U-Pb zircon geochronology of northern metamorphic massifs in the Biga Peninsula (NW Anatolia-Turkey): new data and a new approach to understand the tectonostratigraphy of the region

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dc.authoridTunc, I. Onur/0000-0002-4273-9175
dc.contributor.authorTunc, Ismail Onur
dc.contributor.authorYiğitbaş, Erdinç
dc.contributor.authorSengun, Firat
dc.contributor.authorWazeck, Jana
dc.contributor.authorHofmann, Mandy
dc.contributor.authorLinnemann, Ulf
dc.date.accessioned2025-01-27T20:47:44Z
dc.date.available2025-01-27T20:47:44Z
dc.date.issued2012
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractMetamorphic massifs of the Biga Peninsula can be divided into two approximately ENE-WSW-trending belts. It is believed that these two belts represent two different tectonic zones separated by a NE-trending Alpine ophiolitic suture. The Sakarya Zone lies to the S-SE of this Alpine suture, and consists of the Kazdag metamorphic complex which is tectonically overlain by the Permo-Triassic Karakaya Complex. The metamorphic rocks, as an Alpine edifice located N-NW of the suture, have been assigned to the Rhodope and Serbo-Macedonian massifs of Bulgaria and Greece. The northern metamorphic belt is represented by the Karadag Massif in the west, which has been evaluated as a different unit from the others, the Karabiga Massif in the east and the Camlica Massif between them. All three massifs are mapped in detail in light of previous studies and LA-ICP-MS U-Pb zircon dating was applied to stratigraphically compare them. Contrary to previous studies, our data indicate that the basement metamorphic associations in these three areas show similar characteristics concerning their stratigraphical and lithological aspects and also spatial distribution of their outcrops. U-Pb LA-ICP-MS dating of zircons from the three individual metamorphic massifs yielded the following data: maximum sedimentation ages of the protolith of mica schists in the range of 559 +/- 17 to 582 +/- 30 Ma; crystallisation age of the protolith of metavolcanic rocks of 577 +/- 20 Ma; and crystallisation age of the protolith of eclogites at 565 +/- 9 Ma. These ages clearly show that the metamorphic units of the northern massifs are comparable to each other. Also, the U-Pb zircon concordia diagrams from these three metamorphic massifs show remarkably similar patterns. In addition to the similar maximum sedimentation ages for all mica schists with crystallisation ages of the protoliths of the metabasic rocks, there are two major complex tectono-thermal overprints (episodic lead loss events), at c. 330-300 Ma (Variscan?) and c. 100-10 Ma (Alpine and late Alpine?), respectively. Field mapping and analytical data indicate that the basement rocks of the northern massifs in the Biga Peninsula have a correlative Late Ediacaran to Early Cambrian stratigraphic range. In part, Permian strata unconformably overlie basement rocks in the Karadag Massif. Both tectono-thermal events are demonstrated by coeval episodic lead loss of many zircons in all samples from all areas. Finally, the results of this research do not support an Alpine suture between the two metamorphic belts of the Biga Peninsula. Therefore, the geological evolution of the region might require reevaluation.
dc.description.sponsorshipTUBITAK [110Y281]
dc.description.sponsorshipThis paper is a part of the first author's PhD work, under the supervision of Prof. Dr. Erdinc Yigitbas. The authors are grateful to TUBITAK for the financial support to grant 110Y281. We would like to thank to Prof. Dr. Erdin Bozkurt whom joined us on couple of field excursions and participated in valuable discussions. We are also grateful to Prof. Dr. Osman Candan and the anonymous reviewers for their valuable comments and suggestions. We also acknowledge Catherine Yigit for proofreading.
dc.identifier.doi10.1080/09853111.2013.877242
dc.identifier.endpage225
dc.identifier.issn0985-3111
dc.identifier.issn1778-3593
dc.identifier.issue3-4
dc.identifier.scopus2-s2.0-84902864666
dc.identifier.scopusqualityN/A
dc.identifier.startpage202
dc.identifier.urihttps://doi.org/10.1080/09853111.2013.877242
dc.identifier.urihttps://hdl.handle.net/20.500.12428/25025
dc.identifier.volume25
dc.identifier.wosWOS:000208975400008
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherTaylor & Francis Ltd
dc.relation.ispartofGeodinamica Acta
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectU-Pb zircon dating
dc.subjectEdiacaran-Cambrian basement
dc.subjectSakarya Zone
dc.subjectBiga Peninsula
dc.subjectTurkey
dc.titleU-Pb zircon geochronology of northern metamorphic massifs in the Biga Peninsula (NW Anatolia-Turkey): new data and a new approach to understand the tectonostratigraphy of the region
dc.typeArticle

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