Revealing the Mineralogical and Petrographic Signs of Fluid-Related Processes in the Kelebia Basement Area (Szeged Basin, S Hungary): A Case Study of Alpine Prograde Metamorphism in a Permo-Triassic Succession

Figure 6

Thin-section photomicrographs of the Permian siliciclastic rocks ((a–d) well Kel–12 core #3; (e, f) well Kel–14 core #3). (a) Broken quartz and plagioclase crystals in the fine-grained matrix showing a weakly developed foliation (yellow line). Note: selective carbonatization of the matrix material. (b) A broken resorbed crystal of volcanic quartz. (c, d) Strain fringes around saddle dolomite core objects which show sweeping extinction. (e, f) Domainal spaced cleavage (foliation is indicated by the yellow line) with quartz and muscovite stacks in microlithons. Abbreviations: PPL: plane-polarized light; XPL: cross-polarized light; Cb: carbonate; Dol: dolomite; Hem: hematite; Ms: muscovite (detrital); Pl: plagioclase; Qz: quartz.

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