New Publication Alert... McDonald et. al 2018

New Paper Alert….

McDonald, C. S.; Regis, D.; Warren, C. J.; Kelley, S. P. and Sherlock, S. C. (2018). Recycling Argon through Metamorphic Reactions: the Record in Symplectites. Lithos, 300-301 pp. 200–211.

Written by a former PhD student from the lab and current OU academics Chris’ paper looks at Ar in metamorphic rocks from the Western Gneiss Region of Norway which preserved evidence for breakdown of phengite to biotite and plagioclase sympletites. The Ar data show that despite heating to ~700°C the Ar has not been completely removed – the Ar released during the breakdown of the phengite appears partially reincorporated into the new minerals. Another study showing that the microtextural and petrographic evolution is critical for Ar studies.