The tectonics of the Central Anatolian Crystalline Complex a by Côme Lefebvre

By Côme Lefebvre

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It seems, therefore at the scale of the CACC, that there is no systematic relationship between the position in the metamorphic unit and the metamorphic grade. 6 Conclusions In the area around Kaman and Ömerhacılı, high-grade metamorphic rocks of the Kırşehir massif are exposed underneath virtually nonmetamorphic ophiolites, close to the Baranadağ pluton. Field- and microscale structures from the marble-rich footwall sequence indicates that the contact with the overlying ophiolites represents an extensional detachment zone.

Submitted), whereas the northern border of the Idiş Dağı Block is thrusted over the Ayhan basin fill (Köksal and Göncüoğlu 1997). Regionally, the Ayhan basin was most probably involved in part of the Savcılı thrust zone, which runs approximately E-W along the southern margin of the Kırşehir massif (Seymen 2000). 3). Historically, the Hırkadağ Block has been separately studied in domains exposed west and east of the KırşehirNevşehir road (Aydın 1985, Lulu 1993). 3). Three lithological units were identified in the metamorphic rocks of the Hırkadağ Block.

The matrix is dominated by quartz, with undulose extinction, and cordierite with relatively large poikiloblastic garnet crystals (up to 1 cm). 5f). The presence of cordierite near garnet is often associated with well-developed crystal faces of the garnet. Sillimanite shows two preferred orientations, which may be inherited from an earlier crenulation cleavage. Sample H20C presents a mineral assemblage of Sil + Grt + Qz ± Pl ± Bt ± Ilm, partially replaced by a secondary assemblage of Crd + Spl + Kfs + Qz.

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