Middle Jurassic subduction-related ophiolite fragment in Triassic accretionary complex (Mamu Dagi ophiolite, Northern Turkey)


ÇELİK Ö. F. , Topuz G., Billor Z., Ozkan M.

INTERNATIONAL GEOLOGY REVIEW, vol.61, no.16, pp.2021-2035, 2019 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 61 Issue: 16
  • Publication Date: 2019
  • Doi Number: 10.1080/00206814.2019.1578109
  • Journal Name: INTERNATIONAL GEOLOGY REVIEW
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2021-2035
  • Keywords: Jurassic, ophiolite, Sr-Nd isotopes, Tethys, Tokat Massif, ERZINCAN SUTURE ZONE, METAMORPHIC SOLE ROCKS, EASTERN PONTIDES, ISLAND-ARC, TECTONIC EVOLUTION, CONTINENTAL-CRUST, ELDIVAN OPHIOLITE, ANKARA MELANGE, FACIES ROCKS, NE TURKEY
  • Istanbul Technical University Affiliated: Yes

Abstract

The Mamu Dagi ophiolite, ca. 13 km long and 5 km across (Tokat, Sakarya Zone), consists of peridotites, pyroxenites, gabbros, and basalts, which are crosscut by dolerite dykes. These rocks show variable degrees of serpentinization and alteration. Gabbroic rocks consisting of plagioclase + clinopyroxene +/- orthopyroxene +/- olivine +/- amphibole +/- sphene +/- opaque minerals have commonly the ophitic and the cumulate textures. Similar mineral paragenesis is observed in the basalts and the dolerites, which are commonly characterized by the sub-ophitic and the microlitic porphyric textures.