I am looking for a rapidly cooled metamorphic terrane, containing garnet,
that was intruded at a much later date (in the hundreds Ma) by a granite
(or other heat source). It would be nice if garnet was found in most of
the isograds associated with the granite aureole. In addition, alteration
associated with cooling and or hydrous fluids should be minimal.
The reason for this specific setting is that I want to use the granite
thermal overprint as a natural experiment to determine the closure
temperature of garnet by looking at diffusion profiles in garnet. This has
a much better chance of success than carrying out laboratory diffusion
experiments because REE diffuse slowly.
School of Geology,
The University of New South Wales,
UNSW SYDNEY, NSW 2052,
Tel no: (02) 9385 (6142 or 6134)
Fax no: (02) 9385 5935
Email: [log in to unmask]