Geochronology, geochemistry and tectono-magmatic evolution of the upper Carboniferous–lower Permian Kula pluton in the Istranca (Strandja) Massif, NW Turkey

IF 1 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Geologica Carpathica Pub Date : 2021-11-09 DOI:10.31577/geolcarp.72.5.2

Serdar Akgündüz, N. Aysal, I. Peytcheva, Sabah Yilmaz Şahin, Yildirim Güngör

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引用次数: 1

Abstract

Upper Carboniferous–lower Permian plutonic rocks (i.e. the Kula pluton) are exposed in Istranca (Strandja) Zone, NW Pontides on both sides of Turkish and Bulgarian border. The Kula pluton is composed of monzogranite, granodiorite, and quartzmonzodiorite facies with a medium to coarse-grained, mylonitic–blasto mylonitic texture. It was affected by low-grade greenschist facies metamorphism, and displays distinct foliation as a result of intense tectonism. This pluton was classified as metaluminous and peraluminous (ASI values 0.95–1.13), I-type, calc-alkaline to high-K calc-alkaline in character. Zircon U–Pb crystallization ages of the pluton are between 298.0.6 ± 0.68 Ma (early Permian – Asselian) and 311.91 ± 1.34 Ma (late Carboniferous – Moscovian). Based on new geochemical and geochronological data, the Kula pluton was generated from a subduction-related magmatic arc-setting during the late Carboniferious to early Permian. This period corresponds to the closure of the Paleo-Tethys Ocean following northward subduction of the Paleo-Tethyan oceanic lithosphere and development of a magmatic arc along the Eurasian continental margin.

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土耳其伊特兰卡(Strandja)地块上石炭统-下二叠统库拉岩体年代学、地球化学及构造岩浆演化

在土耳其和保加利亚边境两侧的西北庞德兹地区伊斯特兰卡(斯特兰加)带，出露上石炭统-下二叠统深成岩(即库拉深成岩)。库拉岩体由二长花岗岩、花岗闪长岩和石英二黄长岩相组成，具有中至粗粒、糜棱岩-胚岩-糜棱岩的结构。受低品位绿片岩相变质作用的影响，构造作用强烈，具有明显的片理作用。该岩体具有过铝质(ASI值0.95 ~ 1.13)、i型、钙碱性至高钾钙碱性特征。岩体锆石U-Pb结晶年龄为298.0.6±0.68 Ma(早二叠世-亚塞利亚)~ 311.91±1.34 Ma(晚石炭世-莫斯科)。根据新的地球化学和年代学资料，库拉岩体形成于晚石炭世至早二叠世的俯冲岩浆弧背景。这一时期与古特提斯洋岩石圈向北俯冲和沿欧亚大陆边缘岩浆弧发育后古特提斯洋闭合相对应。

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来源期刊

Geologica Carpathica 地学-地球科学综合

CiteScore

2.40

自引率

23.10%

发文量

审稿时长

>12 weeks

期刊介绍： GEOLOGICA CARPATHICA covers a wide spectrum of geological disciplines including geodynamics, tectonics and structural geology, volcanology, stratigraphy, geochronology and isotopic geology, karstology, geochemistry, mineralogy, petrology, lithology and sedimentology, paleogeography, paleoecology, paleobiology and paleontology, paleomagnetism, magnetostratigraphy and other branches of applied geophysics, economic and environmental geology, experimental and theoretical geoscientific studies. Geologica Carpathica , with its 60 year old tradition, presents high-quality research papers devoted to all aspects not only of the Alpine-Carpathian-Balkanian geoscience but also with adjacent regions originated from the Mediterranean Tethys and its continental foreland. Geologica Carpathica is an Official Journal of the Carpathian-Balkan Geological Association.

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