Iron oxide copper-gold (IOCG) mineralization at the Imiter inlier, Eastern Anti-Atlas, Morocco

Baidada, Bouchra; Alansari, Abdelkhalek; Zoheir, Basem; Ilmen, Said; Soulaı̈mani, Abderrahmane; Ikenne, Moha

doi:10.1016/j.chemer.2018.10.002

Cited by 3 publications

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“…. ) are younger than previously reported, as indicated by late Ediacaran age using the "zircon U-Pb" method [26,71,79]. On the other hand, the Saghro Group has a maximum depositional age of about 620-610 Ma based on detrital zircon geochronology [26,73,74].…”

Section: Discussionmentioning

confidence: 83%

“…Among other thing, this assignment is based on the imprecise ages of the various Imiter plutons traversing the Imiter Saghro Group (K/Ar method, [101]. Recent geological studies dedicated to the Imiter area reveal precise ages of the associated igneous rocks and discuss the tectonic setting of the Saghro Group [25,26,71,79]. First, most of the Imiter granitoids (Igoudrane, Bou Teglimt, .…”

Section: Discussionmentioning

confidence: 99%

“…Over most of the largest part of the Saghro massif, the Saghro Group metasediments are unconformably covered by volcanic and volcaniclastic rocks of the late Ediacaran Ouarzazate Group (575-546 Ma) begins by a polygenic conglomerate. The Ouarzazate Group has a wide variety of mafic, intermediate, and felsic dikes (dolerite, andesite, andesitic basalt, and rhyolite), and plutonic rocks with highly potassic calc-alkaline affinity, dating from 582 to 543 Ma (i.e., Taouazzak granodiorite) [17][18][19][20][21][22][23][24]40,71,[77][78][79]. Around the Saghro massif, the Ouarzazate Group is overlain with a more or less obvious angular unconformity by Tata and Taroudant Groups deposits [24,51], marking the beginning of the Paleozoic transgressive cycle [52][53][54].…”

Section: The Saghro Massif and Imiter Inliermentioning

confidence: 99%

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Structural Analysis and Paleostress Evolution in the Imiter Silver Mining Region, Eastern Anti Atlas, Morocco: Implications for Mineral Exploration

et al. 2022

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Development and concentration of many ore deposits at the regional and district scales closely depend on structural geology, especially in polydeformed basements. The superposition of many deformation periods highlights the complexity of the structural context and expected potential location of mineralization zones. The formation and concentration of hydrothermal ore deposits is highly dependent on structural controls. On the NE flank of the Saghro massif (Eastern Anti-Atlas, Morocco), the Imiter silver mining region has been affected by multiple tectonic events since the Precambrian and throughout the Phanerozoic. In this investigation, a structural analysis of the different geological units revealed multi-stage deformation, beginning with the late Pan-African-Cadomian event, and ending with the last Cenozoic exhumation of the area. At least eight tectonic regimes have been identified. The Imiter basement, formed by the Cryogenian-early Ediacaran “flysch-like” Saghro Group, has been folded in low-grade metamorphic conditions, followed by an ENE-WSW brittle compressive event. These deformations occurred before to the early Ediacaran during the compressional and/or transpressional late Pan-African-Cadomian events (600–580 Ma). The unconformably overlaying deposition of the late Ediacaran Ouarzazate Group takes place in a WNW-ESE extensional setting and then involved in a NNW-SSE compressional event that occurred concurrently with a regional exhumation and erosion stages. A similar extensional event appears to have controlled the middle Cambrian sedimentation, the oldest Paleozoic deposits in this area. During the late Carboniferous, Variscan shortening was recorded by NW-SE transpressional deformation responsible for combined dextral strike-slip and southward thrusts. The Imiter silver mining region is part of the Moroccan Sub-Meseta Zone along with Paleozoic inliers of the Skoura and Tamlelt on the southern side of the High Atlas. The Mesozoic evolution began with the Late Triassic NNW-SSW transtensional tectonic regime with a northeast trending CAMP (Central Atlantic Magmatic Province) dyke during the Pangea breakup. Ultimately, the Imiter silver mining region experienced NNW-SSE Atlasic shortening during the uplift of the adjacent High Atlas. Over time, the direction of implemented tectonic stress and its effect on various geological units can elucidate the relationship between tectonism and hydrothermal silver mineralization in the Imiter region. In conclusion, structural analysis and investigation of paleostress development can be one of the most important factors for successful exploration plan and resource recovery in the Imiter region. An analysis of geological structures in determining feasible mineralization zones is crucial for future safe mining operation in the study area and can be extrapolated to other ore mining regions.

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