Photomicrographs showing thin sections (a, b, c; cross-polarized light) and SEM-BSE images (d) illustrating representative textural and mineralogical features of rocks. (a) Metagreywacke displaying subgrain deformation in quartz, indicating dynamic recrystallization. (b) Albitization in metadacite marked by albitized plagioclase and the development of albite microlites in the groundmass. (c) Replacement of albite by K-feldspar with ankerite in metabasalt. (d) Carbonate alteration in metarhyolite showing ankerite and dolomite superimposed on albite with inclusions of zircon, monazite and apatite. Abbreviation: Ab: albite; Ap: apatite; Ank: ankerite; Cb: carbonate; Dol: dolomite; Kfs: K-feldspar; Mnz: monazite; Pl: plagioclase; Zrn: zircon.