干旱区生态环境知识资源中心(Arid): Magnetic interpretation of north Gebel El Shallul area, central Eastern Desert, Egypt

Arid

DOI	10.1016/j.ejrs.2010.07.007
	Magnetic interpretation of north Gebel El Shallul area, central Eastern Desert, Egypt
	Khameis, Ahmed A.; Nigm, Ahmed A.
通讯作者	Khameis, AA
来源期刊	EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES
ISSN	1110-9823
EISSN	2090-2476
出版年	2010
卷号	13 期号:1 页码:53-62
英文摘要	The present work utilizes the aeromagnetic data supported by geology and remote sensing satellite data, to delineate surface and subsurface structural elements in north Gebel El Shallul area. Geologically, the area is covered by Precambrian basement rocks to the East (metasediments, metavolcanics, Hammamat sediments and younger granites) and Phanerozoic sediments to the West (Nubian Sandstones and Qouseir clastics). The Landsat image of the area gave additional detailed litholgic information which is very useful in identifying and discriminating the different lithologic rocks exposed in the area. Analysis of the structural lineaments of the Landsat image and the compiled geological map show that most of the well-developed structural lineaments have NW, NNW and ENE trends. The aeromagnetic data were analyzed and processed by several advanced techniques; reduction to the pole, regional-residual separation, second vertical derivative (SVD), analytical signal, Euler deconvolution and shadowgrams. The application of local power spectrum on the reduced to North Pole (RTP) aeromagnetic data indicated that the average depths to the near-surface and deepseated causative magnetic bodies were found to attain 0.5 and 1.8 km, respectively. Therefore, the filtering of the aeromagnetic data at the two assigned interfaces was conducted to assist the discrimination of the residual (near-surface) and regional (deep-seated) magnetic anomalies. The prepared aeromagnetic maps have been interpreted qualitatively and quantitatively to deduce the structural elements which were used to construct a basement tectonic map for the area. The used analysis techniques helped to reveal many structural elements such as faults of different orders, uplifted blocks (antiforms or horsts) and subsided blocks (basins or synforms). It has been found that the NNW pronounced linear magnetic anomalies, normally and reversely magnetized, are associated with deep-seated diabasic dykes. The interpretation of the basement tectonic map of the area indicated the presence of a set of unexposed subsurface basic dykes running generally in NNW-SSE direction controlling the courses of major wadis in the study area. This set of NNW-SSE basic dykes are dissected by a NE-SW fault system. These two sets of fault systems were found to be matched well with that obtained from the Landsat image and geological map. It was found that the pronounced NNW direction is a predominant structural trend controlling the structural framework of the area. (C) 2010 National Authority for Remote Sensing and Space Sciences. Production and hosting by Elsevier B.V. All rights reserved.
英文关键词	Gebel EL Shallul Aeromagnetic Structural interpretation Basic dykes
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:000216576400007
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/2XILL650/329469
作者单位	[Khameis, Ahmed A.; Nigm, Ahmed A.] Nucl Mat Author, Cairo, Egypt
推荐引用方式 GB/T 7714	Khameis, Ahmed A.,Nigm, Ahmed A.. Magnetic interpretation of north Gebel El Shallul area, central Eastern Desert, Egypt[J],2010,13(1):53-62.
APA	Khameis, Ahmed A.,&Nigm, Ahmed A..(2010).Magnetic interpretation of north Gebel El Shallul area, central Eastern Desert, Egypt.EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES,13(1),53-62.
MLA	Khameis, Ahmed A.,et al."Magnetic interpretation of north Gebel El Shallul area, central Eastern Desert, Egypt".EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES 13.1(2010):53-62.