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Silurian anorogenic basic and acidic magmatism in Northwest Turkey: Implications for the opening of the Paleo-Tethys
Topuz, Gultekin1; Candan, Osman2; Okay, Aral, I1; von Quadt, Albrecht3; Othman, Malik4; Zack, Thomas5,6; Wang, Jiamin7
2020-03-01
Source PublicationLITHOS
ISSN0024-4937
Volume356Pages:14
AbstractThe Sakarya Zone (northern Turkey) is a Gondwana-derived continental block accreted to northern Laurussia during the Carboniferous, and is regarded as the eastward extension of Armorica. Timing of its detachment from the northern margin of Gondwana, thus opening of the Paleo-Tethys, is poorly known. Here, we report on metagranite and amphibolite with Silurian igneous crystallization ages from the Early Carboniferous high-temperature/middle to low-pressure amphibolite-facies metamorphic rocks of the Sancakaya Massif within the Sakarya Zone (NW Turkey). The metagranite-amphibolite complex is exposed mainly along the southern margin of the Sancakaya Massif over an area of ca. 12 km by 15 km. The metagranite contains preserved domains of porphyric texture, indicative of derivation from a former granite porphyry. The amphibolite is devoid of any relict igneous texture. Both the metagranite and amphibolite are crosscut by late up to 50 cm thick felsic veins. Uranium-Pb dating on igneous zircons from both metagranite and amphibolite yielded Silurian ages of ca. 419 +/- 6 to 434 +/- 7 Ma (2 sigma), and on those from a felsic vein an age of 319 +/- 5 Ma (2 sigma) (Late Carboniferous). Geochemically, amphibolite displays anorogenic transitional tholeiitic to alkaline signatures. Initial cHf values of the igneous zircons from both metagranite and amphibolite show a large variation with medial values of -16 to -9 and + 3 to +6, respectively. Thus, the protoliths of amphibolite were derived from melts of depleted mantle, and those of the metagranite, on the other hand, from melts of reworked crustal material. We suggest that the Silurian anorogenic magmatism is related to a rifting event at the northern margin of Gondwana leading to the detachment of the Sakarya Zone and hence placing an age on the initial opening of the Paleo-Tethys. This interpretation is based on (i) the presence of Late Silurian to Devonian deep-sea sedimentary blocks in the PaleoTethyan accretionary complexes, and (ii) the resemblance of the U-Pb age spectra of detrital zircons in the metadastic sequence of the Sancakaya Massif to those of Cambro-Ordovician sandstones in Jordan (Gondwana), and (iii) the local occurrence of anorogenic A-type granites of Late Ordovician-Silurian age in the AnatolideTauride Block, a continental block which rifted from Gondwana during the Early Triassic. Wholly anorogenic nature of the Late Ordovician to Silurian igneous rocks in the Sancakaya Massif and reported in literature does not support the opening of the Paleo-Tethys as back-arc ocean, as suggested in most paleogeographic reconstructions. (C) 2019 Elsevier B.V. All rights reserved.
KeywordU-Pb zircon dating Zircon Hf isotopes Paleo-Tethys Silurian magmatism Armorica Sakarya Zone Turkey
DOI10.1016/j.lithos.2019.105302
Funding Organizationresearch foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA) ; research foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA) ; research foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA) ; research foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA)
WOS KeywordNE TURKEY ; EASTERN PONTIDES ; SAKARYA ZONE ; NORTHEAST TURKEY ; PULUR COMPLEX ; NW TURKEY ; GRANITOID MAGMATISM ; OPHIOLITE FORMATION ; DEVONIAN MAGMATISM ; MASS-SPECTROMETRY
Language英语
Funding Projectresearch foundation of the istanbul Teknik Universitesi[8629] ; research foundation of the istanbul Teknik Universitesi[9853] ; Turkish Academy of Science (TUBA)
Funding Organizationresearch foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA) ; research foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA) ; research foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA) ; research foundation of the istanbul Teknik Universitesi ; research foundation of the istanbul Teknik Universitesi ; Turkish Academy of Science (TUBA) ; Turkish Academy of Science (TUBA)
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000520941500026
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95506
Collection岩石圈演化国家重点实验室
Corresponding AuthorTopuz, Gultekin
Affiliation1.Istanbul Tech Univ, Avrasya Yer Bilimleri Enstitusu, TR-34469 Istanbul, Turkey
2.Dokuz Eylul Univ, Jeoloji Muhendisligi Bolumu, Izmir, Turkey
3.Swiss Fed Inst Technol, Dept Earth Sci, Inst Geochem & Petrol, Clausiusstr 25, CH-8092 Zurich, Switzerland
4.Misurata Univ, Fac Sci, Geol Dept, Misurata, Libya
5.Univ Gothenburg, Dept Earth Sci, Gothenburg, Sweden
6.Univ Adelaide, Dept Earth Sci, Adelaide, SA, Australia
7.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, 19 Beitucheng West Rd, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Topuz, Gultekin,Candan, Osman,Okay, Aral, I,et al. Silurian anorogenic basic and acidic magmatism in Northwest Turkey: Implications for the opening of the Paleo-Tethys[J]. LITHOS,2020,356:14.
APA Topuz, Gultekin.,Candan, Osman.,Okay, Aral, I.,von Quadt, Albrecht.,Othman, Malik.,...&Wang, Jiamin.(2020).Silurian anorogenic basic and acidic magmatism in Northwest Turkey: Implications for the opening of the Paleo-Tethys.LITHOS,356,14.
MLA Topuz, Gultekin,et al."Silurian anorogenic basic and acidic magmatism in Northwest Turkey: Implications for the opening of the Paleo-Tethys".LITHOS 356(2020):14.
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