“…12 ). The absorption bands seen in the spectra of these rocks are typically those of alteration products or other substitutions, rather than those of the primary association [ 87 ]. Fig.…”
“…12 ). The absorption bands seen in the spectra of these rocks are typically those of alteration products or other substitutions, rather than those of the primary association [ 87 ]. Fig.…”
“…15 Quartz, Muscovite, Feldspar, Tourmaline (apatite, zircon) 1-5 cm SBO. 16 Quartz, Feldspar, Muscovite, Tourmaline (apatite, zircon) 2-4.5 cm SBO.17…”
Section: Methodsmentioning
confidence: 99%
“…In Morocco, the granitic pegmatites hosted in Precambrian terrains are relatively the most studied [8][9][10][11][12][13][14][15][16][17]. The research on Variscan pegmatites, particularly those of the Jebilet Massif, dates back to some decades ago [18][19][20][21][22][23].…”
The Sidi Bou Othmane (SBO) pegmatite district is situated in the Central Jebilet massif, Western Meseta domain, Morocco. The SBO district is hosted essentially in a volcano-sedimentary series composed of Late-Devonian Sarhlef shales. Pegmatite bodies crop out as dykes, which are oriented from N-S to E-W and are generally variably deformed with ductile and/or brittle structures with ante, syn- or post-kinematic criteria. Petrographic observations of pegmatite dykes show that feldspars (i.e., albite, microcline) are the most abundant mineral phases, followed by quartz and micas, with tourmaline and accessory minerals such as garnet, and zircon also featuring heavily, as well as secondary minerals such as clinochlore, sericite, and illite. The geochemical study of the SBO pegmatites indicates that they have mainly S-type granitic compositions, which are peraluminous granites with calc-alkalic affinities. The study of trace elements indicates that SBO pegmatites were formed in post-orogenic syn-collision context during the Variscan orogeny by the partial melting of argilliferous sediment. They can be ascribed to the muscovite-bearing pegmatite; moreover, they have good potential regarding ceramics. They also contain minerals, such as feldspar, which have been recently assessed as critical raw materials by the European Union.
“…In Morocco, granitic pegmatites hosted in Precambrian terrains are relatively the most studied [8,9,10,11,12,13,14,15,16,17]. The few works conducted on Variscan pegmatites and more precisely on those ones of the Jebilet Massif dates to some decades ago [18,19,20,21,22,23] and mainly deal with the crystallography of the phosphatic mineral phases occurring within these pegmatite rocks; moreover, these works have shown the presence of frequent monocrystalline ferrisicklerite nodules in the veins of SBO pegmatite (Jebilet Massif).…”
The Sidi Bou Othmane (SBO) pegmatite district is in the Central Jebilet massif, Occidental Meseta domain, Morocco. The SBO district is hosted essentially in a volcano-sedimentary series composed of the Late-Devonian Sarhlef shales. Pegmatite bodies crop out as dykes, which are oriented from N-S to E-W and are generally variably deformed with ductile and/or brittle structures with ante, syn- or post kinematic criteria. Petrographic observations of pegmatite dykes show that feldspars (i.e., albite, microcline) are the most abundant mineral phases, followed by quartz, micas, with tourmaline and accessory mineral as garnet, and zircon and secondary minerals as clinochlore, sericite, and illite. The geochemical study indicates that, according to the major pegmatite elements dykes of SBO have mainly a S-type granitic composition and are peraluminous granite with calc-alkalic affinity. The study of trace elements pointed out that SBO pegmatite formed under post-orogenic syn-collision context during the Variscan orogeny, by the partial melting of argilliferous sediment and can be ascribed to the muscovite-bearing pegmatite; moreover, they have a good potential on ceramic and contain minerals, such as feldspar, recently assessed as Critical raw materials by European Union.
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