Temporal, geochemical and geodynamic evolution of the Late Cretaceous subduction zone volcanism in the eastern Sakarya Zone, NE Turkey
Implications for mantle-crust interaction in an arc setting
Document identifier: oai:DiVA.org:ltu-77781
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10.1016/j.jseaes.2019.104217Keyword: Natural Sciences,
Earth and Related Environmental Sciences,
Geochemistry,
Naturvetenskap,
Geovetenskap och miljövetenskap,
Geokemi,
Late Cretaceous,
Subduction,
Volcanism,
Mantle–crust interaction,
Sakarya Zone,
Eastern Pontides,
NE Turkey,
Applied Geochemistry,
Tillämpad geokemiPublication year: 2020Abstract: The Late Cretaceous Artvin volcanic rocks (LCAVs) from the eastern Sakarya zone (ESZ) of NE Turkey are composed of mafic/basaltic (S1-Çatak and S2-Çağlayan) and felsic/acidic (S1-Kızılkaya and S2-Tirebolu) rock types that occurred in two successive stages: (i) first stage (S1: Turonian–Early Santonian) and (ii) second stage (S2: Late Santonian–Campanian). Clinopyroxene thermobarometric results point that the S2-Çağlayan basaltic rocks have crystallised at higher temperatures and under deeper crustal conditions than those of the S1-Çatak basaltic rocks.
The LCAVs show a wide compositional spectrum, ranging from tholeiite to calc-alkaline/shoshonite and are typically represented by a geochemical composition resembling subduction-related arc rocks although the 87Sr/86Sr(i) (0.7044–0.7071) and ɛNd(i) values (−0.63 to + 3.47) as well as 206Pb/204Pb(i) (18.07–18.56), 207Pb/204Pb(i) (15.57–15.62) and 208Pb/204Pb(i) (37.12–38.55) ratios show very limited variation. The parent magmas of the S1-Çatak and S2-Çağlayan mafic volcanic rocks were derived from underplated basaltic melts that originated by partial melting of metasomatised spinel lherzolite and spinel-garnet lherzolite, respectively. It is proposed that the compositions of the S1-Kızılkaya (mainly dacitic) and S2-Tirebolu (rhyolitic to trachytic) felsic rocks were particularly controlled by metasomatised mantle–crust interaction and MASH zone + shallow crustal fractionation processes. Our data, together with data from previous studies, suggest that the S1- and S2-mafic and felsic rocks of the LCAVs (~95–75 Ma) are the products of two-stage volcanic event that took place during the northward subduction of the northern Neotethys Ocean (NNO).
Authors
Faruk Aydin
Karadeniz Technical University, Department of Geological Engineering
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Simge Oguz Saka
Karadeniz Technical University, Department of Geological Engineering
Other publications
>>
Cüneyt Sen
Karadeniz Technical University, Department of Geological Engineering
Other publications
>>
Abdurrahman Dokuz
Gümüşhane University, Department of Geological Engineering
Other publications
>>
Thomas Aiglsperger
Luleå tekniska universitet; Geovetenskap och miljöteknik
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>>
Ibrahim Uysal
Karadeniz Technical University, Department of Geological Engineering
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>>
Raif Kandemir
Recep Tayyip Erdoğan University, Department of Geological Engineering
Other publications
>>
Orhan Karsli
Recep Tayyip Erdoğan University, Department of Geological Engineering
Other publications
>>
Bilal Sari
Dokuz Eylül University, Department of Geological Engineering
Other publications
>>
Rasim Baser
Karadeniz Technical University, Department of Geological Engineering
Other publications
>>
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header:
identifier: oai:DiVA.org:ltu-77781
datestamp: 2021-04-19T12:55:41Z
setSpec: SwePub-ltu
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recordCreationDate: 2020-02-19
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http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-77781
10.1016/j.jseaes.2019.104217
2-s2.0-85079071476
titleInfo:
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lang: eng
title: Temporal geochemical and geodynamic evolution of the Late Cretaceous subduction zone volcanism in the eastern Sakarya Zone NE Turkey
subTitle: Implications for mantle-crust interaction in an arc setting
abstract: The Late Cretaceous Artvin volcanic rocks (LCAVs) from the eastern Sakarya zone (ESZ) of NE Turkey are composed of mafic/basaltic (S1-Çatak and S2-Çağlayan) and felsic/acidic (S1-Kızılkaya and S2-Tirebolu) rock types that occurred in two successive stages: (i) first stage (S1: Turonian–Early Santonian) and (ii) second stage (S2: Late Santonian–Campanian). Clinopyroxene thermobarometric results point that the S2-Çağlayan basaltic rocks have crystallised at higher temperatures and under deeper crustal conditions than those of the S1-Çatak basaltic rocks.
