Güneydoğu Anadolu Sütur Kuşağında, Yüksekova Karmaşığı birimine ait volkanik kayaçların Güneyköy çevresindeki yüzlekleri bu çalışmada ele alınmıştır. Bu volkanik kayaçlar bordo ve yeşilimsi renk tonlarındadır. Kayaçlar masif görünümlü ve yer yer de belirgin yastık yapısındadır. Yer yer spilitleşmeler gösteren volkanitler bazaltik bileşimlidirler. Bazik kayaçlar genel olarak, plajiyoklas ve psödömorf olivin minerallerinden oluşmaktadırlar. Kayaçlarda, hiyalomikrolitik porfirik, amigdaloidal ve sferulitik dokular yaygındır. Kalsit, epidot oluşumları da mevcuttur. Volkanik kayaçlar bazik bileşimli ve toleyitik karakterlidir. İkili değişim diyagramlarında kayaç örnekleri hareketsiz element olarak Zr’a karşı CaO, MgO, Cr2O3 ve Sc ile negatif TiO2, P2O5, Y, Nb, Hf ve Th ile ise pozitif korelasyon göstermektedir ki, bu ilişkiler fraksiyonel kristalleşmeye işaret eder. Kayaç örneklerinin N-tipi Okyanus Ortası Sırtı Bazaltına (N-MORB) normalize edilmiş iz element dağılımları LIL Elementler bakımından MORB a göre zenginleşme, HFSE ler bakımından ise MORB çizgisine paralel fakat nisbeten fakirleşme gösterir. Örneklerin kondrite normalize edilmiş diyagramları ise kondrite göre paralel ve yaklaşık düz bir trend sergilemektedir. Negatif Nb anomalisiyle birlikte, tüketilmiş HFSE ve zenginleşmiş LIL element deseni yitim katkısına işaret etmektedir. Sonuç olarak, Güneyköy (Elazığ) çevresi volkanik kayaç örnekleri bir okyanus içi yay ortamında oluşmuşlardır.
In the south-eastern Anatolian Sütur Kuşağ, the volcanic rockets of the Yuxikova Complex unit surrounding the Sunyköy have been addressed in this study. These volcanic rocks are in borders and green colours. The rocks are massive and the ground is also in a clear ass structure. The volcanoes that show the spilations are basaltic compositions. Basic stones are generally made up of plagioclass and psödomorphic olive minerals. In the rocks, hyalomicrolite porphyric, amygdaloidal and sferulite tissues are common. There are also epithelial formations. The volcanic rockets are basically composite and toleytic characteristics. In the binary exchange diagrams, stone samples are against Zr as an unmoving element; negative with CaO, MgO, Cr2O3 and Sc; and positive correlations with TiO2, P2O5, Y, Nb, Hf and Th, which indicate fractional crystallization. The normalized trace element distribution of the N-type ocean middle back base (N-MORB) of the rock samples; the LIL elements are enriched according to MORB and the HFSE are parallel to the MORB line but relatively poor. The condrite normalized diagrams of the examples show a parallel and approximately flat trend according to the condrite. With negative Nb anomaly, consumed HFSE and enriched LIL element design indicate the contribution to loss. As a result, volcanic rock samples surrounding the South (Elazığ) formed in an ocean-in-air foam environment.
Some of the volcanic products of the Yüksekova Complex crop out in the Güneyköy (SE Elazığ, E Turkey) area in the Southeast Anatolian Suture Belt. This study reports the whole rock geochemical data of the volcanics of the Upper Cretaceous Yüksekova Complex around Güneyköy. The volcanic rocks are burgundy and greenish in color. The rocks are massive or have distinct pillow structure. The volcanic rocks occasionally showing spilitization have basaltic composition and tholeiitic character. The rocks are mainly composed of plagioclases and to a lesser extent clinopyroxene and pseudomorphic olivine minerals. In thin-sections microlytic and hyalomicrolytic porphyritic textures, as well as spherulitic and amygdaloidal textures are common. The secondary minerals are calcite and epidote. In binary diagrams, the Zr, is considered as immobile and index element; show positive correlation with Al2O3, TiO2, Nb, Y, Hf, whereas show negative correlation with CaO showing plagioclase, clinopyroxene, olivine and Fe-Ti oxide fractionation during the evolution of the volcanics. N-type mid-ocean ridge basalt-normalized trace element distributions of the rock samples indicate enrichment in large-ion lithophile elements (LILE) and Th, and negative anomalies in Ta, Nb, Ti and P elements. The chondrite normalized diagrams of the samples show an approximately parallel and straight trend (LaN/SmN: 0.93-2.13; LaN/LuN: 0.23-0.89), suggesting a similar source for the volcanic rocks. The geochemical implications such as negative Nb anomaly, depleted HFS element abundances and enriched LIL element pattern indicate the contribution of a subducting plate. As a result, the volcanites in the near of Güneyköy (Elazığ) are members of the Yüksekova Complex and were formed in an intra-oceanic arc environment within the Southern Branch of Neotethys.
Alan : Fen Bilimleri ve Matematik; Mühendislik
Dergi Türü : Uluslararası
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