Palaeoenvironmental Reconstruction of the Early to Middle Miocene Sequence in West Central

Palaeoenvironmental Reconstruction of the Early to Middle Miocene Sequence in West Central Sinai,

Egypt, as Revealed from Fossil Diatoms

Abdelfattah A.ZALAT

【期刊名称】《地质学报（英文版）》 【年(卷),期】2024(092)001

【摘要】A detailed analysis of the diatoms from the sedimentary sequence exposed in Abu Qada basin,west central Sinai,was used to determine the palaeoenvironmental changes during the Lower to Middle Miocene.A total of 85 diatom species and varieties belonging to 37 genera were identified from 154 samples collected throughout the stratigraphic succession.The lithological characters of the studied samples

varied

between

sandstone,silty

interbeds,sandy

shales,shales,and terminated with anhydrite and limestones.These rock units are included in two lithostratigraphic formations (Rudies and Kareem),which are separated by a marked unconformity.The distribution and preservation of fossil diatoms in the sedimentary record are examined with the aim of outlining the temporal and spatial variation in the composition of the diatom assemblages,in order to estimate the changes in depositional environments during the Lower to Middle Miocene.The distributional pattern of the recorded diatom taxa distinguished four diatom eco-zones.The environment of each eco-zone

is deduced and a proposed paleobathymetric change and depositional history of the Miocene sediments in the studied area are given. 【总页数】13页(354-366) 【关键词】

【作者】Abdelfattah A.ZALAT

【作者单位】Department of Geology, Faculty of Science, Tanta University, Tanta 31527, Egypt 【正文语种】英文 【中图分类】 【文献来源】

https://www.zhangqiaokeyan.com/academic-journal-cn_acta-geologica-sinica-english-edition_thesis/0201253300107.html 【相关文献】

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