Geology and spectral characterization of the basement rocks at Gabal Gerf area, southeastern Egypt

Mohamed Fouad Sadek

doi:10.1117/12.626806

31 October 2005 Geology and spectral characterization of the basement rocks at Gabal Gerf area, southeastern Egypt

Mohamed Fouad Sadek

Proceedings Volume 5983, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V; 59830Q (2005) https://doi.org/10.1117/12.626806
Event: SPIE Remote Sensing, 2005, Bruges, Belgium

Abstract

Gabal Gerf area in southeastern Egypt is covered by a sequence of Pan-African basement rocks comprising allochthonous ophiolitic rock assemblages thrusted over calc-alkaline metavolcanics and high grade metasediments. These rocks are intruded by syn-to late-tectonic intrusions including gabbro-diorite and tonalite-granodiorite and late tectonic intrusions of layered gabbro and monzogranite as well as dykes and veins. Sheared metamorphosed ultramafic rocks with the locally pillowed basic metavolcanics are the main components of the Gerf huge ophiolitic nappe complex extending between the N-S Hamisana zone and the Heinai Allaqi ophiolitic belt. The processed digital data of Landsat MSS and ETM ratio images covering the study area have been used. The digital number values (pixel values) and the spectral signature curves have been delineated for the different encountered basement rocks on both raw ETM and false colour composite (FCC) ratio images. This study revealed that the TM image bands 7, 4, 2 improves the lithological discrimination of the schistose rocks and massive intrusions and distinguish the linear features (dyke swarms and faults). On the other hand, the different basement rocks exposed in the investigated area particularly the different varieties of the same lithologic unit can be accurately discriminated using the FCC ratio image (5/7, 5/1, 4) in red, green and blue (RGB).

Citation Download Citation

Mohamed Fouad Sadek "Geology and spectral characterization of the basement rocks at Gabal Gerf area, southeastern Egypt", Proc. SPIE 5983, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology V, 59830Q (31 October 2005); https://doi.org/10.1117/12.626806

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available