As shown in the previous page,
by oxygen isotope*
on quartz-kyanite pair in veins and surrounding metapelites*
revealed concordant temperatures with those obtained by conventional
(620 to 720°C according to method and calibration of Sharp (1992,
[reference], 1995 [reference])).
This confirms that these veins were formed during peak
of metamorphism* (maximum of temperature) as suggested by our structural*
study. The texture*
analysis in veins demonstrate andalusite formation after retromorphosis
of kyanite (see figures on the left and hereunder).
Centimetric cristal of kyanite partially retromorphosed in andalusite,
shape of andalusite crystal (on the right, rosa) conserve the tabluar
form of kyanite (on the left, blue).