Evidence for two episodes of volcanism in the Bigadic borate basin and tectonic implications for western Turkey

Erkul F., Helvaci C., SÖZBİLİR H.

GEOLOGICAL JOURNAL, vol.40, no.5, pp.545-570, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Review
  • Volume: 40 Issue: 5
  • Publication Date: 2005
  • Doi Number: 10.1002/gj.1026
  • Journal Name: GEOLOGICAL JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.545-570
  • Keywords: stratigraphy, structural geology, geochemistry, Lower Miocene, volcano-sedimentary succession, Bigadic borate basin, western Turkey, SOUTHERN MENDERES MASSIF, HIGH-PRESSURE METAMORPHISM, GEDIZ GRABEN, KARAKAYA COMPLEX, GEOCHEMICAL DISCRIMINATION, BIMODAL VOLCANISM, 2-STAGE EXTENSION, MAGMATIC COMPLEX, ALASEHIR GRABEN, TRENDING BASINS
  • Dokuz Eylül University Affiliated: Yes

Abstract

Western Turkey has been dominated by N-S extension since the Early Miocene. The timing and cause of this N-S extension and related basin formation have been the subject of much debate, but new data from the Bigadic borate basin provide insights that may solve this controversy. The basin is located in the Bornova Flysch Zone, which is thought to have formed as a major NE-trending transform zone during Late Cretaceous-Palaeocene collisional Tethyan orogenesis and later reactivated as a transfer zone of weakness, and which separates two orogenic domains having different structural evolutions.