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首页> 外文期刊>Stratigraphy >The Dababiya Core: A window into Paleocene to Early Eocene depositional history in Egypt based on coccolith stratigraphy
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The Dababiya Core: A window into Paleocene to Early Eocene depositional history in Egypt based on coccolith stratigraphy

机译：达巴比亚岩心：基于古生界地层的埃及古新世至早期始新世沉积史的窗口

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The composite Paleocene-lower Eocene Dababiya section recovered in the Dababiya Quarry core and accessible in outcrop in the Dababiya Quarry exhibits an unexpected contrast in thickness between the Lower Eocene succession (-Esna Shales) and the Paleocene one (-Dakhla Shales and Tarawan Chalk). We investigate the significance of this contrast by reviewing calcareous nannofossil stratigraphic studies performed on sections throughout Egypt. We show that a regional pattern occurs, and distinguish six areas-Nile Valley, Eastern Desert and western Sinai, Central and eastern Sinai, northern Egypt and Western Desert. Based on patterns related to thicknesses of selected lithobiostratigraphic intervals and distribution of main stratigraphic gaps, we propose that the differences in the stratigraphic architecture between these regions result from differential latest Paleocene and Early Eocene subsidence following intense Middle to Late Paleocene tectonic activity in the Syrian Arc folds as a result of the closure of the Neo-Tethys.
机译：在达巴比亚采石场岩心中恢复的古新世-下始新世达巴比亚复合断层，在达比比亚采石场的露头可及，这表明下始新世演替（-Esna页岩）与古新世（-Dakhla页岩和Tarawan粉笔）之间的厚度存在出乎意料的对比。我们通过回顾在埃及各地进行的钙质纳米化石地层学研究，来研究这种对比的重要性。我们显示出发生了区域格局，并区分了六个地区-尼罗河谷，东部沙漠和西奈，西奈中部和东部，埃及北部和西部沙漠。基于与所选岩石生物地层间距的厚度和主要地层间隙的分布有关的模式，我们认为这些区域之间的地层构造差异是由叙利亚弧中强至古新世晚期构造活动之后最新的古新世和早始新世的沉降引起的。折叠由于新特提斯人的关闭。

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