Fig. 4
Representative textures of the tremolite–calcite veins. a Outer band, sample ALG14. Reaction front with phlogopite and Fe–Mn oxides between dolomite marble and outward radiating bundles of tremolite with very fine grained calcite. b Outer band, sample ALG15, outward radiating bundles of tremolite grading to very fine grained calcite. c Inner band, sample ALG02, iso-oriented, fine grained needle- and fibre-like tremolite (+ talc) oriented subparallel to the axial plane. d Core, sample ALG14, large, single crystal of spar calcite with needles of tremolite. Thin sections; a plane polarised light; b, c, d crossed polars