A Preliminary Study of the Graphite-Bearing Rocks, at Patlepani-Mohriwali Area, Muzaffarabad, A.K
Abstract
Graphite at Patlepani-Mohriwali area, District Muzaffarabad (A.K.) occurs in a skarn formed due to an intrusion of pegmatite in recrystallized limestone of Salkhala Series of Pre-Cambrian age. Skarn formed at the upper contact of pegmatite, devoid of graphite, is barren skarn, whereas, at lower contact is fully mineralised with graphite. Mineralised skarn show a well defined zonation pattern from pegmatite to amphibole-pyroxene- graphite skarn to pyroxene-amphibole-graphite skarn to plagioclase- garnet-graphite skarn.
Graphite has an average concentration of 12% and occurs in skarn as concordent lenses, disseminated flakes, bands and is formed in two phases; organic carbon present in original impure limestone was converted into amorphous to semi crystalline graphite during regional metamorphism of area. During the subsequent process of skarnification, this amorphous to semi-crystalline graphite was fully crystallised and being mobile migrated into low pressure zones of skarn.
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