Gravity And Magnetic Data Reduction Software (GraMag2DCon) For Sites Characterization
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Date
2015-10
Authors
Ismail, Noer El Hidayah
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Abstract
Present potential field methods software are focuses more on data interpretation and analysis which resulted in the lack of data processing software for potential field methods. This caused processing gravity and magnetic methods become a tedious task as one will opted either to manually process the data or used the complicated software which focuses more on data modeling and filtering. By developing new software named GraMag2DCon which include the combination of both gravity and magnetic data processing, data processing for potential field methods will be much easier. GraMag2DCon software includes importing and exporting the data, as well as able to edit any data during data processing. This software also able to alert the user if any error or mistakes occur during data processing which can save a lot of time. As the objectives of the study is to identify and characterized gravity and magnetic values of different geological settings, data acquisition of both gravity and magnetic methods are done in granitic area (Universiti Sains Malaysia, Pulau Pinang), sedimentary area (Kaki Bukit, Perlis), limestone area (Batu Caves, Kuala Lumpur), archaeological sites (Lembah Bujang, Kedah) and meteorite impact region (Bukit Bunuh, Perak). Using GraMag2DCon software, all of the data collected were processed so that gravity and magnetic values for different types of geological area can be identified and characterized. Theoretically, granitic area will give higher values of both gravity and magnetic values as granitic rocks is much denser compare to sedimentary and limestone rock and has high magnetite contents in it. The results achieved from the study areas are similar to the theory, where any study area with granitic area gives high values of Bouguer anomaly and magnetic residual. Furthermore, factors such as ancient structures exist in Lembah Bujang, Kedah and meteorite impact region in Bukit Bunuh, Perak also influenced the gravity and magnetic values. Rock fracturing and rock melting also affect the gravity and magnetic values as it will modify the geology of the area.
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Physics (General)