Deformation-Induced and Reaction-Enhanced Permeability in Metabasic Gneisses, Iona, Scotland: Controls and Scales of Retrograde Fluid Movement

Figure 3

Photomicrographs of thin sections (plane polarized light: PPL). (a) Host metabasic gneiss with granoblastic texture, slightly elongate hornblende (hbl), albite (ab), and chlorite (chl) (abbreviations follow Whitney and Evans [95]); (b) thin section scan (sample G) (left view) and structural, lithological interpretation of texture (right view); (c) thin section scan (sample H) (left view) and structural, lithological interpretation of texture (right view); (d) thin section scan (sample I) (left view) and structural, lithological interpretation of texture (right view). The legend shows the ratio of elemental wt% Ca/Na determined by energy dispersive spectrometry.

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