The LCAVs show a wide compositional spectrum ranging from tholeiite to calc-alkaline/shoshonite and are typically represented by a geochemical composition resembling subduction-related arc rocks although the 87Sr/86Sr(i) (0.7044–0.7071) and ɛNd(i) values (−0.63 to + 3.47) as well as 206Pb/204Pb(i) (18.07–18.56) 207Pb/204Pb(i) (15.57–15.62) and 208Pb/204Pb(i) (37.12–38.55) ratios show very limited variation. The parent magmas of the S1-Çatak and S2-Çağlayan mafic volcanic rocks were derived from underplated basaltic melts that originated by partial melting of metasomatised spinel lherzolite and spinel-garnet lherzolite respectively. It is proposed that the compositions of the S1-Kızılkaya (mainly dacitic) and S2-Tirebolu (rhyolitic to trachytic) felsic rocks were particularly controlled by metasomatised mantle–crust interaction and MASH zone + shallow crustal fractionation processes. Our data together with data from previous studies suggest that the S1- and S2-mafic and felsic rocks of the LCAVs (~95–75 Ma) are the products of two-stage volcanic event that took place during the northward subduction of the northern Neotethys Ocean (NNO).
subject:
@attributes:
lang: eng
authority: uka.se
topic:
Natural Sciences
Earth and Related Environmental Sciences
Geochemistry
@attributes:
lang: swe
authority: uka.se
topic:
Naturvetenskap
Geovetenskap och miljövetenskap
Geokemi
@attributes:
lang: eng
topic: Late Cretaceous
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lang: eng
topic: Subduction
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lang: eng
topic: Volcanism
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lang: eng
topic: Mantle–crust interaction
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lang: eng
topic: Sakarya Zone
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lang: eng
topic: Eastern Pontides
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lang: eng
topic: NE Turkey
@attributes:
lang: eng
authority: ltu
topic: Applied Geochemistry
genre: Research subject
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lang: swe
authority: ltu
topic: Tillämpad geokemi
genre: Research subject
language:
languageTerm: eng
genre:
publication/journal-article
ref
note:
Published
10
Validerad;2020;Nivå 2;2020-02-26 (alebob)
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Aydin
Faruk
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affiliation: Karadeniz Technical University Department of Geological Engineering
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Saka
Simge Oguz
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Sen
Cüneyt
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Dokuz
Abdurrahman
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Thomas
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Luleå tekniska universitet
Geovetenskap och miljöteknik
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Uysal
Ibrahim
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Kandemir
Raif
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affiliation: Recep Tayyip Erdoğan University Department of Geological Engineering
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Karsli
Orhan
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affiliation: Recep Tayyip Erdoğan University Department of Geological Engineering
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Sari
Bilal
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affiliation: Dokuz Eylül University Department of Geological Engineering
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affiliation: Karadeniz Technical University Department of Geological Engineering
originInfo:
dateIssued: 2020
publisher: Elsevier
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titleInfo:
title: Journal of Asian Earth Sciences
identifier:
1367-9120
1878-5786
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type: volume
number: 192
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type: artNo
number: 104217
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