Abstract
The Gabal (G.) El-Niteishat area lies in the Central Eastern Desert of Egypt which is known for various mineral resources and geological structures. Umm Gheig, Umm Naggat, Umm Shaddad, Wadi (W.) Zeidun and Sigdit represent some important regions that contain mineral deposits in the study area. Various filters such as first vertical derivative (FVD), horizontal gradient magnitude (HGM), tilt derivative (TDR) and near-surface were applied to the airborne magnetic data for the study area to deduce the structural lineaments and magnetic source edges which were controlled by the presence of mineral deposits. Processed Landsat ETM+ images are used for delineating the rock unit boundaries that are exposed in the study area such as serpentinite, metagabbro, metavolcanics and metasediments. Also, band ratios, principal component analysis (PCA) and false-color composite image (Crosta alteration image) were applied to get specific results about the alteration zones. The structural lineaments analysis illustrated that the common trends that affected the study area were NW-SE, NE-SW, E-W and N-S. Integration of remote sensing and airborne magnetic data exhibited the relation between mineralization and structural lineaments.
Highlights
The Gabal (G.) El-Niteishat area lies in the Central Eastern Desert of Egypt which is known for various mineral resources and geological structures
Various filters such as first vertical derivative (FVD), horizontal gradient magnitude (HGM), tilt derivative (TDR) and near-surface were applied to the airborne magnetic data for the study area to deduce the structural lineaments and magnetic source edges which were controlled by the presence of mineral deposits
The airborne magnetic survey data of the study area were subjected to various methods of processing and analysis through the application of some integrated magnetic techniques to map the structural lineaments as evidence for mineral exploration, these techniques include first vertical derivative (FVD), horizontal gradient magnitude (HGM), tilt derivative (TDR) and near-surface
Summary
The geologic setting of the study area is mainly based on the geology of Hamata, Egypt of scale 1:500,000 (Conoco Coral and EGPC, 1987) [14] and metallogenic map of Aswan quadrangle, Egypt [15] (Figure 1). The study area is characterized by groups of geological structures related in the concentration deposit mineralizations as gold (Au), chromium (Cr), lead (Pb), zinc (Zn), iron (Fe), copper (Cu) and many other economic minerals. Some of the most important regions in this area, which must be studied carefully because they contain gatherings of economic ore deposits are Umm Gheig, Umm Naggat, Umm Shaddad, Wadi (W.) Sitra, W. The study area includes many minor structural features associated with ore deposits and mineralization, these minor structures are related to the major structures in the area such as the Arabian Nubian Shield (ANS) and Najd faults zone. In the Central Eastern Desert, the fold-related faults are common and associated with pull-apart connected to the Najd system [20]. Fluid infiltration accompanying superstructure deformation and infrastructure magmatism were responsible for generating most of ED gold deposits [21]
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