干旱区生态环境知识资源中心(Arid): Application of remote sensing in exploration for uranium mineralization in Gabal El Sela area, South Eastern Desert, Egypt

Arid

DOI	10.1016/j.ejrs.2013.11.001
	Application of remote sensing in exploration for uranium mineralization in Gabal El Sela area, South Eastern Desert, Egypt
	Ramadan, Talaat M.; Ibrahim, Tarek M.; Said, Abu Deif; Baiumi, Moustafa
通讯作者	Ramadan, TM
来源期刊	EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES
ISSN	1110-9823
EISSN	2090-2476
出版年	2013
卷号	16 期号:2 页码:199-210
英文摘要	This research aims at integrating remote sensing data and field studies to prospect for radioactive materials at Gabal El Sela area, South Eastern Desert of Egypt. This area is a part of the Arabo-Nubian shield, which is constituted by Late Precambrian basement rocks and developed during the Pan African tectono-thermal event. Geological interpretation of Landsat ETM+ image and field studies revealed that the study area is mainly covered by ophiolitic ultramafic rocks, intermediate metavolocanics, granodiorites, biotite granites and garnetiferous muscovite granites. These rocks are injected by pegmatitic and quartz veins and cut by acidic and basic dykes. The processed Landsat ETM+ data enable also to identify uraniferous alteration zones hosted in the granitic rocks (using band ratio 5/7, 4/5, 3/1 in RGB, density slicing and supervised classification techniques). The measured reflectance values (DNs) of six spectral bands of Landsat ETM+ for all exposed rock types in the study area show that the alteration zones have the highest reflectance values. The study recorded the presence of uranium mineralizations in alteration zones associating with the granitic rocks occurring along ENE-WSW trending shear zones. Three uranium-bearing alteration zones hosted in granitic rocks were detected. These zones are characterized by ferrugination, silicification, grizenization and kaolinitization. The most promising alteration zones (Site 1) occurs at the northeastern part of Gabal El Sela and is characterized by very high radioactive anomalies (up to 5000 ppm eU). Microprobe analyses of samples collected from these alteration zones reveal the presence of uraninite crystals. It seems that the high fractures density of the granitic rocks acted as good channels for the ascending hydrothermal fluids and the percolating meteoric water, that leached the uranium minerals disseminated all over the rocks and redeposited them along the fractures of the shear zones. This study demonstrates the utility of orbital remote sensing data for finding unknown mineralized zones in the Eastern Desert of Egypt and similar arid regions. (C) 2013 Production and hosting by Elsevier B. V. on behalf of National Authority for Remote Sensing and Space Sciences.
英文关键词	Biotite granites Landsat ETM+ Uranium mineralizations Alteration zones Quartz veins Eastern desert
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000216584100007
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/2XILL650/330379
作者单位	[Ramadan, Talaat M.] Natl Author Remote Sensing & Space Sci NARSS, Cairo, Egypt; [Ibrahim, Tarek M.; Baiumi, Moustafa] Nucl Mat Author, Cairo, Egypt; [Said, Abu Deif] Zagazig Univ, Fac Sci, Zagazig, Egypt
推荐引用方式 GB/T 7714	Ramadan, Talaat M.,Ibrahim, Tarek M.,Said, Abu Deif,et al. Application of remote sensing in exploration for uranium mineralization in Gabal El Sela area, South Eastern Desert, Egypt[J],2013,16(2):199-210.
APA	Ramadan, Talaat M.,Ibrahim, Tarek M.,Said, Abu Deif,&Baiumi, Moustafa.(2013).Application of remote sensing in exploration for uranium mineralization in Gabal El Sela area, South Eastern Desert, Egypt.EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES,16(2),199-210.
MLA	Ramadan, Talaat M.,et al."Application of remote sensing in exploration for uranium mineralization in Gabal El Sela area, South Eastern Desert, Egypt".EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES 16.2(2013):199-210.