| DOI | 10.1130/B35040.1
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| Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation |
| Parlak O.; Dunkl I.; Karaoğlan F.; Kusky T.M.; Zhang C.; Wang L.; Koepke J.; Billor Z.; Hames W.E.; Şimşek E.; Şimşek G.; Şimşek T.; Öztürk S.E.
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| 发表日期 | 2019
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| ISSN | 167606
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| 起始页码 | 2011
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| 结束页码 | 2038
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| 卷号 | 131期号:2021-11-12 |
| 英文摘要 | The Beyşehir-Hoyran Nappes, including Mesozoic carbonate platform rocks, deep-sea sediments, and ophiolite-related units, crop out extensively on the western limb of the Isparta Angle in the Central Taurides, Turkey. The ophiolite-related rocks are represented by variably serpentinized harzburgitic mantle tectonites, tectonically underlain by a subophiolitic metamorphic sole and mélange. The harzburgitic mantle tectonites and metamorphic sole are intruded by undeformed isolated dikes. Protoliths of the metamorphic sole are similar to within-plate alkali basalts and associated sediments. The isolated dikes were geochemically derived mainly from tholeiitic magma and, to a lesser extent, from alkaline magma. Five isolated dike samples yielded U-Pb ages ranging from 90.8 ± 1.6 Ma to 87.6 ± 2.1 Ma (zircon) and from 102.3 ± 7.4 Ma to 87.5 ± 7.9 Ma (titanite). Seven amphibolite samples yielded U-Pb age ranges of 91.1 ± 2.1-88.85 ± 1.0 Ma (zircon) and 94.0 ± 4.8-90.0 ± 9.4 Ma (titanite) and a 40Ar-39Ar age range of 93.7 ± 0.3-91.4 ± 0.4 Ma (hornblende). U-Pb and 40Ar-39Ar ages of mineral phases with different closure temperatures (~900-500 °C) from the isolated dikes and metamorphic sole rocks are almost identical and overlapping within 1σ, suggesting that both the magmatic growth of oceanic crust and formation of metamorphic sole were contemporaneous and cooled very rapidly. Hence, all the data should be interpreted as the crystallization ages of the ophiolite and metamorphic sole pair. Genesis of suprasubduction zone-type oceanic crust, genesis and exhumation of the metamorphic sole, and postmetamorphic dike emplacement within the Inner Tauride Ocean can be best explained by subduction initiation and rollback processes during the Late Cretaceous based on petrological and geochronological data obtained from the ophiolitic rocks of the Beyşehir-Hoyran Nappes. © 2019 Geological Society of America. |
| 语种 | 英语
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| 来源期刊 | Bulletin of the Geological Society of America
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| 文献类型 | 期刊论文
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| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/184928
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| 作者单位 | Department of Geological Engineering, Çukurova University, Balcali, Adana, 01330, Turkey; State Key Laboratory of Geological Processes and Mineral Resources, Center for Global Tectonics, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; Geoscience Center, University of Göttingen, Goldschmidtstrasse 3, Göttingen, 37077, Germany; Department of Geological Engineering, Middle East Technical University, Ankara, 06800, Turkey; Institut für Mineralogie, University of Hannover, Callinstrasse 3, Hannover, 30167, Germany; Department of Geology and Geography, Auburn University, Auburn, AL 36849, United States
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推荐引用方式
GB/T 7714 |
Parlak O.,Dunkl I.,Karaoğlan F.,et al. Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation[J],2019,131(2021-11-12).
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| APA |
Parlak O..,Dunkl I..,Karaoğlan F..,Kusky T.M..,Zhang C..,...&Öztürk S.E..(2019).Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation.Bulletin of the Geological Society of America,131(2021-11-12).
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| MLA |
Parlak O.,et al."Rapid cooling history of a Neotethyan ophiolite: Evidence for contemporaneous subduction initiation and metamorphic sole formation".Bulletin of the Geological Society of America 131.2021-11-12(2019).
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