Trace element geochemistry of Bitlis ignimbrites sourced by Quaternary Nemrut Volcano: inferences for A2-type magma generation in Eastern Anatolia post-collisional extensional setting

Hakan ÇOBAN; Özcan Ali KALKAN

doi:https://doi.org/10.17678/beuscitech.1021499

Makale detayları

Trace element geochemistry of Bitlis ignimbrites sourced by Quaternary Nemrut Volcano: inferences for A2-type magma generation in Eastern Anatolia post-collisional extensional setting

Yazarlar:

Hakan ÇOBAN | Özcan Ali KALKAN

Yayıncı:

Bitlis Eren University

Dergi:

Bitlis Eren University Journal of Science and Technology 2021 Vol.11 Issue 2, pp.91-96

Belge Tipi:

Makale

Yayın Tarihi:

12/2021

Belge Dili:

İngilizce

Document ID (Org No.):

2000887796

Sıklık:

İki Yıllık

eISSN:

2146-7706

DOI:

https://doi.org/10.17678/beuscitech.1021499

Özet:

 

In the study presented here, we investigated the K-Ar age determination and petrological significance of trace element compositions of Bitlis (Eastern Anatolia) ignimbrites associated with explosive activities of the well-known Nemrut volcano. K-Ar geochronological dating of Bitlis ignimbrite flow deposits gave the age of 790 ka which corresponds to the first products of pre-caldera stages of Nemrut stratovolcano. Bitlis trachydacitic ignimbrites with shoshonitic affinity are characterized by the typical negative anomalies of Eu, Nb-Ta, and Ti in chondrite-normalized spider and multi-element variation diagrams, and plot in the fields of within-plate and post-collisional tectonic setting in Rb vs Y+Nb discrimination diagram. Accordingly, similar to that of Nemrut volcanic products, trace element signatures (e.g., high Nb, Ce, Y, and Zr contents) of Bitlis ignimbrites show coincidence with geochemical characteristics of A2-type silicic magmas. Relative to the upper crust, higher La/Ba and  Nb/La, and lower Ba/Ta and La/Ta ratios of Bitlis ignimbrites, which are close to that of Nemrut basalts, suggest an interaction between OIB-like basaltic magma and upper crust. Our results point to A2-type silicic magma generation in Eastern Anatolia post-collisional extensional setting, and Nemrut volcanic and pyroclastic rocks (e.g., Bitlis ignimbrites) formed by partial melting of upper crustal rocks at shallow level via interaction with OIB-like basaltic magma derived from a common mantle source.

Makale detayları

Trace element geochemistry of Bitlis ignimbrites sourced by Quaternary Nemrut Volcano: inferences for A2-type magma generation in Eastern Anatolia post-collisional extensional setting

Yazarlar: Hakan ÇOBAN | Özcan Ali KALKAN

Yayıncı: Bitlis Eren University

Dergi: Bitlis Eren University Journal of Science and Technology 2021 Vol.11 Issue 2, pp.91-96

Belge Tipi: Makale

Yayın Tarihi: 12/2021

Belge Dili: İngilizce

Document ID (Org No.): 2000887796

Sıklık: İki Yıllık

eISSN: 2146-7706

DOI: https://doi.org/10.17678/beuscitech.1021499

Sayı

Yazarlar:

Hakan ÇOBAN | Özcan Ali KALKAN

Yayıncı:

Bitlis Eren University

Dergi:

Bitlis Eren University Journal of Science and Technology 2021 Vol.11 Issue 2, pp.91-96

Belge Tipi:

Makale

Yayın Tarihi:

12/2021

Belge Dili:

İngilizce

Document ID (Org No.):

2000887796

Sıklık:

İki Yıllık

eISSN:

2146-7706

DOI:

https://doi.org/10.17678/beuscitech.1021499