干旱区生态环境知识资源中心(Arid): Geochemistry and mineralogy of modern floodplain Nile sediments of Sohag area, Egypt: an environmental perspective

Arid

DOI	10.1007/s12665-024-11638-7
	Geochemistry and mineralogy of modern floodplain Nile sediments of Sohag area, Egypt: an environmental perspective
	Ali, Mohammed H.; El Aal, Ahmed Abd; Radwan, Ahmed E.; Saber, El Sayed A.
通讯作者	Radwan, AE
来源期刊	ENVIRONMENTAL EARTH SCIENCES
ISSN	1866-6280
EISSN	1866-6299
出版年	2024
卷号	83 期号:11
英文摘要	Understanding the characteristics of modern floodplain sediment (MFS) is important for geomorphological, paleoclimatic, sedimentation, and environmental investigations. We collected samples from present floodplain Nile sediments in Egypt's Sohag area and used mineralogical and geochemical (i.e., major and trace elements) proxies to investigate the characteristics and establish their provenances, climatic conditions during deposition, and weathering influence. The study revealed that the Nile floodplain sediments are composed mainly of silt (26-77%), clay fraction (7-44%), and sand content (3-63%), and their texture is classified as clayey silt. These sediments are classified geochemically as greywacke to shale. The mineralogical studies revealed two main assemblages of heavy minerals: the first assemblage represented by magnetite, goethite, zircon, epidote, and garnet and reflects the basement complex in the Eastern Desert and its surrounding rocks; and the second assemblage of goethite, pyroxene, hornblend, and mica of fooldplain deposits derived from the Ethiopian highlands. The geochemical studies indicate that the Nile sediments are immature and formed due to the moderate degree and nonsteady chemical weathering of the parent rocks. The geochemical studies show different mixed sources of sediments, where fine sediments are mostly mafic igneous with a partial contribution from siliscic sedimentary rocks, while the coarser ones are derived mainly from siliscic sedimentary and acidic igneous rocks. The sediments of the presented modern fooldplain reflected two different tectonic setting source areas (collision and continental rift tectonic setting for high silica and low silica samples, respectively) that were shared in supplying the sediments to the present basin. The study revealed that the investigated area may become desertified as a result of climate change and human activities such as salinity, fertiliser use, sand encroachment, and pollution.
英文关键词	Modern floodplain Nile sediments Environmental Desertification Climate change
类型	Article
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001228667100004
WOS关键词	PENNSYLVANIAN-PERMIAN AGE ; RARE-EARTH-ELEMENTS ; SLOVAKIA IMPLICATIONS ; IRAN IMPLICATIONS ; GREENSTONE-BELT ; SOUTHERN INDIA ; PROVENANCE ; ROCKS ; EVOLUTION ; SHALES
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403558
推荐引用方式 GB/T 7714	Ali, Mohammed H.,El Aal, Ahmed Abd,Radwan, Ahmed E.,et al. Geochemistry and mineralogy of modern floodplain Nile sediments of Sohag area, Egypt: an environmental perspective[J],2024,83(11).
APA	Ali, Mohammed H.,El Aal, Ahmed Abd,Radwan, Ahmed E.,&Saber, El Sayed A..(2024).Geochemistry and mineralogy of modern floodplain Nile sediments of Sohag area, Egypt: an environmental perspective.ENVIRONMENTAL EARTH SCIENCES,83(11).
MLA	Ali, Mohammed H.,et al."Geochemistry and mineralogy of modern floodplain Nile sediments of Sohag area, Egypt: an environmental perspective".ENVIRONMENTAL EARTH SCIENCES 83.11(2024).