A Novel Enhanced Total Gradient (ETG) for Interpretation of Magnetic Data
Abstract
:1. Introduction
2. Previous Edge Detection Studies
3. Proposed Method
4. Validating the Response of the ETG Filter
4.1. ETG Response over 2D Dipping Dyke
4.2. ETG Response over 3D Magnetic Sources
5. Application of ETG over Aeromagnetic Data of Seattle Uplift (SU), USA
5.1. Study Region
5.2. Aeromagnetic Data
5.3. Results and Discussion
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
- Eldosouky, A.M.; Abdelkareem, M.; Elkhateeb, S.O. Integration of remote sensing and aero-magnetic data for mapping structural features and hydrothermal alteration zones in Wadi Allaqi area, South Eastern Desert of Egypt. J. Afr. Earth Sci. 2017, 130, 28–37. [Google Scholar] [CrossRef]
- Hang, N.T.; Thanh, D.D.; Minh, L.H. Application of directional derivative method to determine boundary of magnetic sources by total magnetic anomalies. Vietnam J. Earth Sci. 2017, 39, 360–375. [Google Scholar] [CrossRef] [Green Version]
- Pham, L.T.; Oksum, E.; Kafadar, O.; Trinh, P.T.; Nguyen, D.V.; Vo, Q.T.; Le, S.T.; Do, T.D. Determination of subsurface lineaments in the Hoang Sa islands using enhanced methods of gravity total horizontal gradient. Vietnam J. Earth Sci. 2022, 44, 395–409. [Google Scholar] [CrossRef]
- Pham, L.T.; Oliveira, S.P.; Eldosouky, A.M.; Abdelrahman, K.; Fnais, M.S.; Xayavong, V.; Andráš, P.; Le, D.V. Determination of structural lineaments of Northeastern Laos using the LTHG and EHGA methods. J. King Saud Univ.-Sci. 2022, 34, 101825. [Google Scholar] [CrossRef]
- Eldosouky, A.M.; Pham, L.T.; Henaish, A. High precision structural mapping using edge filters of potential field and remote sensing data: A case study from Wadi Umm Ghalqa area, South Eastern Desert, Egypt. Egypt. J. Remote Sens. Space Sci. 2022, 25, 501–513. [Google Scholar] [CrossRef]
- Eldosouky, A.M.; Pham, L.T.; Abdelrahman, K.; Fnais, M.S.; Gomez-Ortiz, D. Mapping structural features of the Wadi Umm Dulfah area using aeromagnetic data. J. King Saud Univ.-Sci. 2022, 34, 101803. [Google Scholar] [CrossRef]
- Soleimani, M.; Aghajani, H.; Heydari-Nejad, S. Salt dome boundary detection in seismic image via resolution enhancement by the improved NFG method. Acta Geod. Et Geophys. 2018, 53, 463–478. [Google Scholar] [CrossRef]
- Soleimani, M.; Aghajani, H.; Heydari-Nejad, S. Structure of giant buried mud volcanoes in the South Caspian Basin: Enhanced seismic image and field gravity data by using normalized full gradient method. Interpretation 2018, 6, T861–T872. [Google Scholar] [CrossRef]
- Nasuti, Y.; Nasuti, A.; Moghadas, D. STDR: A novel approach for enhancing and edge detection of potential field data. Pure Appl. Geophys. 2019, 176, 827–841. [Google Scholar] [CrossRef]
- Pham, L.T. A comparative study on different filters for enhancing potential field source boundaries: Synthetic examples and a case study from the Song Hong Trough (Vietnam). Arab. J. Geosci. 2020, 13, 1–10. [Google Scholar] [CrossRef]
- Prasad, K.N.D.; Pham, L.T.; Singh, A.P. Structural mapping of potential field sources using BHG filter. Geocarto Int. 2022, 1–28. [Google Scholar] [CrossRef]
- Prasad, K.N.D.; Pham, L.T.; Singh, A.P. A Novel Filter “ImpTAHG” for Edge Detection and a Case Study from Cambay Rift Basin, India. Pure Appl. Geophys. 2022, 179, 2351–2364. [Google Scholar] [CrossRef]
- Cordell, L.; Grauch, V.J.S. Mapping Basement Magnetisation Zones from Aeromagnetic Data in the San Juan Basin, New Mexico. In The Utility of Regional Gravity and Magnetic Anomaly Maps; Society of Exploration Geophysicists: Houston, TX, USA, 1985; Chapter 16; pp. 181–197. [Google Scholar]
- Roest, W.R.J.; Verhoef; Pilkington, M. Magnetic interpretation using the 3-D analytic signal. Geophysics 1992, 57, 116–125. [Google Scholar] [CrossRef]
- Miller, H.G.; Singh, V. Potential field tilt-A new concept for location of potential field sources. J. Appl. Geophys. 1994, 32, 213–217. [Google Scholar] [CrossRef]
- Verduzco, B.; Fairhead, J.D.; Green, C.M.; MacKenzie, C. New insights into magnetic derivatives for structural mapping. Lead. Edge 2004, 23, 116–119. [Google Scholar] [CrossRef]
- Wijns, C.; Perez, C.; Kowalczyk, P. Theta map: Edge detection in magnetic data. Geophysics 2005, 70, 39–43. [Google Scholar] [CrossRef]
