Orthopyroxenite outcrop, Laouni, Ahaggar Mtn (Hoggar Mtn), Tamanghasset Province, Algeria
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The crystallization of orthoamphibole-garnet, and at a later stage, of chlorite, is due to retrogression with hydration at 650-700ºC/3kb. This regional hydration is related with the release of fluids during the crystallization of the Pan-African granitic and mafic magmas of the Laouni area.
5 entries listed. 2 valid minerals.
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