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Tourmaline developed under low-temperature conditions (<~300°C) typically has distinctive morphological and chemical characteristics that reveal significant information about the environments in which they crystallize. Under diagenetic conditions, tourmaline can develop as overgrowths on detrital tourmaline cores or as new, authigenic crystals. Tourmaline, as monopolar crystal overgrowths, is found...
Bodies of magnesite-rich rocks (magnesite±talc±quartz±dolomite), locally containing emerald deposits, occur within the Swat Valley. These rocks, part of the Indus suture mélange group, are distributed mostly along contacts of serpentinized ultramafic rocks with carbonate±graphite-bearing metasedimentary rocks. Their field association, petrographic details, mineralogical composition and geochemical...
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