Everest Series metamorphic cycle 09/01/2006—01/11/2008

Illustrating the metamorphic evolution of the lower part of the Everest Series (a.k.a. North Col Formation) in the footwall of the South Tibetan Detachment System, from samples collected by LR Wager on the 1933 British Everest expedition. Relationships between at least three fabric-forming deformation episodes and the successive growth of the index minerals garnet, staurolite, sillimanite and andalusite define a clockwise P-T path, with peak conditions in the sillimanite-muscovite zone at about 630°C, 5 kbar.