- Cooper, G.R.J.; Cowan, D.R. Enhancing potential field data using filters based on the local phase. Comput. Geosci. 2006, 32, 1585–1591. [Google Scholar] [CrossRef]
- Ferreira, F.J.F.; Jeferson, D.S.; Alessandra, D.B.E.S.B.; Luis, G.D.C. Enhancement of the total horizontal gradient of magnetic anomalies using the tilt angle. Geophysics 2013, 78, J33–J41. [Google Scholar] [CrossRef]
- Eshaghzadeh, A.; Dehghanpour, A.; Kalantari, R.A. Application of the tilt angle of the balanced total horizontal derivative filter for the interpretation of potential field data. Boll. Di Geofis. Teor. Ed Appl. 2018, 59, 161–178. [Google Scholar]
- Cooper, G.R.J. Reducing the dependence of the analytic signal amplitude of aeromagnetic data on the source vector direction. Geophysics 2014, 79, J55–J60. [Google Scholar] [CrossRef]
- Pham, L.T.; Vu, T.V.; Le, T.S.; Trinh, P.T. Enhancement of potential field source boundaries using an improved logistic filter. Pure Appl. Geophys. 2020, 177, 5237–5249. [Google Scholar] [CrossRef]
- Eldosouky, A.M.; Pham, L.T.; 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. J. Afr. Earth Sci. 2020, 170, 103940. [Google Scholar] [CrossRef]
- Pham, L.T.; Le-Huy, M.; Oksum, E.; Do, T.D. Determination of maximum tilt angle from analytic signal amplitude of magnetic data by the curvature-based method. Vietnam J. Earth Sci. 2018, 40, 354–366. [Google Scholar]
- Pham, L.T. A high-resolution edge detector for interpreting potential field data: A case study from the Witwatersrand basin, South Africa. J. Afr. Earth Sci. 2021, 178, 104190. [Google Scholar] [CrossRef]
- Wang, X. Laplacian operator-based edge detectors. IEEE Trans. Pattern Anal. Mach. Intell. 2007, 29, 886–890. [Google Scholar] [CrossRef]
- Oppenheim, A.V.; Schafer, R.W. Digital Signal Processing; Research supported by the Massachusetts Institute of Technology, Bell Telephone Laboratories, and Guggenheim Foundation; Prentice-Hall, Inc.: Englewood Cliffs, NJ, USA, 1975; pp. 1–598. [Google Scholar]
- Nasuti, Y.; Nasuti, A. NTilt as an improved enhanced tilt derivative filter for edge detection of potential field anomalies. Geophys. J. Int. 2018, 214, 36–45. [Google Scholar] [CrossRef]
- Pham, L.T.; Oksum, E.; Do, T.D.; Nguyen, D.V.; Eldosouky, A.M. On the performance of phase-based filters for enhancing lateral boundaries of magnetic and gravity sources: A case study of the Seattle Uplift. Arab. J. Geosci. 2021, 14, 1–11. [Google Scholar] [CrossRef]
- Oksum, E.; Le, D.V.; Vu, M.D.; Nguyen, T.H.T.; Pham, L.T. A novel approach based on the fast sigmoid function for interpretation of potential field data. Bull. Geophys. Oceanogr. 2021, 62, 543–556. [Google Scholar]
- Blakely, R.J.; Sherrod, B.L.; Hughes, J.F.; Anderson, M.L.; Wells, R.E.; Weaver, C.S. Saddle Mountain fault deformation zone, Olympic Peninsula, Washington: Western boundary of the Seattle uplift. Geosphere 2009, 5, 105–125. [Google Scholar] [CrossRef] [Green Version]
- Pratt, T.L.; Johnson, S.; Potter, C.; Stephenson, W.; Finn, C. Seismic reflection images beneath Puget Sound, western Washington State: The Puget Lowland thrust sheet hypothesis. J. Geophys. Res. Solid Earth 1997, 102, 27469–27489. [Google Scholar] [CrossRef]
- Wells, R.E.; Weaver, C.S.; Blakely, R.J. Fore-arc migration in Cascadia and its neotectonic significance. Geology 1998, 26, 759–762. [Google Scholar] [CrossRef]
- Lamb, A.P.; Liberty, L.M.; Blakely, R.J.; Pratt, T.L.; Sherrod, B.L.; van Wijk, K. Western limits of the Seattle fault zone and its interaction with the Olympic Peninsula, Washington. Geosphere 2012, 8, 915–930. [Google Scholar] [CrossRef] [Green Version]
- Liberty, L.M.; Pratt, T.L. Structure of the eastern Seattle fault zone, Washington State: New insights from seismic reflection data. Bull. Seismol. Soc. Am. 2008, 98, 1681–1695. [Google Scholar] [CrossRef]
- Johnson, S.Y.; Potter, C.J.; Armentrout, J.M. Origin and evolution of the Seattle fault and Seattle basin, Washington. Geology 1994, 22, 71–74. [Google Scholar] [CrossRef]
- Hutchinson, I. Geoarchaeological perspectives on the “Millennial Series” of earthquakes in the southern Puget Lowland, Washington, USA. Radiocarbon 2015, 57, 917–941. [Google Scholar] [CrossRef]
- Blakely, R.J.; Wells, R.E.; Weaver, C.S. Puget Sound Aeromagnetic Maps and Data, U.S. Geological Survey Open File Report, No. 99–514; 1999. Available online: https://pubs.usgs.gov/of/1999/of99-514 (accessed on 18 January 2022).
