 |
 |
We also have a jadeite standard supplied to us by George Harlow from AMNH in New York. It comes from Costa Rica or Guatemala, as I recall. We don't normally use it, so I can't tell you much about it. Bob Robert Tracy Professor of Geosciences Associate Department Head Director, Museum of Geosciences Virginia Tech Blacksburg VA 24061-0420 O: 540-231-5980 F: 540-231-3386 On Jan 24, 2016, at 2:58 PM, Bruce Yardley wrote: > 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