Neotethyan ophiolitic rocks of the Anatolides of NW Turkey and comparison with Tauride ophiolites

2003-11-01
Onen, AP
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The Izmir-Ankara-Erzincan zone in Turkey is part of the Anatolide belt. In NW Anatolia, near Kutahya, the ophiolitic rocks within the Izmir-Ankara-Erzincan suture zone have a tholeiitic character and oceanic back-arc chemistry. Amphibolites form a metamorphic sole to part of the ophiolite in the Kutahya region and yield an Ar-40/Ar-39 age of 93 +/- 2 Ma, interpreted to record high-grade metamorphism and intraoceanic thrusting of pre-existing ocean crust. Gabbros and dykes yield Ar-40/Ar-39 ages of 94 +/- 13 Ma and 48 +/- 12 Ma. The first is suggested to be the ophiolite formation age, and the second a regional metamorphic event, The ophiolitic rocks of the Kutahya region are composite and record several events in the evolution of a Neotethyan seaway situated in north-central Anatolia and farther east. They are interpreted to have formed in a small ocean basin marginal to the subducting Izmir-Ankara-Erzincan ocean. The Kutahya ophiolites of the Anatolide belt are similar in age to the Tauride ophiolites, and the sub-ophiolite metamorphic rocks and dykes in the ultramafic parts of the ophiolites in the Anatolide-Tauride Block formed at the same intraoceanic subduction zone within the same Neotethyan ocean.
Neotethyan, Back-arc basins, Ophiolites, İzmir-Ankara-Erzincan zone
https://hdl.handle.net/11511/64294
JOURNAL OF THE GEOLOGICAL SOCIETY
Department of Geological Engineering, Article

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Citation Formats
A. Onen, “Neotethyan ophiolitic rocks of the Anatolides of NW Turkey and comparison with Tauride ophiolites,” JOURNAL OF THE GEOLOGICAL SOCIETY, pp. 947–962, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/64294.
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