- Haug, B.J. High Resolution Seismic Reflection Interpretations of the Hood Canal-Discovery Bay Fault Zone. Master’s Thesis, Department of Geology, Portland State University, Puget Sound, Washington, DC, USA, 1998. [Google Scholar]
Method (Reference) | Quantity Related to Edge | Advantages | Limitations |
---|---|---|---|
[13] | Maximum | 1. Less sensitive to noise. | 1. Poor performance in balancing the signals from shallow and deep anomalies. 2. Require magnetic reduction-to-the-pole |
[14] | Maximum | 1. Less dependent on the direction of the magnetization vector | 1. Poor performance in balancing the signals from shallow and deep anomalies. |
[15] | Zero | 1. Can generate a balanced image for the sources situated at different depths. | 1. Require magnetic reduction-to-the-pole. 2. Produces secondary edges around the true edge. |
[16] | Maximum | 1. The method enhances the maximum horizontal gradients in low wavelength anomalies. | 1. Require magnetic reduction-to-the-pole. 2. Produces secondary edges around the true edge. |
[17] | Minimum | 1. The TM filter produces balances between edges located at different source depths. | 1. Require magnetic reduction-to-the-pole. 2. Produces secondary edges around the true edge. |
[18] | Maximum | 1. Can generate a balanced image for the sources situated at different depths. | 1. Require magnetic reduction-to-the-pole 2. Produces secondary edges around the true edge |
[18] | Maximum | 1. Can generate a balanced image for the sources situated at different depths. | 1. Require magnetic reduction-to-the-pole 2. Produces secondary edges around the true edge. |
[19] | Maximum | 1. Can generate a balanced image for the sources situated at different depths. | 1. Detected edges have low resolution. 2. Require magnetic reduction-to-the-pole |
where [20] | Maximum | 1. Can generate a balanced image for the sources situated at different depths. | 1. Detected edges have low resolution. 2. Require magnetic reduction-to-the-pole |
[21] | Maximum | 1. Perform is same on the datasets situated at different latitudes. | 1. Detected edges have low resolution. |
Parameter | P1 | P2 | P3 | P4 | P5 | P6 | P7 | P8 | P9 | P10 |
---|---|---|---|---|---|---|---|---|---|---|
X-center (km) | 30 | 90 | 60 | 110 | 160 | 95 | 95 | 170 | 170 | 170 |
Y-center (km) | 110 | 175 | 25 | 25 | 25 | 110 | 110 | 150 | 110 | 70 |
Width (km) | 10 | 160 | 30 | 30 | 30 | 50 | 80 | 30 | 15 | 10 |
Height (km) | 160 | 7 | 30 | 30 | 30 | 50 | 80 | 15 | 15 | 10 |
Top Depth (km) | 2 | 2 | 3 | 2 | 1 | 5 | 10 | 3 | 2 | 1 |
Thickness (km) | 5 | 5 | 3 | 3 | 3 | 3 | 5 | 1 | 2 | 3 |
Susceptibility (SI) | −0.02 | 0.02 | 0.02 | −0.021 | 0.02 | −0.026 | 0.028 | 0.023 | −0.021 | 0.022 |
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Prasad, K.N.D.; Pham, L.T.; Singh, A.P.; Eldosouky, A.M.; Abdelrahman, K.; Fnais, M.S.; Gómez-Ortiz, D. A Novel Enhanced Total Gradient (ETG) for Interpretation of Magnetic Data. Minerals 2022, 12, 1468. https://doi.org/10.3390/min12111468
Prasad KND, Pham LT, Singh AP, Eldosouky AM, Abdelrahman K, Fnais MS, Gómez-Ortiz D. A Novel Enhanced Total Gradient (ETG) for Interpretation of Magnetic Data. Minerals. 2022; 12(11):1468. https://doi.org/10.3390/min12111468
Chicago/Turabian StylePrasad, Korimilli Naga Durga, Luan Thanh Pham, Anand P. Singh, Ahmed M. Eldosouky, Kamal Abdelrahman, Mohammed S. Fnais, and David Gómez-Ortiz. 2022. "A Novel Enhanced Total Gradient (ETG) for Interpretation of Magnetic Data" Minerals 12, no. 11: 1468. https://doi.org/10.3390/min12111468