A comparative study of THG, AS, TA, Theta, TDX and LTHG techniques for improving source boundaries detection of magnetic data using synthetic models: A case study from G. Um Monqul, North Eastern Desert, Egypt

Eldosouky, AM; Pham, LT; Mohmed, H; Pradhan, B

A comparative study of THG, AS, TA, Theta, TDX and LTHG techniques for improving source boundaries detection of magnetic data using synthetic models: A case study from G. Um Monqul, North Eastern Desert, Egypt

Eldosouky, AM Pham, LT Mohmed, H Pradhan, B

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: Journal of African Earth Sciences, 2020, 170, pp. 103940-103940
Issue Date:: 2020-10-01

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Field	Value	Language
dc.contributor.author	Eldosouky, AM
dc.contributor.author	Pham, LT
dc.contributor.author	Mohmed, H
dc.contributor.author	Pradhan, B https://orcid.org/0000-0001-9863-2054
dc.date.accessioned	2020-10-14T06:00:02Z
dc.date.available	2020-10-14T06:00:02Z
dc.date.issued	2020-10-01
dc.identifier.citation	Journal of African Earth Sciences, 2020, 170, pp. 103940-103940
dc.identifier.issn	1464-343X
dc.identifier.issn	1879-1956
dc.identifier.uri	http://hdl.handle.net/10453/143242
dc.description.abstract	© 2020 Elsevier Ltd The boundaries detection techniques have a great role in enhancing and interpreting the geologic features of magnetic data. In the literature, several filters (THG, AS, TA, NTilt, Theta, TDX, TAHG, LTHG) for identifying the boundaries of the magnetic sources have been suggested. These methods are generally performed based on gradients (vertical and horizontal) of the potential field. This paper presents a comparative investigation of different boundary detection filters including THG (total horizontal gradient), AS (analytical signal), TA (tilt angle), Theta (Cos θ), TDX (horizontal tilt angle), and LTHG (Logistic function of the THG). The effect of each filter was examined on two synthetic magnetic data sets. Moreover, the filters are also applied to a real magnetic data set from the Gabal (G) Um Monqul, North Eastern Desert (NED) of Egypt. The obtained results were correlated with known geologic structures of the study area. From the comparison between several applied methods, the horizontal boundaries of geologic sources obtained by the LTHG were found to be sharper and clearer than other ones. The results confirm that the LTHG method is an effective filter for interpreting aeromagnetic data qualitatively and can be applied for enhancing the source edges of different potential field datasets.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	Journal of African Earth Sciences
dc.relation.isbasedon	10.1016/j.jafrearsci.2020.103940
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0403 Geology, 0404 Geophysics
dc.title	A comparative study of THG, AS, TA, Theta, TDX and LTHG techniques for improving source boundaries detection of magnetic data using synthetic models: A case study from G. Um Monqul, North Eastern Desert, Egypt
dc.type	Journal Article
utslib.citation.volume	170
utslib.for	0403 Geology
utslib.for	0404 Geophysics
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Information, Systems and Modelling
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2020-10-14T05:59:51Z
pubs.publication-status	Published
pubs.volume	170

Abstract:

© 2020 Elsevier Ltd The boundaries detection techniques have a great role in enhancing and interpreting the geologic features of magnetic data. In the literature, several filters (THG, AS, TA, NTilt, Theta, TDX, TAHG, LTHG) for identifying the boundaries of the magnetic sources have been suggested. These methods are generally performed based on gradients (vertical and horizontal) of the potential field. This paper presents a comparative investigation of different boundary detection filters including THG (total horizontal gradient), AS (analytical signal), TA (tilt angle), Theta (Cos θ), TDX (horizontal tilt angle), and LTHG (Logistic function of the THG). The effect of each filter was examined on two synthetic magnetic data sets. Moreover, the filters are also applied to a real magnetic data set from the Gabal (G) Um Monqul, North Eastern Desert (NED) of Egypt. The obtained results were correlated with known geologic structures of the study area. From the comparison between several applied methods, the horizontal boundaries of geologic sources obtained by the LTHG were found to be sharper and clearer than other ones. The results confirm that the LTHG method is an effective filter for interpreting aeromagnetic data qualitatively and can be applied for enhancing the source edges of different potential field datasets.

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http://hdl.handle.net/10453/143242