Origin of metamorphic soles and their post‐kinematic mafic dyke swarms in the Antalya and Lycian ophiolites, SW Turkey

Çelik, Ömer Faruk; Delaloye, Michel

doi:10.1002/gj.954

Cited by 64 publications

(1 citation statement)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The upper mantle peridotites consist mainly of harzburgite with dunite and minor lherzolite. There are no dike intrusions or rodingites within these peridotite units, as commonly reported from other suprasubduction zone Tethyan ophiolites in the eastern Mediterranean region (Dilek et al, 1999;Çelik and Delaloye, 2003). Dunite veins and layers increase in abundance in the upper parts of the harzburgitic peridotites and locally contain trace amounts of chromitite.…”

Section: Igneous Stratigraphy Of the Küre Ophiolitesupporting

confidence: 73%

Seafloor spreading structure, geochronology, and tectonic evolution of the Küre ophiolite, Turkey: A Jurassic continental backarc basin oceanic lithosphere in southern Eurasia

Alparslan

Dilek

2018

Lithosphere

View full text Add to dashboard Cite

The Küre ophiolite in the Sakarya terrane in northern Anatolia is a Penrose-type ophiolite, complete with a sheeted dike complex, and includes well-developed volcanogenic massive sulfide deposits. It is tectonically imbricated along south-directed thrust faults between the Paleozoic, continental basement rocks of the Devrekani Massif (Eurasia) to the north and the Late Triassic-Early Cretaceous subduction-accretion complexes (Tethys) to the south. The ~5-km-thick crustal lithologies in the ophiolite are crosscut by west-northwest-east-southeast-oriented, extensional ductile-brittle shear zones and normal faults that display hydrothermal mineralization and seafloor alteration effects. The westnorthwest-east-southeast-striking sheeted dikes and these extensional fault systems indicate a north-northeast-south-southwest seafloor spreading direction during the magmatic evolution of the ophiolite. The U-Pb zircon dating of a gabbroic rock has revealed a concordant age of 168.8 ± 2 Ma that represents the timing of the igneous construction of the ophiolite. Sandstone units in the ~3-km-thick turbiditic sedimentary cover of the ophiolite contain Paleoarchean, Neoarchean, and Proterozoic detrital zircons, derived from the Ukrainian shield and the East European Platform, indicating a proximal position of the Küre basin to Eurasia during its development. The Küre ophiolite represents a Middle Jurassic continental backarc basin ophiolite with a Eurasian affinity.

show abstract

Section: Igneous Stratigraphy Of the Küre Ophiolitesupporting

confidence: 73%

Seafloor spreading structure, geochronology, and tectonic evolution of the Küre ophiolite, Turkey: A Jurassic continental backarc basin oceanic lithosphere in southern Eurasia

Alparslan

Dilek

2018

Lithosphere

View full text Add to dashboard Cite

show abstract

Tectonic evolution and paleogeography of the Kırşehir Block and the Central Anatolian Ophiolites, Turkey

et al. 2016

View full text Add to dashboard Cite

In Central and Western Anatolia two continent-derived massifs simultaneously underthrusted an oceanic lithosphere in the Cretaceous and ended up with very contrasting metamorphic grades: high pressure, low temperature in the Tavşanlı zone and the low pressure, high temperature in the Kırşehir Block. To assess why, we reconstruct the Cretaceous paleogeography and plate configuration of Central Anatolia using structural, metamorphic, and geochronological constraints and Africa-Europe plate reconstructions. We review and provide new 40 Ar/ 39 Ar and U/Pb ages from Central Anatolian metamorphic and magmatic rocks and ophiolites and show new paleomagnetic data on the paleo-ridge orientation in a Central Anatolian Ophiolite. Intraoceanic subduction that formed within the Neotethys around 100-90 Ma along connected N-S and E-W striking segments was followed by overriding oceanic plate extension. Already during suprasubduction zone ocean spreading, continental subduction started. We show that the complex geology of central and southern Turkey can at first order be explained by a foreland-propagating thrusting of upper crustal nappes derived from a downgoing, dominantly continental lithosphere: the Kırşehir Block and Tavşanlı zone accreted around 85 Ma, the Afyon zone around 65 Ma, and Taurides accretion continued until after the middle Eocene. We find no argument for Late Cretaceous subduction initiation within a conceptual "Inner Tauride Ocean" between the Kırşehir Block and the Afyon zone as widely inferred. We propose that the major contrast in metamorphic grade between the Kırşehir Block and the Tavşanlı zone primarily results from a major contrast in subduction obliquity and the associated burial rates, higher temperature being reached upon higher subduction obliquity.

show abstract

Geochemical character and tectonic environment of ultramafic to mafic cumulate rocks from the Tekirova (Antalya) ophiolite (southern Turkey)

2006

View full text Add to dashboard Cite

The Upper Cretaceous Tekirova (Antalya) ophiolite derived from the southern branch of the Neotethys is located at the southwestern part of the Antalya Complex along the Tauride belt in southern Turkey. It comprises harzburgitic tectonites, ultramafic to mafic cumulates, isotropic gabbro, sheeted dykes, volcanics and associated sedimentary rocks. The cumulate rocks are located mainly along the Ç iral-Tekirova section to the south and at Doyran to the north. Several isolated blocks of cumulate rocks are also observed in the north-south-trending Gödene zone of the Antalya Complex. The ultramafic and mafic cumulate rocks are represented by wehrlite, lherzolite, olivine clinopyroxenite, olivine gabbronorite, olivine gabbro, gabbronorite and gabbro. The order of crystallization in the cumulates is olivine (Fo 88-76 ) AE chromian spinel ! clinopyroxene (Mg# 92-76 ) ! orthopyroxene (Mg# 86-70 ) ! plagioclase (An 97-84 ). The major and trace element geochemistry of the plutonic rocks suggests that the primary magma generating the Tekirova (Antalya) ophiolite is compositionally similar to those observed in modern island arc tholeiitic sequences. The presence of highly magnesian clino-and orthopyroxenes along with the absence of plagioclase in the ultramafic cumulates suggest their formation as a result of high-pressure crystal fractionation (c. 10 kbar). In contrast, the mafic cumulates in the upper crustal level show evidence of a lower-pressure (2-2.5 kbar) environment within the same tectonic setting. Therefore, it is suggested that the cumulate ultramafic rocks were probably precipitated as a result of in situ crystallization processes along the walls of a conduit system extending downward from a crustal level magma chamber to mantle depths of approximately 30 km. After their formation, the ultramafic cumulates were transported to a shallow-level magma chamber where the remainder of the plutonic section (mafic cumulates) was formed at a lower pressure environment.

show abstract

Origin of metamorphic soles and their post‐kinematic mafic dyke swarms in the Antalya and Lycian ophiolites, SW Turkey

Cited by 64 publications

References 35 publications

Seafloor spreading structure, geochronology, and tectonic evolution of the Küre ophiolite, Turkey: A Jurassic continental backarc basin oceanic lithosphere in southern Eurasia

Seafloor spreading structure, geochronology, and tectonic evolution of the Küre ophiolite, Turkey: A Jurassic continental backarc basin oceanic lithosphere in southern Eurasia

Tectonic evolution and paleogeography of the Kırşehir Block and the Central Anatolian Ophiolites, Turkey

Geochemical character and tectonic environment of ultramafic to mafic cumulate rocks from the Tekirova (Antalya) ophiolite (southern Turkey)

Contact Info

Product

Resources

About