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<p>The rocks of the Bozkır, Bolkardağı, and Aladağ units, exposed in the eastern part of the Central Taurides in southern Türkiye, result from a series of geological processes from subduction to hard collision, following their formation in the Inner Tauride Ocean. The Bozkır Unit is composed of ophiolites, a metamorphic sole, and mélanges. The Bolkardağı Unit comprises metamorphic rocks, while the Aladağ Unit predominantly consists of limestone and dolomite in the study area. The structural evolution of the Taurides remains poorly understood due to a lack of analytical data. This study integrates the facies characteristics of the Tauride units with their kinematic data to draw conclusions about their structural evolution and evaluate the direction of palaeostresses causing deformation. In addition to conventional field studies, structural data, including planar and linear deformation structures, were measured from all individual units and analysed using stereographic projections. The folds of the Bolkardağı and Aladağ units, exhibiting a NW vergence around a NE-SW direction fold axial plane inclined to the SE direction, have been subjected to deformation under the influence of compression from southeast to northwest. The majority of the faults are classified as reverse faults, exhibiting a NE-SW striking, dipping towards the SE. The analysis indicates that the predominant palaeostress was oriented from southeast to northwest, as evidenced by the stress slickenlines in the hanging wall of the fault planes. The emplacement of the tectonostratigraphic units and their subsequent post-emplacement deformations indicate that compressional deformation occurred in two distinct directions during the Late Cretaceous to Eocene period. We interpret the SE-directed emplacement of Tauride units during the Turonian to Middle Eocene as a result of thrust tectonics. Conversely, the NW-directed backthrusting that occurred during the Middle-Late Eocene is associated with the tightening of the suture zone of the Inner Tauride Ocean.</p>

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Unravelling the tectonostratigraphy and kinematics of the Late Cretaceous-Eocene deformations in the Eastern Central Taurides (Türkiye)

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • Tolga Esirtgen,
  • Ayhan Ilgar

摘要

The rocks of the Bozkır, Bolkardağı, and Aladağ units, exposed in the eastern part of the Central Taurides in southern Türkiye, result from a series of geological processes from subduction to hard collision, following their formation in the Inner Tauride Ocean. The Bozkır Unit is composed of ophiolites, a metamorphic sole, and mélanges. The Bolkardağı Unit comprises metamorphic rocks, while the Aladağ Unit predominantly consists of limestone and dolomite in the study area. The structural evolution of the Taurides remains poorly understood due to a lack of analytical data. This study integrates the facies characteristics of the Tauride units with their kinematic data to draw conclusions about their structural evolution and evaluate the direction of palaeostresses causing deformation. In addition to conventional field studies, structural data, including planar and linear deformation structures, were measured from all individual units and analysed using stereographic projections. The folds of the Bolkardağı and Aladağ units, exhibiting a NW vergence around a NE-SW direction fold axial plane inclined to the SE direction, have been subjected to deformation under the influence of compression from southeast to northwest. The majority of the faults are classified as reverse faults, exhibiting a NE-SW striking, dipping towards the SE. The analysis indicates that the predominant palaeostress was oriented from southeast to northwest, as evidenced by the stress slickenlines in the hanging wall of the fault planes. The emplacement of the tectonostratigraphic units and their subsequent post-emplacement deformations indicate that compressional deformation occurred in two distinct directions during the Late Cretaceous to Eocene period. We interpret the SE-directed emplacement of Tauride units during the Turonian to Middle Eocene as a result of thrust tectonics. Conversely, the NW-directed backthrusting that occurred during the Middle-Late Eocene is associated with the tightening of the suture zone of the Inner Tauride Ocean.