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Abstract

The Inner Tauride Ocean (ITO) separated the Tauride- Anatolide Block from the Central Anatolian Crystalline Complex. This oceanic basin was consumed as a result of north-dipping subduction and closed during the latest Cretaceous to early Cenozoic times. The Tauride- Anatolide continent exhibits a subducted, deeply buried, metamorphosed at HP-LT conditions sometimes during 88 to 80 Ma and exhumed passive margin within a collisional orogen. A metamorphosed, rifted continental margin of Triassic-Lower Cretaceous age (Tauride- Anatolide platform) is overlain by Upper Cretaceous (Cenomanian-Lower Maastrichtian) pelagic sediments, then by melange and unmetamorphosed ophiolitic rocks (Okay et al., 1998; Sherlock et al., 1999; Seaton et al., 2009; Robertson et al., 2009). Whereas the Central Anatolian Crystalline Complex experienced LP/HT metamorphism and was intruded by granitoids (Whitney and Dilek, 1998; Fayon et al., 2001; Whitney et al., 2001, 2003; Whitney and Hamilton, 2004). The different metamorphic evolution for these continental blocks suggests that the Central Anatolian Crystalline Complex constitutes the upper plate with arc-related magmatism while the Anatolide-Tauride Block represents the subducted lower plate (Robertson et al., 2009; Pourteau et al., 2010). However, some authors question this interpretation and view the Central Anatolian Crystalline Complex as a northerly promontory of the Tauride- Anatolide block, based on lithostratigraphic similarities of the two continental blocks (Göncüoğlu et al. 1997). Subduction-related magmatism and metamorphism occured during different stages of the closure of the Inner Tauride ocean (Figure 1). The new U-Pb ages of the ophiolites and the granitoids from the suture zone provide new constraints. There is no direct fossil evidence from the volcanics of these ophiolites to constrain the timing of the generation of the suprasubduction zone (SSZ) type crust. Therefore, the new ages are important for the timing and continuity of oceanic crust generation in a SSZ setting within the Inner Tauride ocean.

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/content/papers/10.3997/2214-4609-pdb.380.77
2013-05-15
2021-10-16
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