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Article

The Açdif Gold-Bearing Shear Zone (Zenaga Inlier, Central Anti-Atlas, Morocco): New Petro-Structural and Geochemical Data

by
Mohammed El Azmi
1,2,
Mohamed Aissa
1,
Azizi Moussaid
1,
Said Ilmen
3,
Hafid Mezougane
1,4,*,
Ilya Prokopyev
5,
Ilyasse Loudaoued
1,
Muhammad Souiri
2,
Hassane Ouguir
1,
Mohammed Aarab
1,
Mohamed Zouhair
2,
Lhou Maacha
2 and
Safouane Admou
2
1
Laboratory of Mineral and Energy Resources Studies (LERME), Faculty of Sciences, Moulay Ismail University, M.B. 11201, Zitoune, Meknès 50070, Morocco
2
Managem Group, Twin Center, Tour A, Angle Boulevards Zerktouni et Al Massira Al Khadra, BP 5199, Casablanca 20000, Morocco
3
CAG2M, Polydisciplinary Faculty of Ouarzazate, Ibnou Zohr University, Avenue Moulay Ettahar Ben Abdulkarim, BP. 638, Ouarzazate 45000, Morocco
4
Physico-Chemistry of Processes and Materials Laboratory, Research Team Geology of the Mining and Energetics Resources, Faculty of Sciences and Techniques, Hassan First University of Settat, Settat 26002, Morocco
5
Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 3 Academician Koptyug Ave, Novosibirsk 630090, Russia
*
Author to whom correspondence should be addressed.
Minerals 2023, 13(9), 1116; https://doi.org/10.3390/min13091116
Submission received: 20 June 2023 / Revised: 23 July 2023 / Accepted: 8 August 2023 / Published: 24 August 2023
(This article belongs to the Section Mineral Geochemistry and Geochronology)
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Abstract

The Açdif gold deposit is located in the Zenaga Inlier (central Anti-Atlas), approximately 120 km southwest of the city of Ouarzazate. It hosts gold mineralization associated with a shear zone affecting the metamorphic and magmatic formations of the Eburnean basement. It mainly consists of alternating micaschists, augen gneisses, and orthogneiss. These crystalline rock assemblages are intruded by a variety of granitoids. These are the Azguemerzi granitoids, which are locally affected by Eburnean deformation. Subsequently, these facies are intersected by a swarm of mafic dykes, which show a variety of rocks ranging from microgabbro-dolerite to quartz diorite. Detailed mapping, petro-mineralogical investigations, and geochemistry of the major and trace elements of these magmatic intrusions suggests the following: (i) for the granodiorite rocks (deposited before the basic dykes), a calc-alkaline affinity, with a chemical signature similar to a syn-collisional context; (ii) for mafic dykes, a contemporaneous emplacement of these mafic intrusions with an evolutionary process controlled by fractional crystallization of the same magma of continental tholeiites, whose chemical composition is comparable to that of enriched MORBs (EMORBs). These continental tholeiites are related to a distensive tectonic context that would have affected the Zenaga inlier prior to the Pan-African orogeny.
Keywords: granitoids; mafic dyke; continental tholeiites; Açdif; Zenaga; Anti-Atlas; Morocco granitoids; mafic dyke; continental tholeiites; Açdif; Zenaga; Anti-Atlas; Morocco

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MDPI and ACS Style

El Azmi, M.; Aissa, M.; Moussaid, A.; Ilmen, S.; Mezougane, H.; Prokopyev, I.; Loudaoued, I.; Souiri, M.; Ouguir, H.; Aarab, M.; et al. The Açdif Gold-Bearing Shear Zone (Zenaga Inlier, Central Anti-Atlas, Morocco): New Petro-Structural and Geochemical Data. Minerals 2023, 13, 1116. https://doi.org/10.3390/min13091116

AMA Style

El Azmi M, Aissa M, Moussaid A, Ilmen S, Mezougane H, Prokopyev I, Loudaoued I, Souiri M, Ouguir H, Aarab M, et al. The Açdif Gold-Bearing Shear Zone (Zenaga Inlier, Central Anti-Atlas, Morocco): New Petro-Structural and Geochemical Data. Minerals. 2023; 13(9):1116. https://doi.org/10.3390/min13091116

Chicago/Turabian Style

El Azmi, Mohammed, Mohamed Aissa, Azizi Moussaid, Said Ilmen, Hafid Mezougane, Ilya Prokopyev, Ilyasse Loudaoued, Muhammad Souiri, Hassane Ouguir, Mohammed Aarab, and et al. 2023. "The Açdif Gold-Bearing Shear Zone (Zenaga Inlier, Central Anti-Atlas, Morocco): New Petro-Structural and Geochemical Data" Minerals 13, no. 9: 1116. https://doi.org/10.3390/min13091116

APA Style

El Azmi, M., Aissa, M., Moussaid, A., Ilmen, S., Mezougane, H., Prokopyev, I., Loudaoued, I., Souiri, M., Ouguir, H., Aarab, M., Zouhair, M., Maacha, L., & Admou, S. (2023). The Açdif Gold-Bearing Shear Zone (Zenaga Inlier, Central Anti-Atlas, Morocco): New Petro-Structural and Geochemical Data. Minerals, 13(9), 1116. https://doi.org/10.3390/min13091116

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