Triassic-Jurassic arc magmatism in the Pontides as revealed by the U-Pb detrital zircon ages in the Jurassic sandstones of northeastern Turkey

Remziye AKDOĞAN; Aral İ. OKAY; İstván DUNKL

Makale detayları

Triassic-Jurassic arc magmatism in the Pontides as revealed by the U-Pb detrital zircon ages in the Jurassic sandstones of northeastern Turkey

Yazarlar:

Remziye AKDOĞAN | Aral İ. OKAY | İstván DUNKL

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Earth Sciences 2018 Vol.27 Issue 2, pp.89-109

Belge Tipi:

Makale

Yayın Tarihi:

3/2018

Belge Dili:

İngilizce

Document ID (Org No.):

2000731171

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

The Eastern Pontides were located at the southern active margin of 
Laurasia during Mesozoic time. Jurassic volcaniclastic sediments and 
volcanic rocks of the Pontides represent products of the arc magmatism 
above a north-dipping subduction zone. Despite the wide distribution of 
the Jurassic volcaniclastic/volcanic succession, the precise age of the 
Jurassic volcaniclastic sequence and that of the synsedimentary 
magmatism are poorly constrained. Here we present U-Pb detrital zircon 
ages from two Jurassic sandstones belonging to the Şenköy Formation of 
the Eastern Pontides. One sample is taken from the base of the Şenköy 
Formation unconformably overlying the late Carboniferous Gümüşhane 
granite. The depositional age of this sandstone is constrained as late 
Sinemurian-Pliensbachian based on the faunal assemblage of the overlying
 Ammonitico Rosso type carbonates. Detrital zircon grains from this 
sample yielded an unexpected component of 203.4 ± 0.2 Ma (Latest 
Triassic, Rhaetian) U-Pb age, indicating the existence of Late Triassic 
magmatic activity in the region that has not been reported yet from the 
exposed magmatic bodies or from the detrital zircon ages. The sample 
taken from the upper part of the Jurassic succession yielded a youngest 
U-Pb age component of 155.9 ± 1.8 Ma, indicating that the depositional 
age of the Jurassic volcaniclastic succession extends from the Early 
Jurassic (Sinemurian), as revealed by the fossil content and abundant 
U-Pb detrital zircon ages, to the Late Jurassic 
(Oxfordian-Kimmeridgian). The detrital zircon ages from this study 
together with those from the literature indicate arc magmatism on the 
southern margin of Laurasia during the Triassic and Late Jurassic 
(250-156 Ma).

Makale detayları

Triassic-Jurassic arc magmatism in the Pontides as revealed by the U-Pb detrital zircon ages in the Jurassic sandstones of northeastern Turkey

Yazarlar: Remziye AKDOĞAN | Aral İ. OKAY | İstván DUNKL

Yayıncı: TUBITAK

Ana Başlıklar: Uygulamalı fizik

Dergi: Turkish Journal of Earth Sciences 2018 Vol.27 Issue 2, pp.89-109

Belge Tipi: Makale

Yayın Tarihi: 3/2018

Belge Dili: İngilizce

Document ID (Org No.): 2000731171

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

Remziye AKDOĞAN | Aral İ. OKAY | İstván DUNKL

Yayıncı:

TUBITAK

Ana Başlıklar:

Uygulamalı fizik

Dergi:

Turkish Journal of Earth Sciences 2018 Vol.27 Issue 2, pp.89-109

Belge Tipi:

Makale

Yayın Tarihi:

3/2018

Belge Dili:

İngilizce

Document ID (Org No.):

2000731171

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985