Fig. 11

Lithologies of the Raccias Unit. a Characteristic feature of eclogite-facies Fe-Ti gabbro cropping out in the Punta Raccias area (44° 58′ 27.13′′ N, 7° 4′ 55.38′′ E) and of Mg–Al smaragdite gabbro (b) exposed close to Massello (44° 57′ 10.56′′ N, 7° 3′ 34.37′′ E). The eclogite (a) is essentially made of garnet, deep green omphacite, dark blue glaucophane and epidote. A large amount of rutile is seen at the microscope. The smaragdite metagabbro (b) displays bright green Cr-rich omphacite, topotactically replacing the magmatic clinopyroxene, in a foliated matrix consisting of clinozoisite, Mg-rich chlorite and tremolite/actinolite, with scarce rutile rimmed by titanite