We have described St+Crd+Grt+Bt+Ky/Sil/And+Ms+Qtz assemblages in medium
grade metapelites from the Betic Cordilleras (Spain). We interpreted the
assemblages and associated reaction textures as the result of fast
decompression, and concluded that disequibrium better explain their
occurrence in these metapelites. See:

Garcia-Casco, A. and Torres-Roldan, R.L (1999) Natural metastable reactions
involving garnet, staurolite and cordierite: implications for petrogenetic
grids and the extensional collapse of the Betic-Rif Belt. Contributions to
Mineralogy and Petrology, 136, 131-153.

best regards

Antonio Garcia Casco
Departamento de Mineralogia y Petrologia
Facultad de Ciencias, Universidad de Granada
Fuentenueva s/n
18002 Granada
Tel: + 34 958 246613
Fax: + 34 958 243368
email: [log in to unmask]

-----Original Message-----
    De: Régnier Jean-Luc <[log in to unmask]>
    Para: [log in to unmask] <[log in to unmask]>
    Fecha: jueves 12 de julio de 2001 17:11
    Asunto: ms+ cd +st +bi assemblage

    Dear All,

    In relation with the paper from Pattison and al  " polymetamorphic
origin of muscovite + cordierite + Staurolite + biotite " (1999), I would
like to know yours opinions about this thins section (attachment) found in "
la Montagne Noire " (France) where the equilibrium at Tmax seems to be
    Do you know some other examples like this?


    Régnier Jean-Luc
    Johannes Gutenberg-Universität
    Institut für Geowissenschaften, FB 22
    Becherweg 21, 55099 Mainz
    tel: (0049)-6131-39-24767 (office)
    tel: (0049)-6131-216469 (home)