Dating subduction events in East Anatolia, Turkey

CANDAN, Osman; OKAY, Aral I.; OBERHANSLI, Roland; BOUSQUET, Romain

Dating subduction events in East Anatolia, Turkey

Roland OBERHANSLI, (Potsdam University, Institute of Earth- & Environmental Sciences, Germany)

Romain BOUSQUET, (Potsdam University, Institute of Earth- & Environmental Sciences, Germany)

Osman CANDAN, (Dokuz Eylül Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, İzmir, Türkiye)

Aral I. OKAY (İstanbul Teknik Üniversitesi, Avrasya Yer Bilimleri Enstitüsü, İstanbul, Türkiye)

Turkish Journal of Earth Sciences

2 0

Yıl: 2012 Cilt: 21 Sayı: 1 Sayfa Aralığı: 1 - 17 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

Dating subduction events in East Anatolia, Turkey

Öz:

Özet: Bitlis Kompleksi’nin örtü serilerinde gerçekleştirilen indeks minerallere dayalı metamorfi zma çalışması Masif ’in termal evriminin ortaya konmasını mümkün kılmıştır. İyi korunmuş glaukofan ve karfolitin yanı sıra kloritoid içeren şistlerdeki karfolit kalıntıları ve mermerlerde aragonitten dönüşme kalsitin varlığı DS–YB koşullarındaki bir metamorfi zmayı tanımlamaktadır. Bu bulgular, Bitlis Kompleksi’nin Neo-Tetis’in kapanması sırasında yitim zonunda derin gömülmeye uğrayarak nap yığını yapısı kazandığını göstermektedir. Petrolojik verilere dayanarak, Geç Kretase– Senozoyik zaman aralığında Bitlis Kompleksi’nde söz konusu metamorfi zmanın zirve koşulları 350–400°C sıcaklık ve 1.0–1.1 GPa basınç olarak belirlenmiştir. Geri dönüşüm sürecinde ise sıcaklık 460°C nin altında kalmıştır. Farklı parajenezlerdeki beyaz mikaların 39Ar/40Ar yöntemiyle yaşlandırılmasına dayalı olarak, Bitlis Kompleksi’ndeki metamorfi zmanın zirve koşullarının yaşı 74–79 My (Kampaniyen) olarak belirlenmiştir. Yaklaşık eş sıcaklık koşullarında hızlı yüzeylemeyi tanımlayan yeşilşist üzerlemesinin yaşı ise 67–70 My (Maastihtiyen) dır. YB Eosen filişi yeşilşist fasiyesi üzerlemesinden kaçmış ve çok soğuk koşullarda yüzeylemiştir. Bu tek aşamalı evrimler, daha kuzeyde, Ermenistan’da Amassia-Stepanavan kenetinde belirlenen çok evreli gelişimle uyuşmamaktadır. Petrolojik araştırmalar ve izotopik yaş verileri, Arabistan levhası ile Avrasya’nın çarpışmasının kuzey ve güneyden türeyen farklı blokların bir araya gelmesine neden olduğunu ve bu süreç içerisinde farklı yüzeyleme tarihçelerine sahip YB metamorfi zması kayaları türeten bir dizi yitim zonunun geliştiğini göstermektedir.

Anahtar Kelime:

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	OBERHANSLI R, BOUSQUET R, CANDAN O, OKAY A (2012). Dating subduction events in East Anatolia, Turkey. , 1 - 17.
Chicago	OBERHANSLI Roland,BOUSQUET Romain,CANDAN Osman,OKAY Aral I. Dating subduction events in East Anatolia, Turkey. (2012): 1 - 17.
MLA	OBERHANSLI Roland,BOUSQUET Romain,CANDAN Osman,OKAY Aral I. Dating subduction events in East Anatolia, Turkey. , 2012, ss.1 - 17.
AMA	OBERHANSLI R,BOUSQUET R,CANDAN O,OKAY A Dating subduction events in East Anatolia, Turkey. . 2012; 1 - 17.
Vancouver	OBERHANSLI R,BOUSQUET R,CANDAN O,OKAY A Dating subduction events in East Anatolia, Turkey. . 2012; 1 - 17.
IEEE	OBERHANSLI R,BOUSQUET R,CANDAN O,OKAY A "Dating subduction events in East Anatolia, Turkey." , ss.1 - 17, 2012.
ISNAD	OBERHANSLI, Roland vd. "Dating subduction events in East Anatolia, Turkey". (2012), 1-17.

APA	OBERHANSLI R, BOUSQUET R, CANDAN O, OKAY A (2012). Dating subduction events in East Anatolia, Turkey. Turkish Journal of Earth Sciences, 21(1), 1 - 17.
Chicago	OBERHANSLI Roland,BOUSQUET Romain,CANDAN Osman,OKAY Aral I. Dating subduction events in East Anatolia, Turkey. Turkish Journal of Earth Sciences 21, no.1 (2012): 1 - 17.
MLA	OBERHANSLI Roland,BOUSQUET Romain,CANDAN Osman,OKAY Aral I. Dating subduction events in East Anatolia, Turkey. Turkish Journal of Earth Sciences, vol.21, no.1, 2012, ss.1 - 17.
AMA	OBERHANSLI R,BOUSQUET R,CANDAN O,OKAY A Dating subduction events in East Anatolia, Turkey. Turkish Journal of Earth Sciences. 2012; 21(1): 1 - 17.
Vancouver	OBERHANSLI R,BOUSQUET R,CANDAN O,OKAY A Dating subduction events in East Anatolia, Turkey. Turkish Journal of Earth Sciences. 2012; 21(1): 1 - 17.
IEEE	OBERHANSLI R,BOUSQUET R,CANDAN O,OKAY A "Dating subduction events in East Anatolia, Turkey." Turkish Journal of Earth Sciences, 21, ss.1 - 17, 2012.
ISNAD	OBERHANSLI, Roland vd. "Dating subduction events in East Anatolia, Turkey". Turkish Journal of Earth Sciences 21/1 (2012), 1-17.