干旱区生态环境知识资源中心(Arid): Remote sensing-based geological mapping and petrogenesis of Wadi Khuda Precambrian rocks, South Eastern Desert of Egypt with emphasis on leucogranite

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DOI	10.1016/j.ejrs.2019.07.004
	Remote sensing-based geological mapping and petrogenesis of Wadi Khuda Precambrian rocks, South Eastern Desert of Egypt with emphasis on leucogranite
	Asran, Asran M.; Hassan, S. M.
通讯作者	Hassan, SM (corresponding author), Natl Author Remote Sensing & Space Sci, Cairo, Egypt.
来源期刊	EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES
ISSN	1110-9823
EISSN	2090-2476
出版年	2021
卷号	24 期号:1 页码:15-27
英文摘要	The exposed Precambrian rocks along Wadi Khuda area, South Eastern Desert of Egypt, comprise gneisses, amphibolites and migmatites associations (infrastructural rocks) which are intruded by diorite, tonalite, syenogranite and leucogranite (LG). LG forms homogeneous boss like bodies, devoid to xenoliths, except along the outer margins. Chemically and mineralogically they are dissimilar to the surrounding gneisses. In the current study, band ratio and Decorrelation Stretch image processing algorithms were proposed and applied on Landsat-8, Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and Sentinel-2 remote sensing data to discriminate the widely exposed lithological units in the mapped area. Geochemically, I-type classification and volcanic arc environment were revealed. LG is peraluminous (ASI average of 1.09) with normative corundum up to 1.38 for LG. The LG displays limited major and trace element variations (SiO2 = 74.5-76.2%, AI(2)O(3) = 13.4-14.4%), MgO = 0.03-0.19%, Na2O = 3.6- 4.6%), and Rb = 55-85 ppm) probably due to textural and mineralogical homogeneity. The contents of REE in the leucogranite are low (Sigma REE = 21-37), but the REE patterns are [(La/Yb)n = 2.45-9.03], [(La/Sm)(n) = 1.09-2.6], with negative Eu anomaly, (Eu/Eu* = 0.19-0.78). The negative Eu anomaly and the low Sr content (16-92 ppm) may be attributed to the plagioclase feldspars fractionation. The leucogranites represent residual melt of syenogranite which forms Um Itly pluton at the southern flank of Wadi Khuda entrance. (c) 2019 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B. V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/).
英文关键词	Leucogranites Khuda I-type Remote sensing Eastern Desert Egypt
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:000617776400002
WOS类目	Environmental Sciences ; Remote Sensing
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350059
作者单位	[Asran, Asran M.] Sohag Univ, Fac Sci, Geol Dept, Sohag 82524, Egypt; [Hassan, S. M.] Natl Author Remote Sensing & Space Sci, Cairo, Egypt
推荐引用方式 GB/T 7714	Asran, Asran M.,Hassan, S. M.. Remote sensing-based geological mapping and petrogenesis of Wadi Khuda Precambrian rocks, South Eastern Desert of Egypt with emphasis on leucogranite[J],2021,24(1):15-27.
APA	Asran, Asran M.,&Hassan, S. M..(2021).Remote sensing-based geological mapping and petrogenesis of Wadi Khuda Precambrian rocks, South Eastern Desert of Egypt with emphasis on leucogranite.EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES,24(1),15-27.
MLA	Asran, Asran M.,et al."Remote sensing-based geological mapping and petrogenesis of Wadi Khuda Precambrian rocks, South Eastern Desert of Egypt with emphasis on leucogranite".EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES 24.1(2021):15-27.