The provenance of coarse-grained turbidite sandstones in the Kırkgeçit Formation(western part of the Elazığ Basin-east Turkey)

IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Turkish Journal of Earth Sciences Pub Date : 2022-01-01 DOI:10.55730/1300-0985.1760
O. Alkaç, Ercan Aksoy
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Abstract

and geotectonic Abstract: Modal analysis of sandstones for conglomerate rich marine basins is useful for investigating the provenance types surrounded by plate tectonics. Different kinds of siliciclastic rocks are important indicators for defining the paleogeography and geotectonic conditions of the sedimentary basin by provenance analysis. This paper, which focuses on the petrography and provenance of conglomerate rich turbidite systems, is one of the rarest studies on the sedimentary characteristics in the scientific literature. In this context, the study was carried out in the western part of the Elazığ Basin. The Middle Eocene–Oligocene basin infill called the Kırkgeçit Formation is characterised by the conglomerate rich submarine channel deposits and coarse-grained turbidite sandstones. Petrographically, the coarse-grained sandstones of the Kırkgeçit Formation are composed of litharenite and rarely feldspathic litharenite, lithic arkose and rock fragments. Mostly the components are derived from volcanic and plutonic rocks of the Elazığ Magmatites. Fossils and fossil fragments are transported from the shallow part of the western Elazığ Basin. The components transported from metamorphic rock fragments, which are rarely observed in the sandstone samples, are composed of recrystallized limestones and derived from Keban Metamorphites in the northern part of the basin. The provenance studies and petrographic analyses indicated that the conglomerate rich channels and coarse-grained sediments of turbidite sandstones in the Kırkgeçit Formation were plotted mostly to the recycled orogenic and undissected arc type source rocks. Therefore, this type of source rocks has been reflected as a back-arc basin deposit during Middle-Upper Eocene. The geotectonic evolution of the western Elazığ Basin has also supported
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Elazığ盆地西部-土耳其东部Kırkgeçit组粗粒浊积砂岩物源研究
和大地构造摘要:富含砾岩的海相盆地砂岩的模态分析有助于研究板块构造包围的物源类型。不同类型的硅碎屑岩是通过物源分析确定沉积盆地古地理和大地构造条件的重要指标。本文主要研究富含砾岩的浊积岩系统的岩石学和物源,是科学文献中最罕见的沉积特征研究之一。在这种情况下,这项研究是在Elazığ盆地的西部进行的。始新世中期-渐新世盆地填充物称为Kırkgeçit组,其特征是富含砾岩的海底河道沉积物和粗粒浊积砂岩。从岩石学角度来看,Kırkgeçit组的粗粒砂岩由岩屑砂岩和少量长石岩屑砂岩、岩屑长石砂岩和岩石碎片组成。大部分成分来源于Elazığ岩浆岩的火山岩和深成岩。化石和化石碎片来自Elazığ盆地西部的浅部。从变质岩碎片中输送的成分,在砂岩样品中很少观察到,由再结晶石灰岩组成,来源于盆地北部的科班变质岩。物源研究和岩相分析表明,Kırkgeçit组浊积砂岩富含砾岩的通道和粗粒沉积物主要与再生造山和未扇形弧型烃源岩有关。因此,这类烃源岩在中-上始新世被反映为弧后盆地沉积。Elazığ盆地西部的大地构造演化也支持
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来源期刊
Turkish Journal of Earth Sciences
Turkish Journal of Earth Sciences 地学-地球科学综合
CiteScore
2.40
自引率
10.00%
发文量
6
审稿时长
6 months
期刊介绍: The Turkish Journal of Earth Sciences is published electronically 6 times a year by the Scientific and Technological Research Council of Turkey (TÜBİTAK). It is an international English-language journal for the publication of significant original recent research in a wide spectrum of topics in the earth sciences, such as geology, structural geology, tectonics, sedimentology, geochemistry, geochronology, paleontology, igneous and metamorphic petrology, mineralogy, biostratigraphy, geophysics, geomorphology, paleoecology and oceanography, and mineral deposits. Contribution is open to researchers of all nationalities.
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