Counterclockwise P-T-t trajectory from the metamorphic sole of a Neo-Tethyan ophiolite (Turkey)

Yildirim Dilek; Donna L. Whitney

doi:10.1016/S0040-1951(97)00038-3

Counterclockwise P-T-t trajectory from the metamorphic sole of a Neo-Tethyan ophiolite (Turkey)

Yildirim Dilek, Donna L. Whitney

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

100 Scopus citations

Abstract

The Kiziltepe ophiolitic thrust sheet in the Bolkar Mountains of Turkey occurs between two subparallel ophiolite belts bounding the Tauride carbonate platform and represents a remnant of the Cretaceous Neo-Tethyan oceanic lithosphere. It is underlain by foliated amphibolite that represents a metamorphic sole developed at the inception of an intra-oceanic subduction zone in the Neo-Tethys ∼92-90 Ma. Blueschist-facies overprinting of the amphibolite indicates that the metamorphic sole was dragged deeper into the subduction zone where it experienced increasing P/T with cooling. Regional tectonic constraints suggest a Maastrichtian age for the timing of this blueschist-facies metamorphism. Sodic amphibole-rich veins and crossite/Mg-riebeckite rims on hornblende suggest that growth of blueschist-facies minerals was facilitated by infiltration of fluid along fractures and grain boundaries. We infer a counterclockwise P-T-t trajectory during which metamorphism was accompanied/succeeded by rapid uplift along the northern edge of the Tauride belt in Late Cretaceous-early Tertiary time.

Original language	English (US)
Pages (from-to)	295-310
Number of pages	16
Journal	Tectonophysics
Volume	280
Issue number	3-4
DOIs	https://doi.org/10.1016/S0040-1951(97)00038-3
State	Published - Oct 30 1997

Bibliographical note

Funding Information:
This study is supported by grants from the NSF (EAR-9219064 to Y. Dilek and EAR-9317100 to D.L. Whitney), Vassar College Faculty Research Funds, and Miami University manuscript preparation funds. 4°Ar/39Ar dating of amphibolites and dike rocks was done by Brad Hacker at Stanford University. Critical and constructive reviews of an early version by Virginia Sisson, Robert Coleman, and John Platt improved the paper. We thank Edwin Brown and Rebecca Jamieson for their thorough reviews for Tectonophysics.

Keywords

Eastern Mediterranean region
Geology of Turkey
Metamorphic sole
Neo-Tethys
Ophiolite
P-T-t trajectory

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10.1016/S0040-1951(97)00038-3

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title = "Counterclockwise P-T-t trajectory from the metamorphic sole of a Neo-Tethyan ophiolite (Turkey)",

abstract = "The Kiziltepe ophiolitic thrust sheet in the Bolkar Mountains of Turkey occurs between two subparallel ophiolite belts bounding the Tauride carbonate platform and represents a remnant of the Cretaceous Neo-Tethyan oceanic lithosphere. It is underlain by foliated amphibolite that represents a metamorphic sole developed at the inception of an intra-oceanic subduction zone in the Neo-Tethys ∼92-90 Ma. Blueschist-facies overprinting of the amphibolite indicates that the metamorphic sole was dragged deeper into the subduction zone where it experienced increasing P/T with cooling. Regional tectonic constraints suggest a Maastrichtian age for the timing of this blueschist-facies metamorphism. Sodic amphibole-rich veins and crossite/Mg-riebeckite rims on hornblende suggest that growth of blueschist-facies minerals was facilitated by infiltration of fluid along fractures and grain boundaries. We infer a counterclockwise P-T-t trajectory during which metamorphism was accompanied/succeeded by rapid uplift along the northern edge of the Tauride belt in Late Cretaceous-early Tertiary time.",

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note = "Funding Information: This study is supported by grants from the NSF (EAR-9219064 to Y. Dilek and EAR-9317100 to D.L. Whitney), Vassar College Faculty Research Funds, and Miami University manuscript preparation funds. 4°Ar/39Ar dating of amphibolites and dike rocks was done by Brad Hacker at Stanford University. Critical and constructive reviews of an early version by Virginia Sisson, Robert Coleman, and John Platt improved the paper. We thank Edwin Brown and Rebecca Jamieson for their thorough reviews for Tectonophysics.",

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AU - Whitney, Donna L.

N1 - Funding Information: This study is supported by grants from the NSF (EAR-9219064 to Y. Dilek and EAR-9317100 to D.L. Whitney), Vassar College Faculty Research Funds, and Miami University manuscript preparation funds. 4°Ar/39Ar dating of amphibolites and dike rocks was done by Brad Hacker at Stanford University. Critical and constructive reviews of an early version by Virginia Sisson, Robert Coleman, and John Platt improved the paper. We thank Edwin Brown and Rebecca Jamieson for their thorough reviews for Tectonophysics.

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N2 - The Kiziltepe ophiolitic thrust sheet in the Bolkar Mountains of Turkey occurs between two subparallel ophiolite belts bounding the Tauride carbonate platform and represents a remnant of the Cretaceous Neo-Tethyan oceanic lithosphere. It is underlain by foliated amphibolite that represents a metamorphic sole developed at the inception of an intra-oceanic subduction zone in the Neo-Tethys ∼92-90 Ma. Blueschist-facies overprinting of the amphibolite indicates that the metamorphic sole was dragged deeper into the subduction zone where it experienced increasing P/T with cooling. Regional tectonic constraints suggest a Maastrichtian age for the timing of this blueschist-facies metamorphism. Sodic amphibole-rich veins and crossite/Mg-riebeckite rims on hornblende suggest that growth of blueschist-facies minerals was facilitated by infiltration of fluid along fractures and grain boundaries. We infer a counterclockwise P-T-t trajectory during which metamorphism was accompanied/succeeded by rapid uplift along the northern edge of the Tauride belt in Late Cretaceous-early Tertiary time.

AB - The Kiziltepe ophiolitic thrust sheet in the Bolkar Mountains of Turkey occurs between two subparallel ophiolite belts bounding the Tauride carbonate platform and represents a remnant of the Cretaceous Neo-Tethyan oceanic lithosphere. It is underlain by foliated amphibolite that represents a metamorphic sole developed at the inception of an intra-oceanic subduction zone in the Neo-Tethys ∼92-90 Ma. Blueschist-facies overprinting of the amphibolite indicates that the metamorphic sole was dragged deeper into the subduction zone where it experienced increasing P/T with cooling. Regional tectonic constraints suggest a Maastrichtian age for the timing of this blueschist-facies metamorphism. Sodic amphibole-rich veins and crossite/Mg-riebeckite rims on hornblende suggest that growth of blueschist-facies minerals was facilitated by infiltration of fluid along fractures and grain boundaries. We infer a counterclockwise P-T-t trajectory during which metamorphism was accompanied/succeeded by rapid uplift along the northern edge of the Tauride belt in Late Cretaceous-early Tertiary time.

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KW - Geology of Turkey

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Counterclockwise P-T-t trajectory from the metamorphic sole of a Neo-Tethyan ophiolite (Turkey)

Abstract

Bibliographical note

Keywords

UN SDGs

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