scholarly journals Aeromagnetic and Landsat-8 data interpretation for structural and hydrothermal alteration mapping along the Central and Southern Eastern Desert boundary, Egypt

2022 ◽  
Vol 25 (1) ◽  
pp. 11-20
Author(s):  
Safwat S. Gabr ◽  
Hassan Diab ◽  
Tharwat A. Abdel Fattah ◽  
Mohamed F. Sadek ◽  
Khalil I. Khalil ◽  
...  
Keyword(s):  
Hydrothermal Alteration ◽  
Data Interpretation ◽  
Eastern Desert ◽  
Landsat 8

Utilizing Landsat-8 and ASTER data in geologic mapping of hyper-arid mountainous region: case of Gabal Batoga area, South Eastern Desert of Egypt

2020 ◽  
Vol 79 (5) ◽  
Author(s):  
Mohamed F. Sadek ◽  
Baher A. El-kalioubi ◽  
Mohamed W. Ali-Bik ◽  
Mariam A. El Hefnawi ◽  
Ahmad A. Elnazer
Keyword(s):  
Eastern Desert ◽  
Landsat 8 ◽  
Mountainous Region ◽  
Geologic Mapping ◽  
Aster Data ◽  
South Eastern

Hydrothermal alteration mapping and structural features in the Guelma basin (Northeastern Algeria): contribution of Landsat-8 data

2019 ◽  
Vol 12 (3) ◽  
Author(s):  
Baya Nait Amara ◽  
Djamal Eddine Aissa ◽  
Saïd Maouche ◽  
Massinissa Braham ◽  
Djamel Machane ◽  
...  
Keyword(s):  
Hydrothermal Alteration ◽  
Structural Features ◽  
Landsat 8 ◽  
Northeastern Algeria

A Comparative Study of Landsat-7 and Landsat-8 Data Using Image Processing Methods for Hydrothermal Alteration Mapping

2016 ◽  
Vol 67 (1) ◽  
pp. 72-88 ◽  
Author(s):  
Feizollah Masoumi ◽  
Taymour Eslamkish ◽  
Mehdi Honarmand ◽  
Ali Akbar Abkar
Keyword(s):  
Image Processing ◽  
Comparative Study ◽  
Hydrothermal Alteration ◽  
Landsat 8 ◽  
Processing Methods ◽  
Landsat 7

scholarly journals HYDROTHERMAL ALTERATION ZONES DETECTION IN LIMNOS ISLAND, THROUGH THE APPLICATION OF REMOTE SENSING

2017 ◽  
Vol 50 (3) ◽  
pp. 1596 ◽  
Author(s):  
A. Anifadi ◽  
Is. Parcharidis ◽  
O. Sykioti
Keyword(s):  
Hydrothermal Alteration ◽  
Field Work ◽  
High Spectral Resolution ◽  
General Distribution ◽  
Spectral Signature ◽  
Landsat 8 ◽  
Alteration Zones ◽  
Multispectral Data ◽  
Band Ratios ◽  
Hydrothermal Alteration Zones

In this study we use Landsat 8 OLI satellite imagery in order to identify and map alteration zones in Limnos island (N. Aegean, Greece). Pre-processing included sea and vegetation masking. In order to enhance spatial resolution, data fusion to 15m is performed. A lineament map is extracted from the panchromatic image that gives the general tectonic view of the island. The detection and mapping of alteration minerals is performed using specific band ratios and consequent composite images. The colour composite using bands 10, 11, 7 (RGB) show the spectral signature and general distribution of silica. Band ratios 6/7, 4/2, 6/5, reveal alteration zones containing iron oxides, clay alteration and ferrous minerals correspondingly. The aforementioned analysis has shown that hydrothermally alteration areas in Limnos are located in the west part of the island and at the Fakos Peninsula, Sardes, Roussopouli and Paradeisi hill. These areas are compared and validated with the reported field work. We conclude that hydrothermal alteration zones can indeed be detected and mapped using medium resolution satellite multispectral data. However, for the identification and mapping of specific types of rocks and minerals, a sensor with high spectral resolution is required. 

scholarly journals Comparison of Different Multispectral Images to Map Hydrothermal Alteration Zones in Kokap, Kulon Progo

2021 ◽  
Vol 6 (2) ◽  
pp. 86
Author(s):  
Bayu Raharja ◽  
Agung Setianto ◽  
Anastasia Dewi Titisari
Keyword(s):  
Remote Sensing ◽  
Hydrothermal Alteration ◽  
Remote Sensing Data ◽  
Component Analysis ◽  
Landsat 8 ◽  
Accuracy Evaluation ◽  
Multispectral Images ◽  
Band Ratio ◽  
Alteration Zones ◽  
Sentinel 2

Using remote sensing data for hydrothermal alteration mapping beside saving time and reducing  cost leads to increased accuracy. In this study, the result of multispectral remote sensing tehcniques has been compare for manifesting hydrothermal alteration in Kokap, Kulon Progo. Three multispectral images, including ASTER, Landsat 8, and Sentinel-2, were compared in order to find the highest overall accuracy using principle component analysis (PCA) and directed component analysis (DPC). Several subsets band combinations were used as PCA and DPC input to targeting the key mineral of alteration. Multispectral classification with the maximum likelihood algorithm was performed to map the alteration types based on training and testing data and followed by accuracy evaluation. Two alteration zones were succeeded to be mapped: argillic zone and propylitic zone. Results of these image classification techniques were compared with known alteration zones from previous study. DPC combination of band ratio images of 5:2 and 6:7 of Landsat 8 imagery yielded a classification accuracy of 56.4%, which was 5.05% and 10.13% higher than those of the ASTER and Sentinel-2 imagery. The used of DEM together with multispectral images was increase the accuracy of hydrothermal alteration mapping in the study area.

scholarly journals Airborne gamma-ray spectrometric data interpretation on Wadi Queih and Wadi Safaga area, Central Eastern Desert, Egypt

2020 ◽  
Vol 9 (1) ◽  
pp. 155-167 ◽  
Author(s):  
Reda A. Y. El Qassas ◽  
M Salaheldin ◽  
S.M. Assran Assran ◽  
Th. Abdel Fattah ◽  
M.A. Rashed
Keyword(s):  
Gamma Ray ◽  
Data Interpretation ◽  
Eastern Desert ◽  
Spectrometric Data ◽  
Central Eastern Desert ◽  
Central Eastern
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