Mafic Volcanic and Subvolcanic Rocks from the Yüksekova Complex in the İçme-Kesikköprü Province (East of Elaziğ, Eastern Turkey): Whole-Rock Geochemistry and Confocal Raman Spectroscopy Characterization

The Late Cretaceous Yüksekova Complex within the southeastern Anatolia orogenic belt consists of mafic volcanic and subvolcanic rocks representing oceanic crustal products, which are the main focus of this study. The studied mafic lithologies from the İçme-Kesikköprü province east of Elaziğ are char...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2019-11, Vol.362 (1), p.12122
Main Authors: Ural, Melek, Deniz, Kiymet, Sayit, Kaan
Format: Article
Language:English
Subjects:
Anomalies
Basalt
Cretaceous
Earth mantle
Geochemistry
Isotopes
Lanthanum
Lava
Oceanic crust
Olivine
Orogeny
Plagioclase
Pyroxenes
Raman spectroscopy
Rare earth elements
Rocks
Systematics
Trace elements
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Summary:The Late Cretaceous Yüksekova Complex within the southeastern Anatolia orogenic belt consists of mafic volcanic and subvolcanic rocks representing oceanic crustal products, which are the main focus of this study. The studied mafic lithologies from the İçme-Kesikköprü province east of Elaziğ are characterized by a primary mineral assemblage of olivine, pyroxene, and plagioclase, and mainly display porphyric, intergranular, intersertal, vesicular, and amygdaloidal textures. Based on Raman peak positions, the pyroxenes of these mafic lithologies from Aşaği Igme, Pirimezartepe and Yolüstü were determined as augite. The studied mafic rocks are chemically classified as basalt and display tholeiitic-calc-alkaline transitional characteristics. In spider diagrams, they show prominent negative Nb anomalies, while their chondrite-normalized rare earth element patterns are LREE-depleted to almost horizontal [(La/Sm)N: 0.54-1.42, (La/Lu)N: 0.54-1.85]. The immobile trace element systematics suggests that these mafic volcanic and subvolcanic rocks have originated from a metasomatized mantle source fluxed by slab-derived fluids/melts. Overall geochemical features are consistent with their generation in an oceanic arc environment.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/362/1/012122