah

Cheilletz

et al. 2016

Mineral Deposits of North Africa

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Section: District Geologymentioning

confidence: 98%

Degassing as the Main Ore-Forming Process at the Giant Imiter Ag–Hg Vein Deposit in the Anti-Atlas Mountains, Morocco

Levresse

Bouabdellah

Cheilletz

et al. 2016

Mineral Deposits of North Africa

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“…Various studies conducted on the Anti-Atlas (Leblanc and Lancelot, 1980;Leblanc and Moussine-Pouchkine, 1994;Villeneuve and Cornée, 1994;Ennih and Liégeois, 2001;Fekkak et al, 2001;Piqué, 2003;Gasquet et al, 2005) suggest that the Pan-African orogenesis led to the formation of the Anti-Atlasic belt through a three-stage process. The West African Craton was rifted and ruptured during the rst stage (800 − 690 Ma).…”

Section: Geological Settingmentioning

confidence: 99%

Structural features of the South-East of the Saghro inlier (Eastern Anti-Atlas, Morocco): Insights from aeromagnetic data

Aafir

Hahou

Ousaid

et al. 2023

Preprint

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The Anti-Atlas fold and thrust belt is considered an important metallogenic province on the northern margin of the West African Craton (WAC). This structural domain is mainly controlled by structural features inherited from many orogeneses that underwent evolution from the Paleoproterozoic onward. Geophysical investigation is considered an effective tool for studying fracturing and establishing structural maps of sedimentary basins and inaccessible area. The Saghro massif of the Eastern Anti-Atlas is a large Precambrian inlier including the highest peak in the range, Jbel Mansour, reaching 2600 meters, along with many other inaccessible areas. In this work, we highlight the use of airborne magnetic data in the South-East part of the Saghro inlier to depict the tectonic framework and to establish the structural map of this part of the Pan African belt. We particularly focused on determining the local structures and tectonic units by applying many derivatives filters on the magnetic data reduced to pole. The superposition of all magnetic lineaments obtained from various edge detection techniques. The results outline directions that are the same as the general tectonic structures of the area. NE-SW and E-W directions corresponding mainly to Hercynian faults, while the NW-SE to ESE-WNW directions are related to the late Pan-African phase. The interpreted magnetic lineament maps identified new profound faults in this region, in addition to confirming other linear structures already highlighted by previous geophysical investigations. Our synthetic structural map of magnetic lineaments serves as a framework for future mining exploration.

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“…The youngest folded series within the Panafrican inliers, namely the Saghro, BouSalda, and Tiddiline Groups, primarily consist of mafic to intermediate metavolcanic and metasedimentary rocks (Thomas et al, 2004). These units have been assigned either Cryogenian age (Ouguir et al, 1996;Fekkak et al, 2001;Gasquet et al, 2005;Massironi et al, 2008) or Ediacaran age (Liégeois et al, 2006;Abati et al, 2010;Hefferan et al, 2012;Michard et al, 2017). The volcanic series of the Ediacaran OG, accompanied by associated volcanoclastic, sub-volcanic, and plutonic rocks, are widely distributed throughout the majority of the Anti-Atlas region.…”

Section: Geological Framework Anti Atlasmentioning

confidence: 99%

“…The SG, which constitutes the oldest rock formations in the eastern Anti-Atlas belt, extends from the Siroua to the Saghro and Ougnat massifs (Michard et al, 2017). This group primarily consists of metaturbidites that have undergone minor deformation and metamorphism in the greenschist facies, along with mafic to intermediate metavolcanic rocks (Hindermeyer, 1953;Ouguir et al, 1996;Fekkak et al, 2001). These rocks are distributed across various sub-inliers within the Imiter, Boumalne, Qal'atM'gouna, and Sidi Flah areas.…”

Section: Imiter Inliermentioning

confidence: 99%

Mineral Exploration in the Vicinity of the Late Ediacaran Bouteglimtaplite and Pegmatite Dikes Inimiter Inlier Using Aster Data: Preliminary Results

Ousbih,

Askkour

et al. 2023

IJAR

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In the southern part of the Imiter inlier, the early Ediacaran basement of the Saghro Group is crosscut by an important swarm of aplitic and pegmatitic dikes that display an extension of several meters and which can exceed 10 in thickness. They are distributed according to two main directions: NE-SW and NW-SE. Petrographic analysis reveals that the pegmatites and aplite primarily consist of quartz, plagioclase, K-feldspar, muscovite, biotite, allanite, and sphene. The BouTeglimt pegmatites, related to the large BouTeglimt granitic and granodioritic plutons, are exterior pegmatites type, hosted in the metamorphic country rocks. Pegmatite zoning is recognized at two scales: internal zoning, representing variations in mineralogy and texture within individual pegmatite bodies, and regional zoning, characterized by increased mineralogical complexity with distance from the granitic source. Using the ASTER sensor, the study investigated significant clayey, phyllitic, and propylitic alterations of the pegmatites, aplite, and their host rocks in the Imiter mine area. Field investigations and mineralogical characterization highlight four new mineralized zones in base and precious metals. These zones are commonly situated at the peripheries of granites or at the contact between the SG series and the late Ediacaran rocks of the Ouarzazate Group. The mineralization is observed in steeply-dipping veins along major E-W faults parallel to the Imiter fault, as well as in stockwork ore within tuffs, lapilli tuff, rhyolite, and disseminated mineralization within various Ouarzazate Group pyroclastic rocks. The ore mineralogy comprises sulfides and oxide minerals. Furthermore, the muscovite-rich BouTeglimt pegmatite and aplite can be considered an excellent exploration indicators due to their occurrence in fertile granites and rare-element pegmatites. They may hold potential as indicators of tantalum mineralization.

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Géochimie et signification géotectonique des volcanites du Cryogénien inférieur du Saghro (Anti-Atlas oriental, Maroc) / Geochemistry and geotectonic significance of Early Cryogenian volcanics of Saghro (Eastern Anti-Atlas, Morocco)

Cited by 7 publications

References 24 publications

Degassing as the Main Ore-Forming Process at the Giant Imiter Ag–Hg Vein Deposit in the Anti-Atlas Mountains, Morocco

Degassing as the Main Ore-Forming Process at the Giant Imiter Ag–Hg Vein Deposit in the Anti-Atlas Mountains, Morocco

Structural features of the South-East of the Saghro inlier (Eastern Anti-Atlas, Morocco): Insights from aeromagnetic data

Mineral Exploration in the Vicinity of the Late Ediacaran Bouteglimtaplite and Pegmatite Dikes Inimiter Inlier Using Aster Data: Preliminary Results

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