Jurassic Volcanism in the Eastern Pontides: Is it Rift Related or Subduction Related?

Cüneyt ŞEN

Makale detayları

Jurassic Volcanism in the Eastern Pontides: Is it Rift Related or Subduction Related?

Yazarlar:

Cüneyt ŞEN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2007 Vol.16 Issue 4, pp.523-539

Belge Tipi:

Makale

Yayın Tarihi:

3/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000732595

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

The Jurassic volcanic rocks in the centre of the northern zone (south of Trabzon City) provide important constraints on the evolution of Pontides. The investigated volcanic rocks form a transitional series between tholeiitic and calc-alkaline, and is dominated by basalt, basaltic andesite and andesite. Geochemically, they are enriched in LILE and LREE contents and depleted in HFSE [(La/Yb)N= 2.2 - 8.5; (Nb/La)N= 0.1 - 0.77)] compared to mid-ocean ridge basalts and have radiogenic Nd isotope ratios of eNd(210 Ma)= -0.72 to 3.24. These trace element and isotope data suggest that these rocks were derived from low degrees of partial melting of spinel lherzolite that was metasomatized by subduction-related fluids and further underwent a degree of fractional crystallization in magma chambers before being extruded at the surface.

 

The Jurassic volcanic rocks in the centre of the northern zone (south of Trabzon City) provide important constraints on the evolution of Pontides. The investigated volcanic rocks form a transitional series between tholeiitic and calc-alkaline, and is dominated by basalt, basaltic andesite and andesite. Geochemically, they are enriched in LILE and LREE contents and depleted in HFSE [(La/Yb)N= 2.2 - 8.5; (Nb/La)N= 0.1 - 0.77)] compared to mid-ocean ridge basalts and have radiogenic Nd isotope ratios of eNd(210 Ma)= -0.72 to 3.24. These trace element and isotope data suggest that these rocks were derived from low degrees of partial melting of spinel lherzolite that was metasomatized by subduction-related fluids and further underwent a degree of fractional crystallization in magma chambers before being extruded at the surface.

Makale detayları

Jurassic Volcanism in the Eastern Pontides: Is it Rift Related or Subduction Related?

Yazarlar: Cüneyt ŞEN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Earth Sciences 2007 Vol.16 Issue 4, pp.523-539

Belge Tipi: Makale

Yayın Tarihi: 3/2007

Belge Dili: Türkçe

Document ID (Org No.): 2000732595

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

Cüneyt ŞEN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2007 Vol.16 Issue 4, pp.523-539

Belge Tipi:

Makale

Yayın Tarihi:

3/2007

Belge Dili:

Türkçe

Document ID (Org No.):

2000732595

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985