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篇目详细内容

【篇名】 Major transgression during Late Cretaceous constrained by basin sediments in northern Africa: implication for global rise in sea level
【刊名】 Frontiers of Earth Science
【刊名缩写】 Front. Earth Sci.
【ISSN】 2095-0195
【EISSN】 2095-0209
【DOI】 10.1007/s11707-017-0661-0
【出版社】
【出版年】 2017
【卷期】 11 卷4期
【页码】 740-750 页,共 11 页
【作者】 Kaixuan AN; Hanlin CHEN; Xiubin LIN; Fang WANG; Shufeng YANG; Zhixin WEN; Zhaoming WANG; Guangya ZHANG; Xiaoguang TONG;
【关键词】 global sea-level changes|Late Cretaceous|transgression|sedimentary facies|northern Africa

【摘要】

The global rise in sea level during the Late Cretaceous has been an issue under discussion by the international geological community. Despite the significance, its impact on the deposition of continental basins is not well known. This paper presents the systematic review on stratigraphy and sedimentary facies compiled from 22 continental basins in northern Africa. The results indicate that the region was dominated by sediments of continental facies during Early Cretaceous, which were replaced by deposits of marine facies in Late Cretaceous. The spatio-temporal distribution of sedimentary facies suggests marine facies deposition reached as far south as Taoudeni-Iullemmeden-Chad-Al Kufra-Upper Egypt basins during Turonian to Campanian. These results indicate that northern Africa underwent significant transgression during Late Cretaceous reaching its peak during Turonian to Coniacian. This significant transgression has been attributed to the global high sea-level during this time. Previous studies show that global rise in sea level in Late Cretaceous may have been driven by an increase in the volume of ocean water (attributed to high CO2 concentration and subsequently warm climate) and a decrease in the volume of the ocean basin (attributed to rapid production of oceanic crust and seamounts). Tectonic mechanism of rapid production of oceanic crust and seamounts could play a fundamental role in driving the global rise in sea level and subsequent transgression in northern Africa during Late Cretaceous.

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