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Granulites are, by definition, rocks that crystallized at high
temperatures. It is generally agreed that they were formed in
regions where the geothermal gradient exceeded normal continental
values. These rocks commonly display coronitic mineral fabrics
which may be used to trace the thermal and geodynamic history of
the continental crust. In the same way that eclogites provide
information on the earliest stages of some orogenic episodes,
granulites usually tell us about later events, including thermal
anomalies, thermal reequilibration, CO streaming, crustal melting,
and 2 differentiation of the continental crust. Their study is
particularly important if we are to under stand the nature of the
middle and lower continental crust. Consistent with the
contributions I received, the contents of this volume fall into
four general areas: Crustal Evolution, Regional Syntheses, F1uids
and Petrological Equilibria, Geochemistry and Geophysics. These
represent an up-to-date reflection of the centres of interest in
the field of granulites. The first manuscripts arrived in September
1988 while the conference was held, the last contribution arrived
in November 1989, more than a year later. I apologize to those who
were prompt and took deadlines seriously, but I believe that it was
worth waiting to secure a product covering most of the important
aspects concerning granulite genesis. All papers were vetted by at
least two reviewers. I would like to thank RJ. Arculus, N.T. Arndt,
P. Barbey, SR. Bohlen, AM. Boullier, M. Brown, T. Chacko, 1.D.
Clemens, K.C. Condie, J.C. Duchesne, C. Dupuy, w.G."
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