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


ÖZDEN S., Over S., KAVAK K. Ş. , INAL S. S.

JOURNAL OF GEODYNAMICS, vol.46, pp.48-62, 2008 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 46
  • Publication Date: 2008
  • Doi Number: 10.1016/j.jog.2008.04.004
  • Journal Name: JOURNAL OF GEODYNAMICS
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.48-62
  • Keywords: fault-slip vector, inversion, Late Cenozoic, stress states, transtensional, Bolu Basin, North Anatolian Fault, TERTIARY VOLCANISM, SLIP DISTRIBUTION, FOCAL MECHANISM, AEGEAN ARC, 1999 IZMIT, ZONE, EARTHQUAKE, EVOLUTION, WESTERN, KINEMATICS

Abstract

This 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.