Petrochemistry of the Oyaca-Kedikayasi (Ankara) dacites as evidence for the post-collisional tectonic evolution of north-central Anatolia, Turkey

Bozkurt, ERDİN; Kocyigit, A; Winchester, JA; Holland, G; Beyhan, A

doi:10.1002/(sici)1099-1034(199907/09)34:3<223::aid-gj823>3.0.co;2-b

Petrochemistry of the Oyaca-Kedikayasi (Ankara) dacites as evidence for the post-collisional tectonic evolution of north-central Anatolia, Turkey

Bozkurt E., Kocyigit A., Winchester J., Holland G., Beyhan A.

GEOLOGICAL JOURNAL, cilt.34, sa.3, ss.223-231, 1999 (SCI-Expanded, Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 34 Sayı: 3
Basım Tarihi: 1999
Doi Numarası: 10.1002/(sici)1099-1034(199907/09)34:3<223::aid-gj823>3.0.co;2-b
Dergi Adı: GEOLOGICAL JOURNAL
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.223-231
Anahtar Kelimeler: Ankara, central Anatolia, Turkey, dacites, post-collisional, DISCRIMINATION, ROCKS
Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

The Lower Miocene Oyaca and Kedikayasi dacite stocks, unconformably overlain by Plio-Quaternary sedimentary and volcanic rocks, intrude a southward-verging imbricate thrust zone within the izmir-Ankara-Erzincan Suture Zone (IAESZ), approximately 50 km SW of Ankara. These stocks crop out as two petrographically distinguishable plagioclase, hornblende and biotite-phyric dacites. Xenoliths petrographically similar to the Kedikayasi dacite occur within the Oyaca stock, suggesting that the Kedikayasi stock is older; if so, the venting from the magma chamber may have removed the upper, more evolved magma first.