Abstract

A rare case of rhythmic banded eclogitization on serpentinites in crustal condition (3 km south of Avren village, Krumovgrad district), is interpreted as an effect of seismic impact. Bands of garnet lherzolites (2–5 cm) alternate with strips of unchanged serpentinite. The bands consist of pyrope, diopside, enstatite, olivine, spinel, crystallized at Т 560–820 oC and P 8–15 kbar. The longitudinal P-waves create zones of dilatation in the serpentine structure where the bonds were broken. After crystallization of mobilized particles a stripped texture was formed.

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