EVALUATION OF DIGITALLY-PROCESSED AERIAL GAMMA RAY SPECTROMETRIC AND MAGNETIC DATA FOR GEOLOGIC MAPPING, MINERAL EXPLORATION AND MONITORING OF ENVIRONMENTAL RADIOACTIVITY, ABU-HAD AREA, CENTRAL EASTERN DESERT, EGYPT
ATEF ALI MAHMOUD ISMAIL;
Abstract
Ismail, Atef Ali Mahmoud. Evaluation of digitally-processed \).erial gamma-ray spectrometric and magnetic data for geologic mapping, mineral exploration and monitoring of environmental radioactivity, Abu Had area,• Central Eastern Desert, Egypt. Ph.D. Thesis, Ain Shams University, Faculty of Science, Geophysics Dept., Cairo, I 999.
The studied Abu-Had area is located in the Central Eastern Desert of
Egypt between latitudes 26° 20' N & 26° 35' Nand longitudes 32° 40' E &
33 20' E and approximates 2800 km2 in surface area. The geology of this area consists, for the most part of exposures, of Cretaceous, Tertiary and Quaternary Wadi sediments. Precambrian metavolcanics, older and younger granites are exposed in' the extreme eastern part of the area under consideration.
The purpose of this study is the analysis, evaluation and interpretation of the aerial radiospectrometric and magnetometric survey data acquired over the Abu-Had area. The interpretation is mainly devoted towards the achievement of three main objectives namely: geological (lithological and structural) mapping, mineral exploration especially uranium-mineral anomalous zones and environmental radiospectrometric monitoring of the area under consideration.
The area under investigation has been involved in the aerial multi channel gamma-ray and magnetic survey conducted by Aero- service Division, Western Geophysical Company of America, in 1983, over a large segment of the Eastern Desert of Egypt, as a part of the mineral, petroleum and ground water assessment program (MPGAP). Conversion of the gridded data of the aerial magnetic and multi-channel gamma-ray survey -conducted over the studied area- to a common image format made it possible to display and manipulate these originally non-imaged data by standard digital image processing techniques. In this way, some interesting false-colour composite images were produced for some selected combinations from the various radiospectrometric parameters. These radiospectrometric composite images offered much in terms of lithologic discrimination based on colour differences and showed distinct efficiency in defining areas where different lithofacies occur.
Application of univariate, bivariate and multivariate statistical methods of analysis have been developed to interpret quantitatively the aerial gamma-ray spectrometric survey data. The integrated results gained from these analyses were presented on two interpreted radiometric-lithologic unit (IRLU) maps. These maps enabled the identification of some significant modifications on the mapped surface geology of the studied area. Twenty-one locations of
The studied Abu-Had area is located in the Central Eastern Desert of
Egypt between latitudes 26° 20' N & 26° 35' Nand longitudes 32° 40' E &
33 20' E and approximates 2800 km2 in surface area. The geology of this area consists, for the most part of exposures, of Cretaceous, Tertiary and Quaternary Wadi sediments. Precambrian metavolcanics, older and younger granites are exposed in' the extreme eastern part of the area under consideration.
The purpose of this study is the analysis, evaluation and interpretation of the aerial radiospectrometric and magnetometric survey data acquired over the Abu-Had area. The interpretation is mainly devoted towards the achievement of three main objectives namely: geological (lithological and structural) mapping, mineral exploration especially uranium-mineral anomalous zones and environmental radiospectrometric monitoring of the area under consideration.
The area under investigation has been involved in the aerial multi channel gamma-ray and magnetic survey conducted by Aero- service Division, Western Geophysical Company of America, in 1983, over a large segment of the Eastern Desert of Egypt, as a part of the mineral, petroleum and ground water assessment program (MPGAP). Conversion of the gridded data of the aerial magnetic and multi-channel gamma-ray survey -conducted over the studied area- to a common image format made it possible to display and manipulate these originally non-imaged data by standard digital image processing techniques. In this way, some interesting false-colour composite images were produced for some selected combinations from the various radiospectrometric parameters. These radiospectrometric composite images offered much in terms of lithologic discrimination based on colour differences and showed distinct efficiency in defining areas where different lithofacies occur.
Application of univariate, bivariate and multivariate statistical methods of analysis have been developed to interpret quantitatively the aerial gamma-ray spectrometric survey data. The integrated results gained from these analyses were presented on two interpreted radiometric-lithologic unit (IRLU) maps. These maps enabled the identification of some significant modifications on the mapped surface geology of the studied area. Twenty-one locations of
Other data
| Title | EVALUATION OF DIGITALLY-PROCESSED AERIAL GAMMA RAY SPECTROMETRIC AND MAGNETIC DATA FOR GEOLOGIC MAPPING, MINERAL EXPLORATION AND MONITORING OF ENVIRONMENTAL RADIOACTIVITY, ABU-HAD AREA, CENTRAL EASTERN DESERT, EGYPT | Other Titles | تقييم المعطيات الجوية الاشعاعية الطيفية والمغناطيسية المعالجة رقميا لخدمة اغراض التخريط الجيولوجى والاستكشاف المعدنى والرصد الاشعاعى البيئى لمنطقة ابو حاد وسط الصحراء الشرقية مصر | Authors | ATEF ALI MAHMOUD ISMAIL | Issue Date | 1999 |
Attached Files
| File | Size | Format | |
|---|---|---|---|
| B13686.pdf | 961.83 kB | Adobe PDF | View/Open |
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