Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)

Parlak, Osman

Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)

Osman PARLAK (Çukurova Üniversitesi, Mühendislik Mimarlık Fakültesi, Jeoloji Mühendisliği Bölümü, Adana, Türkiye)

Turkish Journal of Earth Sciences

3 0

Yıl: 2000 Cilt: 9 Sayı: 1 Sayfa Aralığı: 29 - 38 Metin Dili: Türkçe İndeks Tarihi: 29-07-2022

Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)

Öz:

Güney Türkiye’deki Geç Kretase yaşlı okyanusal litosfer kalıntılarından olan Pozantı-Karsantı ofiyoliti doğu Toroslarda yüzeylemektedir ve ofiyolitik melanj, metamorfik dilim ve ofiyolitik kayaçlardan oluşan üç farklı bindirme diliminden meydana gelmiştir. Ofiyolitik melanj haricindeki diğer birimler değişik yapısal seviyelerde izole mikrogabro-diyabaz daykları tarafından kesilmektedirler. Kümülat kayaçları kesen dayklar subalkalen karakterde olup kimyasal olarak ada yayı toleyitik bazalt ve bazaltik andezitlere benzerlik gösterirler. Bu kayaçlar N-tipi MORB’a göre bazı LIL elementlerce (Rb, Ba, K, Sr) zenginleştirilmiş buna karşın bazı HFS elementlerce (Nb, Ti, Y) de tüketilmişlerdir. Özellikle Th ve LIL elementlerin pozitif ve Nb’un negatif anomalileri dalma-batma zonu bileşenini göstermektedir. İz element içeriklerine göre hazırlanan Tektonomagmatik diskriminasyon diyagramları daykların okyanus içi dalma-batma zonu (Suprasubduction) üzerinde oluştuğunu işaret ederler. Bütün verilerin ışığı altında Pozantı-Karsantı ofiyolitindeki kümülatları kesen izole diyabaz dayklarının ofiyolitik kayaçlarla aynı jeodinamik ortamda (okyanus içi dalma-batma zonu üzerinde) Geç Kretase sırasında Neotetis okyanusunda Torid-Anatolid platformunun kuzeyinde oluştuğu söylenebilir.

Anahtar Kelime:

Konular: Jeoloji

Pozantı-Karsantı ofiyolitlerini kesen mafik daykların jeokimyası ve önemi (Güney Türkiye)

Öz:

The Pozantı-Karsantı ophiolite, which is one of a number of the Late Cretaceous oceanic lithospheric remnants in southern Turkey, is situated in the eastern Tauride belt and consists of three distinct thrust sheets: an ophiolitic melange, a metamorphic sole, and an ophiolitic stratigraphic sequence. These units (except the ophiolitic melange) are intruded by isolated microgabbro-diabase dykes at all structural levels. The dykes from the lower crustal rocks (cumulates) are subalkaline in character and chemically similar to island arc tholeiitic basalts and basaltic andesites. They are enriched in some LIL elements (Rb, Ba, K and Sr) and depleted in HFS elements (Nb, Ti, Y) relative to N-MORB. The presence of positive Th and LIL anomalies and a negative Nb anomaly, relative to the other incompatible elements, are thought to represent a subduction zone component. Tectonomagmatic discrimination diagrams based on the immobile trace elements suggest a suprasubduction zone environment for the origin of the mafic dyke swarms. All the evidence indicates that the mafic dykes from the lower crustal rocks (cumulates) in the Pozantı-Karsantı ophiolite formed in the same geodynamic environment (suprasubduction zone) as their host rocks did in the north of Tauride-Anatolide block during Late Cretaceous in the Neo-Tethyan ocean.

Anahtar Kelime:

Konular: Jeoloji

Belge Türü: Makale Makale Türü: Diğer Erişim Türü: Erişime Açık

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APA	Parlak O (2000). Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). , 29 - 38.
Chicago	Parlak Osman Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). (2000): 29 - 38.
MLA	Parlak Osman Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). , 2000, ss.29 - 38.
AMA	Parlak O Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). . 2000; 29 - 38.
Vancouver	Parlak O Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). . 2000; 29 - 38.
IEEE	Parlak O "Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)." , ss.29 - 38, 2000.
ISNAD	Parlak, Osman. "Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)". (2000), 29-38.

APA	Parlak O (2000). Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). Turkish Journal of Earth Sciences, 9(1), 29 - 38.
Chicago	Parlak Osman Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). Turkish Journal of Earth Sciences 9, no.1 (2000): 29 - 38.
MLA	Parlak Osman Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). Turkish Journal of Earth Sciences, vol.9, no.1, 2000, ss.29 - 38.
AMA	Parlak O Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). Turkish Journal of Earth Sciences. 2000; 9(1): 29 - 38.
Vancouver	Parlak O Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey). Turkish Journal of Earth Sciences. 2000; 9(1): 29 - 38.
IEEE	Parlak O "Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)." Turkish Journal of Earth Sciences, 9, ss.29 - 38, 2000.
ISNAD	Parlak, Osman. "Geochemistry and significance of mafic dyke swarms in the Pozantı-Karsantı ophiolite (Southern Turkey)". Turkish Journal of Earth Sciences 9/1 (2000), 29-38.