Potential-Field Filters for Gravity and Magnetic Interpretation: A Review

Demarco, Pablo Núñez; Bonilla, A.; Sánchez-Bettucci, L.; Prezzi, Claudia Beatriz

doi:10.1007/s10712-022-09752-x

Cited by 13 publications

(7 citation statements)

References 215 publications

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Section: Directional Derivativesmentioning

confidence: 99%

“…We calculated the directional derivatives in the space domain. However, computation in the space domain is still preferred in certain conditions and applications, especially to smooth noisy signals (Demarco et al., 2023). From the Bouguer gravity map of the study area (Figure 5 a,b), We calculated the first horizontal directional derivative (FHD), the second horizontal directional derivative (SHD), and matched between the results of both.…”

Section: Gravity Data Analysismentioning

confidence: 99%

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Analysis of legacy gravity data reveals sediment‐filled troughs buried under Flathead Valley, Montana, USA

Gebril,

Khalil,

Joeckel

et al. 2024

Near Surface Geophysics

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Shallow, dominantly silt‐ and clay‐filled erosional troughs in Quaternary sediments under the Flathead Valley (northwestern Montana, USA) are very likely to be hydraulic barriers limiting the horizontal flow of groundwater. Accurately mapping them is important because of increasing demand for groundwater. We used a legacy Bouguer gravity map measured in 1968. The directional derivatives of the map are computed, and the map was enhanced by implementing edge detection tools. We produced generalized derivative, maximum horizontal gradient, total gradient and tilt gradient maps through two‐dimensional Fourier transform analysis. These maps were remarkably successful in locating buried troughs in the northern and northwestern parts of the study area, closely matching locations determined previously from compiled borehole data. Our results also identify hitherto unknown extensions of troughs and indicate that some of the buried troughs may be connected.

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Section: Directional Derivativesmentioning

confidence: 99%

Section: Gravity Data Analysismentioning

confidence: 99%

Analysis of legacy gravity data reveals sediment‐filled troughs buried under Flathead Valley, Montana, USA

Gebril,

Khalil,

Joeckel

et al. 2024

Near Surface Geophysics

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“…If an appropriate fit does not occur, changing the model parameters and repeating the calculations will continue to achieve a fit with the least possible error (Jacobsen, 1987;Loke & Barker, 1996;Talwani & Ewing, 1960;Telford et al, 1990). As the application of gravimetric methods in recent years, a new approach has been developed by Essa et al (2018) to depict the fault lineaments and pertinent tectonic evidence of the Sinai Peninsula, Egypt, from gravity and magnetic data derived from the geologic information as well as the regional and residual gravity and magnetic maps (Essa et al, 2018;Núñez-Demarco et al, 2022). Moreover, the numerous application of the gravity method in oil, gas, ores, and minerals exploration, engineering applications, and ancient geothermal civilization were investigated (Essa & Géraud, 2020).…”

Section: Introductionmentioning

confidence: 99%

Boundaries Determination in Potential Field Anomaly Utilizing Analytical Signal Filtering and its Vertical Derivative in Qeshm Island SE Iran

Hosseini

Khah²,

Kianoush

et al. 2023

Preprint

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The analytical signal method and its derivatives can be explicitly calculated and assessed for analyzing and estimating the boundary of geological structures, such as faults or dikes, from potential field anomalies. Gravity field of the east of Qeshm Island and its north coast from Sarkhun to Latidan in SE Iran has been measured in one-kilometer regular network. The regional anomaly effects are deducted from the Bouguer anomaly, where it can get the residual anomalies which is the considered dataset used in this study. The Bouguer range is -297 to -330 milligals (mGal) applying filters and modeling. It was revealed that there are five negative anomalies caused by salt penetration in the region. Regional anomalies expectedly have a low spatial frequency and long wavelengths, while the residual anomalies associated with shallow sub-surface potentials have high spatial frequencies and short-wave wavelengths. Two different fault trends were observed comparing the artificial model using MATLAB coding, the real one, and the filtered residual anomaly map of the Qeshm region. Also, another fault trend is suggested in the east height of Oman, which is a possible place of salt penetration. Due to the limited dimensions (120 * 100 km) and the information obtained from the existing drillings, the depth of the anomaly resources can be examined up to 8 km. Due to the gravitational condition between the two domes of Qeshm saline and the bridge located in the Hara saline area, it is suggested to be considered as an area for further oil exploration routines.

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“…The developed scheme has been verified on various noise-free synthetic models (Essa, Mehanee, et al, 2021). As another application of gravimetric methods in recent years, a new approach has been developed to depict the fault lineaments and pertinent tectonic evidence of the Sinai Peninsula, Egypt, from gravity and magnetic data derived from the geologic information as well as the regional and residual gravity and magnetic maps (Essa et al, 2018;Núñez-Demarco et al, 2022). Moreover, the numerous application of the gravity method in oil, gas, ores, and minerals exploration, engineering applications, and ancient geothermal civilization were investigated (Essa & Géraud, 2020).…”

Section: Introductionmentioning

confidence: 99%

Tilt Angle Filter Effect on Noise Cancelation and Structural Edges Detection in Hydrocarbon Sources in a Gravitational Potential Field

Hosseini

Farajkhah²,

Kianoush

et al. 2023

Preprint

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Potential-Field Filters for Gravity and Magnetic Interpretation: A Review

Cited by 13 publications

References 215 publications

Analysis of legacy gravity data reveals sediment‐filled troughs buried under Flathead Valley, Montana, USA

Analysis of legacy gravity data reveals sediment‐filled troughs buried under Flathead Valley, Montana, USA

Boundaries Determination in Potential Field Anomaly Utilizing Analytical Signal Filtering and its Vertical Derivative in Qeshm Island SE Iran

Tilt Angle Filter Effect on Noise Cancelation and Structural Edges Detection in Hydrocarbon Sources in a Gravitational Potential Field

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