Micropaleontological findings and absolute ages mark the termination of the Last Glacial Maximum in the Eastern Mediterranean Region: New electron spin resonance data from Gediz Delta (Western Turkey)

IF 1.3 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Turkish Journal of Earth Sciences Pub Date : 2023-01-01 DOI:10.55730/1300-0985.1859

Ekin Gökçe Benli, Hülya Aslin, I. Işintek, Birol Engin, B. Geçkin

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引用次数: 1

Abstract

: Sediments and fossil content of Gediz Delta (Eastern Aegean Sea- İzmir) were examined from the samples collected from three drilling cores from the west (seaward) to east (landward) of the delta. Each drilling core contains Quarternary marine deposits with a marine fauna of foraminifers, bivalves, gastropods, echinoids, and ostracods at the bottom and Quaternary continental delta deposits at the top. According to our Electron Spin Resonance (ESR) age model marine sediments of the Aegean Sea started to cover the western Gediz Delta area before 19.9 ka (thousand years). Following the Last Glacial Maximum (LGM), after the transgression due to deglaciation occurred 15.3 ka ago, the coastline progressed 15–20 km eastward and covered the entire delta area. At the end of the LGM, as a result of the overflow of Manisa Gediz Lake depending on the deglaciation in Western Anatolia, and its flow from the Emiralem Strait to the İzmir Bay, the continental deposits reaching the West Gediz Delta region are younger than 11.4 ka.

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微观天文学发现和绝对年龄标志着东地中海地区最后一次冰川盛期的结束：来自格迪兹三角洲（土耳其西部）的新电子自旋共振数据

：从三角洲西部（向海）至东部（向陆）的三个钻孔岩芯中采集的样本中，对格迪兹三角洲（东爱琴海-伊兹密尔）的沉积物和化石含量进行了检查。每个钻探岩芯都包含第四纪海洋沉积物，底部有有孔虫、双壳类、腹足类、棘皮动物和介形虫的海洋动物群，顶部有第四纪大陆三角洲沉积物。根据我们的电子自旋共振（ESR）年龄模型，爱琴海的海洋沉积物在19.9ka（千年）之前就开始覆盖格迪斯三角洲西部地区。在最后一次冰川盛期（LGM）之后，15.3 ka前由于冰川消融而发生海侵，海岸线向东延伸15-20公里，覆盖了整个三角洲地区。在LGM末期，由于Manisa Gediz湖的溢流取决于安纳托利亚西部的冰川消融，以及其从Emiralem海峡流向伊兹密尔湾，到达西Gediz三角洲地区的大陆沉积物年龄小于11.4 ka。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Turkish Journal of Earth Sciences 地学-地球科学综合

CiteScore

2.40

自引率

10.00%

发文量

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.