High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history
The distribution of oceanic domains and continental blocks in Central Anatolia remains a challenge in understanding the Alpine geodynamic evolution of the Tethys realm. The consumption of a Neotethys oceanic branch at the Mesozoic-Cenozoic boundary welded the Central Anatolian Crystalline Complex in...
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| Format: | Journal Article |
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American Geophysical Union
2010
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| Online Access: | http://hdl.handle.net/20.500.11937/10558 |
| _version_ | 1848747565741244416 |
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| author | Pourteau, Amaury Candan, O. Oberhnsli, R. |
| author_facet | Pourteau, Amaury Candan, O. Oberhnsli, R. |
| author_sort | Pourteau, Amaury |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The distribution of oceanic domains and continental blocks in Central Anatolia remains a challenge in understanding the Alpine geodynamic evolution of the Tethys realm. The consumption of a Neotethys oceanic branch at the Mesozoic-Cenozoic boundary welded the Central Anatolian Crystalline Complex in central Turkey and the Anatolide-Tauride Block in western Turkey, with the northerly Eurasian margin. Whether those two regions constituted a single or two distinct continental masses is still matter of debate. High-pressure metamorphism has been locally evidenced in the Afyon Zone, which was, however, defined as a greenschist-facies metamorphic zone of the Anatolide-Tauride Block. Since the Afyon Zone composes a metamorphic equivalent of a continental margin exposed far south of the Izmir-Ankara suture zone, this encouraged us to reevaluate its metamorphic evolution in order to better understand the relation between western and central Turkey. Our investigations reveal that the high-pressure minerals Fe-Mg-carpholite and glaucophane are present in the entire Afyon Zone, which we reconsider as a blueschist-facies zone. We additionally present a tectonic reconstruction, stripping off the postcollisional tectonics. It reveals that today's bending of the high-pressure belt is consistent with an Eocene collision of the Anatolide-Tauride Block around the southern edge of the Central Anatolian Crystalline Complex. We argue that the Central Anatolian Crystalline Complex and the Anatolide-Tauride Block were two distinct continental masses separated by a Neotethyan oceanic stripe, the closure of which engendered subduction-related metamorphism in the latter and arc volcanism and high-grade metamorphism in the former by late Cretaceous to early Cenozoic. Copyright © 2010 by the American Geophysical Union. |
| first_indexed | 2025-11-14T06:51:10Z |
| format | Journal Article |
| id | curtin-20.500.11937-10558 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:51:10Z |
| publishDate | 2010 |
| publisher | American Geophysical Union |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-105582017-09-13T14:55:05Z High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history Pourteau, Amaury Candan, O. Oberhnsli, R. The distribution of oceanic domains and continental blocks in Central Anatolia remains a challenge in understanding the Alpine geodynamic evolution of the Tethys realm. The consumption of a Neotethys oceanic branch at the Mesozoic-Cenozoic boundary welded the Central Anatolian Crystalline Complex in central Turkey and the Anatolide-Tauride Block in western Turkey, with the northerly Eurasian margin. Whether those two regions constituted a single or two distinct continental masses is still matter of debate. High-pressure metamorphism has been locally evidenced in the Afyon Zone, which was, however, defined as a greenschist-facies metamorphic zone of the Anatolide-Tauride Block. Since the Afyon Zone composes a metamorphic equivalent of a continental margin exposed far south of the Izmir-Ankara suture zone, this encouraged us to reevaluate its metamorphic evolution in order to better understand the relation between western and central Turkey. Our investigations reveal that the high-pressure minerals Fe-Mg-carpholite and glaucophane are present in the entire Afyon Zone, which we reconsider as a blueschist-facies zone. We additionally present a tectonic reconstruction, stripping off the postcollisional tectonics. It reveals that today's bending of the high-pressure belt is consistent with an Eocene collision of the Anatolide-Tauride Block around the southern edge of the Central Anatolian Crystalline Complex. We argue that the Central Anatolian Crystalline Complex and the Anatolide-Tauride Block were two distinct continental masses separated by a Neotethyan oceanic stripe, the closure of which engendered subduction-related metamorphism in the latter and arc volcanism and high-grade metamorphism in the former by late Cretaceous to early Cenozoic. Copyright © 2010 by the American Geophysical Union. 2010 Journal Article http://hdl.handle.net/20.500.11937/10558 10.1029/2009TC002650 American Geophysical Union unknown |
| spellingShingle | Pourteau, Amaury Candan, O. Oberhnsli, R. High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history |
| title | High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history |
| title_full | High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history |
| title_fullStr | High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history |
| title_full_unstemmed | High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history |
| title_short | High-pressure metasediments in central Turkey: Constraints on the Neotethyan closure history |
| title_sort | high-pressure metasediments in central turkey: constraints on the neotethyan closure history |
| url | http://hdl.handle.net/20.500.11937/10558 |