Progressive Britle-Ductile Deformation DM the Demirköy Pluton of the Strandjha Massive of Thrace-Turkey

Year 1990, Volume: 110 Issue: 110, 77 - 87, 01.03.1990

M-atilla Çağlayan Metin Şengün Ayhan Yurtsever

Abstract

Demirköy pluton, a Lower Cretaceous granitic body of the Strandjha massive of Thrace-Turkey, vary compositionally
from a syeno-granite to quartz-diorite. The periphery of the granite has been converted to mortar gneiss and mylonite
gneiss/schist. The host rocks, where they are of a pelitic origin, have been transformed into foliated contact schists comprising
cordierite and andalusite. The intensity of shear shows a progressive diminution avvay from the periphery. The brittle-ductile
deformation is ascribed to the emplacement of the granite causing multistage developments of multidirectional cleavage, king
type folding and shear pods that are observable in macroscopic and microscopic dimensions. The deformation is not attributed to
large displacements, but is rather interpreted as the cumulative result of en echelon shearing. 

Keywords

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