Late Cenozoic stress states around the Bolu Basin along the North Anatolian Fault, NW Turkey

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dc.authoridKavak, Kaan/0000-0002-8216-5890
dc.contributor.authorOzden, Suha
dc.contributor.authorOver, Semir
dc.contributor.authorKavak, Kaan Sevki
dc.contributor.authorInal, Serife Sevinc
dc.date.accessioned2024-09-18T20:20:03Z
dc.date.available2024-09-18T20:20:03Z
dc.date.issued2008
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractThis study defines the Late Cenozoic stress regimes acting around the Bolu Basin along the North Anatolian Fault in northwestern Turkey. The inferred regional stress regime, obtained from the inversion of measured fault-slip vectors as well as focal mechanism solutions, is significant and induces the right-lateral displacement of the North Anatolian Fault. The field observations have also revealed extensional structures in and around the Bolu Basin. These extensional structures can be interpreted as either a local effect of the regional trainstensional stress regime or as the result of the interaction of the fault geometries of the dextral Duzce Fault and the southern escarpment of the North Anatolian Fault, bordering the Bolu Basin in the north and in the south, respectively. The inversion of slip vectors measured on fault planes indicates that a strike-slip stress regime with consistent NW- and NE-trencling sigma(Hmax) (sigma(1)) and sigma(Hmin) (sigma(3)) axes is dominant. Stress ratio (R) values provided by inversion of slip vectors measured on both major and minor faults and field observations show significant variations of principal stress magnitudes within the strike-slip stress regime resulting in older transpression to younger transtension. These two stress states, producing dextral displacement along NAF, are coaxial with a consistent NE-trending sigma(3) axis. The earthquake focal mechanism inversions confirm that the transtensional stress regime has continued into recent times, having identical horizontal stress axis directions, characterized by NW and NE-trencling sigma(1) and sigma(3) axes, respectively. A locally consistent NE-trending extensional, normal faulting regime is also seen in the Bolu Basin. The stress-tensor change within the strike-slip stress regime can be explained by variations in horizontal stress magnitudes that probably occurred in Quaternary times as a result of the westward extrusion of the Anatolian block. (C) 2008 Elsevier Ltd. All rights reserved.en_US
dc.identifier.doi10.1016/j.jog.2008.04.004
dc.identifier.endpage62en_US
dc.identifier.issn0264-3707
dc.identifier.issue1-2en_US
dc.identifier.scopus2-s2.0-46249124280en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage48en_US
dc.identifier.urihttps://doi.org/10.1016/j.jog.2008.04.004
dc.identifier.urihttps://hdl.handle.net/20.500.12483/10029
dc.identifier.volume46en_US
dc.identifier.wosWOS:000258051900005en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPergamon-Elsevier Science Ltden_US
dc.relation.ispartofJournal of Geodynamicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectfault-slip vectoren_US
dc.subjectinversionen_US
dc.subjectLate Cenozoicen_US
dc.subjectstress statesen_US
dc.subjecttranstensionalen_US
dc.subjectBolu Basinen_US
dc.subjectNorth Anatolian Faulten_US
dc.titleLate Cenozoic stress states around the Bolu Basin along the North Anatolian Fault, NW Turkeyen_US
dc.typeArticleen_US

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