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Dear Colleagues, In the late 1970's I analyzed in Cambridge more than 360 sodic pyroxenes from 40 odd blueschist samples using the microprobe, and quite a few from blueschists and eclogites since then. There was no detectable sodium loss. Aral Alinti Bruce Yardley <[log in to unmask]> > Howard > > I seem to recall that Bernard Evans used to have a jadeite standard > for Na when I was learning microprobery from him in the mid 70s. I'm > afraid I don't have any remaining records of how well it performed > however! > > Bruce > > > Bruce Yardley > Emeritus Professor > School of Earth and Environment > University of Leeds > Leeds LS2 9JT > UK > > Tel: +44 (0)7745 132560 > > -----Original Message----- > From: Metamorphic Studies Group > [mailto:[log in to unmask]] On Behalf Of day > Sent: 24 January 2016 03:08 > To: [log in to unmask] > Subject: [geo-metamorphism] Na loss in pyroxene > > Colleagues > > Does anyone know of accessible studies of sodium loss (or not) from > omphacitic pyroxene during microprobe analysis? > > Thanks > > Howard > > Howard W. Day, Professor Emeritus > The Dept. Formerly Known as Geology > University of California Davis > One Shields Ave. > Davis CA 95616 -- Prof. Aral I. Okay Eurasia Institute of Earth Sciences and Department of Geology, Istanbul Technical University, Maslak 34469 Istanbul Turkey http://web.itu.edu.tr/~okay/ http://scholar.google.co.uk/citations?user=bG8g-5MAAAAJ&hl=en