Juergen
As you should know by now, the porphs overgrowing differentiated
crenulation cleavages in Bell & Rubenach, 1983 and Reinhardt & Rubenach,
1988, grew early during the next deformation, rather than late in the same
deformation. So the relative timing in B&R and R & R is correct, those
overgrowing stages 3 & 4 of crenulation cleavages grew later than those
overgrowing stage 2, but the actual event in which those overgrowing stages
3 & 4 grew is wrong. They grew in the younger orthogonal event and I have
proved this easily for both lots of rocks - the porphs grown in weak near-
orthogonal cren events that overprint the stage 3 & 4 Sx - with curvature
of Sx due to the weak overprinting Dx+1 event preserved in the outermost
rims (at high mag) and local development of an Sx+1 against the outer rim
(one of the advantagesof multiple strike thinsectioning is you get to see
porphyroblast relationships to external foliations at many different
orientations).
Cheers
Tim
Prof Tim Bell
School of Earth Sciences
James Cook University
Townsville
QLD 4811
Australia
ph: +61 7 47814766
fax: +61 7 47251501
email: [log in to unmask]
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