gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1982.045.337.08 Paragonite Paragenesis from the Garnet Granulites of the Jijal Complex, Kohistan, N. Pakistan Jan M. Q. Department of Geology, University of Peshawar, Peshawar, Pakistan Wilson R. N. Windley B. F. Department of Geology, The University, Leicester LE1 7RH, UK 1982 45 337 73 77 Copyright © 1982, The Mineralogical Society 1982 Abstract

Chemistry of six white micas from the high-pressure garnet granulites of Jijal is presented, together with trace elements, refractive indices, and 2Vα for one. The micas are rich in the paragonite component (over 93%), with one analysis having the highest 100 Na/(Na + K) ratio (98.5) so far reported. The paragonite is not a stable mineral of the granulites but was over-printed on the granulites at about 505–540 °C and 8–9 kbar (suggesting a depth of 30 km).