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Proceedings Paper

Rock discrimination and geological mapping of basement rocks at Gabal Gharib area north eastern desert of Egypt with application of landsat ETM and Egyptsat-1 data
Author(s): Mohamed F. Sadek; Safaa M. Hassan
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Paper Abstract

Gabal Gharib area comprises Late Proterozoic Precambrian basement rocks of metamorphic and magmatic assemblages uncomfortably overlain by Miocene-Holocene sedimentary rocks. The calc-alkaline metamorphosed volcanic rocks are the main rock varieties forming the exposed metamorphic assemblage extruded by Dokhan volcanics and intruded by syn to late to post tectonic magmatic intrusions of gabbro-diorite, tonalite-granodiorite (G1), monzogranites-alkali feldspar granites (G2) and alkaline riebeckite granites (G3). Different band ratio ETM images, Landsat ETM-Egyptsat-1 fused image data with the spectral signature characterizations together with the data of field study were applied to discriminate these different basement rock units. Four granitic varieties as well as the metamorphosed older volcanics and younger Dokhan-type volcanics are well discriminated. This study revealed that the Landsat ETM- Egyptsat-1 fused band ratio image (7/4, 3/7, 4/5) is the best to discriminate the exposed basement rocks and the structural features at Gabal Gharib area.

Paper Details

Date Published: 7 October 2009
PDF: 12 pages
Proc. SPIE 7478, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IX, 74780J (7 October 2009); doi: 10.1117/12.829752
Show Author Affiliations
Mohamed F. Sadek, National Authority for Remote Sensing and Space Sciences (Egypt)
Safaa M. Hassan, National Authority for Remote Sensing and Space Sciences (Egypt)


Published in SPIE Proceedings Vol. 7478:
Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IX
Ulrich Michel; Daniel L. Civco, Editor(s)

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