Petrology of the Kurancali phlogopitic metagabbro: An island arc-type ophiolitic sliver in the Central Anatolian Crystalline Complex

Toksoy-Koksal F., Goncuoglu M., Yaliniz M.

INTERNATIONAL GEOLOGY REVIEW, vol.43, no.7, pp.624-639, 2001 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 43 Issue: 7
  • Publication Date: 2001
  • Doi Number: 10.1080/00206810109465037
  • Journal Name: INTERNATIONAL GEOLOGY REVIEW
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.624-639
  • Middle East Technical University Affiliated: Yes

Abstract

The Kurancali metagabbro occurs as an isolated body in the central part of the Central Anatolian Crystalline Complex. It has been emplaced along a steep S-vergent thrust-plane onto the uppermost units of the Central Anatolian Metamorphics. The main body of the Kurancali metagabbro is characterized by distinct compositional layering. The layered gabbros comprise pyroxene and hornblende gabbros. Phlogopite-rich, plagioclase-hornblende gabbro occurs mainly as pegmatitic dikes intruding the layered gabbro sequence. The layered gabbros, in general, consist mainly of diopsidic augites, brown hornblendes, and plagioclase. Secondary phases are phlogopitic mica, brownish-green hornblende replacing clinopyroxenes, and fibrous, greenish actinolitic hornblende partially or completely replacing brown homblende. The primary dark micas are phlogopitic in the range of phlogopite((57-70)) and annite((30-43)). The analyzed pyroxenes are diopsidic (En(32)Fs(19)Wo(49)En(35)Fs(18)Wo(48)).