Late Middle Jurassic (Late Bathonian-early Callovian) radiolarian cherts from the Neotethyan Bornova flysch zone, Spil Mountains, Western Turkey

TEKİN U. K., GÖNCÜOĞLU M. C.

STRATIGRAPHY AND GEOLOGICAL CORRELATION, vol.17, no.3, pp.298-308, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 3
  • Publication Date: 2009
  • Doi Number: 10.1134/s086959380903006x
  • Journal Name: STRATIGRAPHY AND GEOLOGICAL CORRELATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.298-308
  • Keywords: Melange, Middle Jurassic, Neotethys, radiolarians, W Turkey, SEDIMENTARY COVER, BASIC EXTRUSIVES, CENTRAL SAKARYA, EVOLUTION, BIOSTRATIGRAPHY, GEOCHEMISTRY, OPHIOLITES, BRANCH, GREECE, ROCKS
  • Middle East Technical University Affiliated: Yes

Abstract

Alternating radiolarian cherts and mudstones associated with basaltic lavas occur in a olistolith within the Late Cretaceous Bornova Flysch in W Anatolia. Cherts yielded diverse and moderately preserved, Nassellaria-dominated radiolarian faunas of late Bathonian-early Callovian age. Associated volcanic rocks are geochemically classified as remnants of oceanic seamounts. This is so far the first late Middle Jurassic age from the crust of the Neotethyan Izmir-Ankara Ocean in W Anatolia, and suggests that its spreading started earlier. Similar ages were reported from the Vardar and Meliata-Hallstadt Tethyan oceanic branches in Greece and Serbia, which also opened in Late Triassic but closed earlier.