干旱区生态环境知识资源中心(Arid): Geology and mapping of laterites, South Eastern Desert, Egypt: Based on field and ASTER data approach

Arid

DOI	10.1002/gj.3640
	Geology and mapping of laterites, South Eastern Desert, Egypt: Based on field and ASTER data approach
	El Desoky, Hatem M.; Shahin, Taher M.
通讯作者	Shahin, Taher M.
来源期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
EISSN	1099-1034
出版年	2020
卷号	55 期号:6 页码:4252-4264
英文摘要	The area between wadi Dungash-wadi Shait in the South Eastern Desert of Egypt comprises ophiolitic nappes structurally overthrust on island arc-related metasedimentary-metavolcanic rocks, which are traversed by several granitoids, gabbroic and basaltic rocks. This paper focuses on uncovering laterite zones utilizing field geological, mineralogical and geochemical attributes of the investigation region. Laterites are distributed at the border between Neoproterozoic and Phanerozoic rocks. The laterite deposits are developed after the emplacement of Natash flows as a result of lateritization process in tropical regions, during the Late Cretaceous. The laterite sections comprise a sequence from the top to the base, oxide laterite, plasmic laterite, saprolith and bedrock. The laterite sections consist of hematite and goethite together with small quantity of gibbsite. Geochemically, the laterite profiles are marked by an increase in Fe content and decrease in Si from the top to the bottom. Fe2O3 is the most abundant with 30.09-54.67 wt.%, Al2O3 vary from 18.01 to 32.78 wt.%, and SiO2 vary from 15.05 to 19.43 wt.%. Advanced Spaceborne Thermal Emission and Reflection Radiometer images are utilised to characterize a primer laterite zone. The band ratio 4/5 is found to be efficient in defining the laterite soil in the studied area.
英文关键词	Arabian-Nubian Shield ASTER Egypt laterite regolith wadi Dungash-wadi Shait
类型	Article
语种	英语
国家	Egypt
收录类别	SCI-E
WOS记录号	WOS:000494680600001
WOS关键词	ARABIAN-NUBIAN SHIELD ; AFRICAN OROGEN ; GOLD MINERALIZATION ; SHEAR ZONE ; EVOLUTION ; COLLISION ; BASIN ; COMPLEX ; PB
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2019-11-06
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310770
作者单位	Al Azhar Univ, Fac Sci, Geol Dept, POB 11884, Cairo, Egypt
推荐引用方式 GB/T 7714	El Desoky, Hatem M.,Shahin, Taher M.. Geology and mapping of laterites, South Eastern Desert, Egypt: Based on field and ASTER data approach[J],2020,55(6):4252-4264.
APA	El Desoky, Hatem M.,&Shahin, Taher M..(2020).Geology and mapping of laterites, South Eastern Desert, Egypt: Based on field and ASTER data approach.GEOLOGICAL JOURNAL,55(6),4252-4264.
MLA	El Desoky, Hatem M.,et al."Geology and mapping of laterites, South Eastern Desert, Egypt: Based on field and ASTER data approach".GEOLOGICAL JOURNAL 55.6(2020):4252-4264.