干旱区生态环境知识资源中心(Arid): Appraisal for the environment, weathering and provenance of Upper Cretaceous-Lower Tertiary shales, Western Desert, Egypt

Arid

DOI	10.46544/AMS.v26i1.15
	Appraisal for the environment, weathering and provenance of Upper Cretaceous-Lower Tertiary shales, Western Desert, Egypt
	El Shinawi, Abdelaziz; Ramadan, Fatma; Zelenakova, Martina
通讯作者	Zelenakova, M (corresponding author), Tech Univ Kosice, Fac Civil Engn, Inst Environm Engn, Kosice 04200, Slovakia.
来源期刊	ACTA MONTANISTICA SLOVACA
ISSN	1335-1788
出版年	2021
卷号	26 期号:1 页码:171-184
英文摘要	The combination of the mineralogical and geochemical composition of shales is considered a key to decipher their environment evolution, weathering, climatic conditions, and provenance. The Upper Cretaceous-Lower Tertiary succession is extensively dispersed in Egypt. The present work is devoted to studying the Dakhla shales of (Maastrichtian-Danian), Duwi (Campanian) and Quseir (pre-Campanian) formations. Chemical and mineralogical analyses were conducted by using seven representative surface sections from Dakhla Oasis. Dakhla shales are dominates by Smectite and kaolinite. The average percentages of SiO2, Al2O3, CaO, MgO, Na2O and K2O are subordinate values. In contrast, Al2O3 contents of Dakhla shale, TiO2, P2O5 and Fe2O3, contents are relatively higher than common shale composition. The CIA and CIW high values due to clay minerals and the absence of feldspars. This is also confirmed by the smectite domination and subordinate kaolinite in these formations. The ICV values for Dakhla and Duwi shales are 0.59 and 0.74 (ICV < 1). The shale is mature and deposited in a quiescent environment. Whereas the ICV for Quseir shale is 1.24, it can be incidental that it is immature. The shale is wholly detrital and a product of moderate to intensive weathering. The provenance was constituted of granitic and basaltic source rocks, and the parent provenance is basalt. Consequently, the shale is deposited under fluvio-marine environments, and the prevailed condition was of alkaline chemical affinity probably passed through different environments varying from a fluvial, eolian and shallow marine.
英文关键词	Depositional environment clay minerals weathering Dakhla shale thermal analyses
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000653449500015
WOS关键词	SEDIMENTARY-ROCKS ; DAKHLA FORMATION ; GEOCHEMISTRY ; BASIN ; AREA ; PETROGENESIS ; SUPERGROUP ; CHEMISTRY ; EVOLUTION ; SEQUENCE
WOS类目	Geosciences, Multidisciplinary ; Mining & Mineral Processing
WOS研究方向	Geology ; Mining & Mineral Processing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349262
作者单位	[El Shinawi, Abdelaziz] Zagazig Univ, Fac Sci, Dept Geol, Environm Geophys Lab ZEGL, Zagazig, Egypt; [Ramadan, Fatma] Zagazig Univ, Fac Sci, Dept Geol, Zagazig, Egypt; [Zelenakova, Martina] Tech Univ Kosice, Fac Civil Engn, Inst Environm Engn, Kosice 04200, Slovakia
推荐引用方式 GB/T 7714	El Shinawi, Abdelaziz,Ramadan, Fatma,Zelenakova, Martina. Appraisal for the environment, weathering and provenance of Upper Cretaceous-Lower Tertiary shales, Western Desert, Egypt[J],2021,26(1):171-184.
APA	El Shinawi, Abdelaziz,Ramadan, Fatma,&Zelenakova, Martina.(2021).Appraisal for the environment, weathering and provenance of Upper Cretaceous-Lower Tertiary shales, Western Desert, Egypt.ACTA MONTANISTICA SLOVACA,26(1),171-184.
MLA	El Shinawi, Abdelaziz,et al."Appraisal for the environment, weathering and provenance of Upper Cretaceous-Lower Tertiary shales, Western Desert, Egypt".ACTA MONTANISTICA SLOVACA 26.1(2021):171-184.