Textural and mineralogical evidence for a Cadomian tectonothermal event in the eastern Mediterranean (Sandıklı-Afyon area, western Taurides, Turkey)

Comments on “Deformation of the Lower Cambrian Sequence in the Sandikli Region (Afyon), central Turkey” by T. Güngör

“…This field observation is a conclusive evidence for the relative age of the basement-cover relations in SW Sandıklı area [3,4,8,9,12,13] and shows that both the deposition of the Güvercinoluk sediments, the intrusion of the Kestel Cayı Porphyroid Suite (Kestel Çayı Volcanics) and their dynamic metamorphism all predate deposition of the Göğebakan Formation.…”

“…The stratigraphic succession presented by Güngör [1] is inconsistent with the two-fold division of ours [3,4,5,6,7,8,9,11,12,13] including a Neoproterozoic basement (Sandıklı Basement Complex) and its Early Palaeozoic cover ( Fig. 1, 2).…”

“…The last deformation is ascribed to the Alpine compressional events by Gürsu et al [8] and Bozkaya et al [9,13]. On the regional scale, this deformation is exemplified by thrusts and reverse faults.…”

“…According to Bozkaya et al [9,13] illite crystallinity studies reveal that both the basement and cover units were metamorphosed at high anchizonal to epizonal conditions (~ 300 ºC). Textural data together with detailed evaluation of the P-T-b 0 grid, however, indicate that this thermal event has multiple phases.…”

“…We have been working since 1995 on the geological, petrological, and deformational features of the same rock-units in the same area [2,3,4,5,6,7,8,9,10,11,12,13,14] and will comment on several issues including very critical field observations, geological mapping and petrographic/microtectonic features. The comments of ours are more than local disagreements in the fieldwork.…”