Texture analysis of aeromagnetic data for enhancing geologic features using co-occurrence matrices in Elallaqi area, South Eastern Desert of Egypt
Eldosouky, A., Elkhateeb, S. (2018). Texture analysis of aeromagnetic data for enhancing geologic features using co-occurrence matrices in Elallaqi area, South Eastern Desert of Egypt. EKB Journal Management System, 7(1), 155-161. doi: 10.1016/j.nrjag.2017.12.006
Ahmed M. Eldosouky; Sayed O. Elkhateeb. "Texture analysis of aeromagnetic data for enhancing geologic features using co-occurrence matrices in Elallaqi area, South Eastern Desert of Egypt". EKB Journal Management System, 7, 1, 2018, 155-161. doi: 10.1016/j.nrjag.2017.12.006
Eldosouky, A., Elkhateeb, S. (2018). 'Texture analysis of aeromagnetic data for enhancing geologic features using co-occurrence matrices in Elallaqi area, South Eastern Desert of Egypt', EKB Journal Management System, 7(1), pp. 155-161. doi: 10.1016/j.nrjag.2017.12.006
Eldosouky, A., Elkhateeb, S. Texture analysis of aeromagnetic data for enhancing geologic features using co-occurrence matrices in Elallaqi area, South Eastern Desert of Egypt. EKB Journal Management System, 2018; 7(1): 155-161. doi: 10.1016/j.nrjag.2017.12.006

Texture analysis of aeromagnetic data for enhancing geologic features using co-occurrence matrices in Elallaqi area, South Eastern Desert of Egypt

NRIAG Journal of Astronomy and Geophysics
Volume 7, Issue 1, June 2018, Pages 155-161    PDF (4.55 M)
DOI: 10.1016/j.nrjag.2017.12.006
Authors
Ahmed M. Eldosouky; Sayed O. Elkhateeb
Abstract
Enhancement of aeromagnetic data for qualitative purposes depends on the variations of texture and amplitude to outline various geologic features within the data. The texture of aeromagnetic data consists continuity of adjacent anomalies, size, and pattern. Variations in geology, or particularly rock magnetization, in a study area cause fluctuations in texture. In the present study, the anomalous features of Elallaqi area were extracted from aeromagnetic data. In order to delineate textures from the aeromagnetic data, the Red, Green, and Blue Co-occurrence Matrices (RGBCM) were applied to the reduced to the pole (RTP) grid of Elallaqi district in the South Eastern Desert of Egypt. The RGBCM are fashioned of sets of spatial analytical parameters that transform magnetic data into texture forms. Six texture features (parameters), i.e. Correlation, Contrast, Entropy, Homogeneity, Second Moment, and Variance, of RGB Co-occurrence Matrices (RGBCM) are used for analyzing the texture of the RTP grid in this study. These six RGBCM texture characteristics were mixed into a single image using principal component analysis. The calculated texture images present geologic characteristics and structures with much greater sidelong resolution than the original RTP grid. The estimated texture images enabled us to distinguish multiple geologic regions and structures within Elallaqi area including geologic terranes, lithologic boundaries, cracks, and faults. The faults of RGBCM maps were more represented than those of magnetic derivatives providing enhancement of the fine structures of Elallaqi area like the NE direction which scattered WNW metavolcanics and metasediments trending in the northwestern division of Elallaqi area.
Keywords
Aeromagnetic Data; CO-occurrence matrices; texture; Elallaqi
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