Fig. 2

General view of the stockwork of tremolite–calcite veins in Tèggiolo metasediments at Alagua (a, and close up view b) and veins in Baceno metasediments along Rio Antolina (c, d). Toward the tip, veins lack the core of calcite and part of the layered band. In d the inner part of the veins is made up only of pale green to whitish tremolite in needles and bundles of fibres slightly inclined with respect to the fracture wall. The two symmetrical outer layers are formed by needles of tremolite in a radial texture cemented by interstitial calcite and Fe–Mn oxides, the latter being responsible for the overall brown colour