Abstract
The Precambrian Zenaga inlier, which is located in the central Moroccan Anti-Atlas, contains a series of dikes and pegmatitic lenses that are mostly hosted in mica schist and the Taznakht granite. They have provided large quantities of beryl and muscovite and were distinguished by the presence of columbite-tantalite and several phosphate species.The investigated pegmatites are characterized by an abundance of quartz, muscovite, feldspars, tourmaline, and beryl and by the presence of accessory minerals such as apatite, zircon, sphene, and garnet. Their global geochemical characteristics show that they are derived from a fertile, peraluminous granite, which is an S-type granite with a calc-alkaline affinity. A petrogenetic relationships between the Taznakht granite and the pegmatites of Zenaga has been supported through (K/Rb) vs. Cs and (K/Cs) vs. Ta diagrams. These pegmatites are the result of moderate degrees of fractionation, with a slight enrichment in rare elements. The results obtained also allowed us to classify these pegmatites as lithium-cesium-tantalum-rich rare element pegmatites (REL-LCTs).
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