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3. GEOLOGICAL FRAMEWORK
Fig. 22.
Textural characteristics of the coronitic metagabbros from the Sobrado Unit, Órdenes Complex. (
a
) Olivine
pseudomorph with core region replaced by anthophyllite-tremolite aggregate, and external corona of orthopyroxene-
pargasite. (
b-c
) Orthopyroxene-clinopyroxene-garnet-pargasite corona between olivine and plagioclase. (
d-g
)
Orthopyroxene aggregates after olivine separated from plagioclase by clinopyroxene (inner) and garnet (outer) coronas. (
h
)
Recrystallized plagioclase with abundant inclusions of kyanite and corundum, also visible in (
f
) and (
g
). The development of
these coronas is associated to a prograde path with drastic pressure increase (Arenas and Martínez Catalán, 2002).