Sequence stratigraphy of the upper Oligocene–middle Miocene succession in west–central Sinai, Egypt,Geological Journal

当前位置： X-MOL 学术 › Geolog. J. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Sequence stratigraphy of the upper Oligocene–middle Miocene succession in west–central Sinai, Egypt
Geological Journal ( IF 1.4 ) Pub Date : 2022-09-22 , DOI: 10.1002/gj.4590
Haitham M. Ayyad ₁ , Abdel Galil A. Hewaidy ₁ , Sherif Farouk ₂ , Ahmed Samir ₁ , Youssef S. Bazeen ₁

Affiliation

The calcareous nannofossil and foraminiferal analyses have been integrated to build a detailed chronostratigraphic scheme for the upper Oligocene–middle Miocene succession in the Nukhul–Sudr area, west–central Sinai, Egypt. The palaeoenvironmental conditions of the studied succession were assessed using the palaeoecologic preferences of calcareous nannofossil species, benthic foraminifera, and planktonic/benthic (P/B) ratios. Six complete and two incomplete depositional sequences bounded by seven sequence boundaries have been distinguished in the studied sections based on the integration between chronostratigraphic and palaeoenvironmental interpretations as well as the nature of stratigraphic surfaces. Levels suggesting subaerial exposures (such as alluvial fans and polymictic conglomerates) and biostratigraphic breaks were employed to delineate sequence boundaries. The inferred relative sea-level curve points to palaeodepth change ranging from lagoonal to outer shelf settings during the deposition. The established upper Oligocene–middle Miocene sequence stratigraphic framework demonstrates a more-or-less compatible correlation toward the corresponding ones from the neighbouring localities around the eastern rim of the Gulf of Suez. However, the inferred relative sea-level curve shows significant deviations when compared with the eustasy. These deviations are expressed mainly by several prolonged time gaps and discrepancies in the timing and magnitude of the transgression and regression events. Therefore, the Gulf of Suez rift Basin development and the coincident regional tectonic events are the main controlling factors for the sedimentation regime in west–central Sinai.

中文翻译：

埃及西奈半岛上渐新世-中新世层序的层序地层学

钙质超微化石和有孔虫分析已被整合起来，为埃及西奈半岛中西部 Nukhul-Sudr 地区的上渐新世-中新世演替建立了详细的年代地层学方案。使用钙质超微化石物种、底栖有孔虫和浮游/底栖 (P/B) 比率的古生态偏好评估了所研究演替的古环境条件。根据年代地层学和古环境解释之间的整合以及地层表面的性质，在研究的剖面中，已经区分了由七个层序边界界定的六个完整和两个不完整的沉积层序。表明地面暴露（如冲积扇和混合砾岩）和生物地层断裂的水平被用来描绘层序边界。推断的相对海平面曲线表明在沉积过程中从泻湖到外陆架设置的古深度变化。已建立的上渐新世-中中新世层序地层框架显示出与苏伊士湾东缘周围邻近地区的相应地层或多或少兼容的相关性。然而，推断的相对海平面曲线与海平面相比显示出明显的偏差。这些偏差主要表现为几个延长的时间间隔以及海侵和海退事件的时间和幅度的差异。所以，

更新日期：2022-09-22

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11