Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey

TEMİZEL, İrfan; ARSLAN, Mehmet

Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey

İrfan TEMİZEL, (Karadeniz Teknik Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, Trabzon, Türkiye)

Mehmet ARSLAN (Karadeniz Teknik Üniversitesi, Mühendislik Fakültesi, Jeoloji Mühendisliği Bölümü, Trabzon, Türkiye)

Turkish Journal of Earth Sciences

7 0

Yıl: 2009 Cilt: 18 Sayı: 1 Sayfa Aralığı: 29 - 53 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey

Öz:

Eski bir adayayı olan Doğu Pontidler’in batı kısmında yer alan Ulubey (Ordu) yöresindeki çarpışma sonrası Tersiyer yaşlı volkanik kayaçlar dört takıma ayrılmıştır. Yenisayaca bazaltı plajiyoklas (An61–83), klinopiroksen $(Wo_{42-44}En_{39-41}Fs_{15-18})$ ve olivine fenokristalleri ve titanomagnetit içerirken, Çatal Tepe ve Elekçioğlu Tepe takımı (ÇES), Işık Tepe takımı ve andezit/trakiandezit takımını oluşturan kayaçlar ise plajiyoklas $(An_{23-78})$, klinopiroksen $(Wo_{27-48}En_{37-55}Fs_{11-26})$, hornblend (Mg#= 0.63–0.76), biyotit (Mg#= 0.63–0.82), sanidin fenokristalleri, titanomagnetit ve apatit içermektedir. Petrokimyasal verilere göre, kayaçlar toleyitik-alkalenden kalk-alkalene kadar değişen karaktere sahip olup, orta-yüksek-K içerirler. Örneklerin çoğunun düşük Mg-numarası ile Cr ve Ni içeriklerine sahip olması, bu kayaçların mantodan türemiş ergiyiklerden itibaren önemli derecede ayrımlaşmaya uğradıklarını göstermektedir. Harker diyagramlarına göre, Yenisayaca bazaltı’nda klinopiroksen ± plajiyoklas ± magnetit ayrımlaşması, Çatal Tepe ve Elekçioğlu Tepe takımı (ÇES), Işık Tepe takımı ve andezit/trakiandezit takımını oluşturan kayaçlarda ise hornblend + biyotit + plajiyoklas ± magnetit ± apatit ± sanidin ayrımlaşması etkili olmuştur. Ulubey (Ordu) yöresi volkanitlerinin N-tipi Okyanus Ortası Sırtı Bazaltı (N-Type MORB)’na normalize edilmiş iz element dağılımlarına göre, Ulubey yöresi volkanik kayaçları özellikle büyük iyon yarıçaplı litofil element ve daha az oranda Th ve Ce konsantrasyonları bakımından zenginleşme, fakat Zr, Y ve TiO2 konsantrasyonları bakımından tüketilme göstermektedirler. Buna ilaveten, kayaçların büyük iyon yarıçaplı litofil elementlere kıyasla azalan Nb ve Ta içerikleri, orta derecede HNTE (hafif nadir toprak element) /ANTE (ağır nadir toprak element) oranları ve yüksek Th/Yb oranları; volkanitlerin köken magmasının muhtemelen daha önceden akışkanlar tarafından metazomatizmaya uğratılmış zenginleşmiş bir kaynak bölgeden (muhtemelen litosferik manto) türeyebileceklerini ifade etmektedir. C1-kondrite normalize edilmiş nadir toprak element dağılımları, düşük-orta derecede zenginleşmeyle konkav şekilli olup, Yenisayaca Bazaltı ile Çatal Tepe ve Elekçioğlu Tepe takımı (ÇES), Işık Tepe takımı ve andezit/trakiandezit takımını oluşturan kayaçların benzer kaynaklardan itibaren oluştuğunu düşündürmektedir. Nadir toprak element dağılımlarında gözlenen negatif Eu anomalisi, kayaçların gelişiminde plajiyoklas ayrımlaşmasının etkili olabileceğini göstermektedir.

Anahtar Kelime:

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

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APA	TEMİZEL İ, ARSLAN M (2009). Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. , 29 - 53.
Chicago	TEMİZEL İrfan,ARSLAN Mehmet Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. (2009): 29 - 53.
MLA	TEMİZEL İrfan,ARSLAN Mehmet Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. , 2009, ss.29 - 53.
AMA	TEMİZEL İ,ARSLAN M Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. . 2009; 29 - 53.
Vancouver	TEMİZEL İ,ARSLAN M Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. . 2009; 29 - 53.
IEEE	TEMİZEL İ,ARSLAN M "Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey." , ss.29 - 53, 2009.
ISNAD	TEMİZEL, İrfan - ARSLAN, Mehmet. "Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey". (2009), 29-53.

APA	TEMİZEL İ, ARSLAN M (2009). Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. Turkish Journal of Earth Sciences, 18(1), 29 - 53.
Chicago	TEMİZEL İrfan,ARSLAN Mehmet Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. Turkish Journal of Earth Sciences 18, no.1 (2009): 29 - 53.
MLA	TEMİZEL İrfan,ARSLAN Mehmet Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. Turkish Journal of Earth Sciences, vol.18, no.1, 2009, ss.29 - 53.
AMA	TEMİZEL İ,ARSLAN M Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. Turkish Journal of Earth Sciences. 2009; 18(1): 29 - 53.
Vancouver	TEMİZEL İ,ARSLAN M Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey. Turkish Journal of Earth Sciences. 2009; 18(1): 29 - 53.
IEEE	TEMİZEL İ,ARSLAN M "Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey." Turkish Journal of Earth Sciences, 18, ss.29 - 53, 2009.
ISNAD	TEMİZEL, İrfan - ARSLAN, Mehmet. "Mineral chemistry and petrochemistry of post-collisional tertiary mafic to felsic cogenetic volcanics in the Ulubey (Ordu) area, Eastern Pontides, NE Turkey". Turkish Journal of Earth Sciences 18/1 (2009), 29-53.