干旱区生态环境知识资源中心(Arid): Geochemistry and mineralogy of Qaroun Lake and relevant drain sediments, El-Fayoum, Egypt

Arid

DOI	10.1016/j.jafrearsci.2021.104388
	Geochemistry and mineralogy of Qaroun Lake and relevant drain sediments, El-Fayoum, Egypt
	El-Sayed, Salah Abdelwahab; Hassan, Hanan B.; El-Sabagh, Moustafa E., I
通讯作者	El-Sayed, SA (corresponding author), Egyptian Nucl & Radiol Regulatory Author ENRRA, Nasr City, Cairo Governora, Egypt.
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2022
卷号	185
英文摘要	Qaroun Lake (El-Fayoum, Egypt) is a saline endorheic basin within the northern arid zone of El-Fayoum, Egypt. Mineralogical and geochemical investigations were conducted on 32 samples from the Holocene sediments of the lake and relevant drains to get information on the sediment type and maturity, source rocks, weathering, environments of deposition, and tectonic settings. The lithology of sediment samples consists of pelites and sandstones with low compositional maturity degree characterizing first cycle deposits. The sediments are mainly composed of quartz and calcite, with minor phases including feldspar, dolomite, saponite, kaolinite, hematite, goethite, gypsum, and halite minerals. The lake's sediments are enriched in Cr, Mo, Hf, Pr, and Nd and depleted in Ni, Zn, As, Rb, Y, Sn, Sb, Ba, and La, while the drain's ones are enriched in V, Sr, Zr, Cr, Mo, Hf, Pr and Nd and depleted in Co, Zn, As, Rb, Y, Sn, Sb, Ba, Pb, and La, compared to the earth's crust shale. These sediments are mainly sourced from intermediate and felsic igneous rocks, as well as, calcareous and sandstone materials incorporated in the nearby geologic formations and soils. The high SiO2 and the low Fe2O3 and MgO concentrations reflects the acidic nature of rocks in the source area. The SiO2 and (Al2O3+K2O+Na2O) binary plot indicates the prevailing semiarid to arid climatic conditions during the sedimentation. High values of CIA and PIA and low values of ICV as well as the relationship between K2O/Na2O and K2O+Na2O contents reveal relatively moderate to a high degree of chemical weathering in the source area. The elemental ratios and geochemical discrimination diagrams show that the sedimentary environments are fluviatile-deltaic environments that experienced oxic to dysoxic conditions. The geochemical characteristics of the lake sediment samples point to a transitional tectonic setting from oceanic island arc to active continental and passive continental margins, while those of the drains samples indicate an active continental tectonic setting. The obtained data can be meaningful for the development of Qaroun lake environment.
英文关键词	Qaroun Lake Drains Holocene sediments Mineralogy Geochemical composition Environment of deposition
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000712256900002
WOS关键词	METAL POLLUTION ; QIANGTANG BASIN ; PROVENANCE ; QARUN ; ROCKS ; EVOLUTION ; SHALES ; DEPRESSION ; CHEMISTRY ; ELEMENTS
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374463
作者单位	[El-Sayed, Salah Abdelwahab; Hassan, Hanan B.] Egyptian Nucl & Radiol Regulatory Author ENRRA, Nasr City, Cairo Governora, Egypt; [El-Sabagh, Moustafa E., I] Egyptian Mineral Resources Author EMRA, Cairo, Egypt
推荐引用方式 GB/T 7714	El-Sayed, Salah Abdelwahab,Hassan, Hanan B.,El-Sabagh, Moustafa E., I. Geochemistry and mineralogy of Qaroun Lake and relevant drain sediments, El-Fayoum, Egypt[J],2022,185.
APA	El-Sayed, Salah Abdelwahab,Hassan, Hanan B.,&El-Sabagh, Moustafa E., I.(2022).Geochemistry and mineralogy of Qaroun Lake and relevant drain sediments, El-Fayoum, Egypt.JOURNAL OF AFRICAN EARTH SCIENCES,185.
MLA	El-Sayed, Salah Abdelwahab,et al."Geochemistry and mineralogy of Qaroun Lake and relevant drain sediments, El-Fayoum, Egypt".JOURNAL OF AFRICAN EARTH SCIENCES 185(2022).