Importance of Aeromagnetics in Evaluation of Structural Control of Mineralization*

Domzalski, W.

doi:10.1111/j.1365-2478.1966.tb01761.x

Cited by 21 publications

(6 citation statements)

References 4 publications

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“…An observed magnetic pattern represented on magnetic contour map is the reflection of the contrasts in magnetic properties of rocks. The observed structural features of the area are reflected significantly in the pattern, where the trends and intensities of magnetic anomalies are shown on the aeromagnetic maps (Danzalski, 1966). Fig.…”

Section: Reduction To Pole Filtermentioning

confidence: 95%

Magnetic survey for delineating subsurface structures and estimating magnetic sources depth, Wadi Fatima, KSA

Al‐Garni

2010

Journal of King Saud University - Science

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The studied area is characterized by having complex structures that trend mainly in the NNW-SSE, N-S and E-W to ENE-WSW directions. Magnetic survey is used to delineate the subsurface structures and to estimate the magnetic sources depth of the selected area in Wadi Fatima, Saudi Arabia. Reduction to pole (RTP), 3D Euler deconvolution, and edge enhancement using standard deviation filters have been applied in order to achieve the above mentioned goals. Edge enhancement using standard deviation is mainly used to delineate the subsurface structures while the 3D Euler deconvolution is used not only to delineate major subsurface structures but also to determine the structural indices of them as well as the average depth of the magnetic sources. The calculated structural indices show that the area is mainly affected by contacts/thin sheet and the estimated depth of magnetic sources ranged between %15 m and %31 m.This study has given a clear picture of the geologic structures beneath the study area as well as guidance for geoelectric studies necessary for groundwater and engineering investigations.

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Section: Reduction To Pole Filtermentioning

confidence: 95%

Magnetic survey for delineating subsurface structures and estimating magnetic sources depth, Wadi Fatima, KSA

Al‐Garni

2010

Journal of King Saud University - Science

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“…An observed magnetic pattern represented on magnetic contour map is the reflection of the contrast between the magnetic properties of rocks. The observed structural features of the area are reflected significantly in the pattern, where the trends and intensities of magnetic anomalies are shown on the aeromagnetic maps (Danzalski, 1966). The direction of the various trends of the lineaments along each of the magnetic anomalies ( Fig.6), were measured taking into account the azimuth, the length and number of the magnetic trends in each 10 degrees, and presented on a polar plot (by Grapher software, Fig.…”

Section: Trend Analysismentioning

confidence: 99%

Aeromagnetic Data Interpretation of Wadi Hawashiya Area for Identifying Surface and Subsurface Structures, North Eastern Desert, Egypt

Soliman¹,

Hassanein²

2009

ear

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The studied area is located within the North Eastern Desert of Egypt. The lithology of this area comprises rocks related to Precambrian, Cambrian, Carboniferous, Albian to Cenomanian, Late Cenomanian to Early Turonian and Quaternary. Aeromagnetic data are fully analyzed and interpreted where the analysis and interpretation are mainly devoted towards outlining significant surface and subsurface tectonic trends and their relationship with T.C. radiometric anomalous zones. According to the qualitative interpretation of the geological and aeromagnetic, and its shaded relief maps, the lineament structural map is constructed through the signatures of the contours and shaded relief of the total aeromagnetic data. Werner de-convolution (dyke model) was applied to the aeromagnetic anomaly map. The depth estimates calculated for these major magnetic anomalies range between 0.5 and 3.9 km. lineament structural map and magnetic depth map values have been utilized to construct the interpretation of the main subsurface structures affecting the studied area, which correlate with the previous studies of aeroradiomtric anomalous zones allover the study area. The obtained results showed the most significant structural trends affecting the distribution of these radiometric anomalies in the present study area. Four main tectonic trends are outlined from the total aeromagnetic and shading relief maps. These trends were defined as N60E, N45W and E-W.

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“…The horizontal edges and boundaries of magnetic bodies often indicate subsurface lithological contacts, fractures, and different tectonic characteristics, which are helpful for interpreting geological features (Eldosouky et al, 2020). According to Domzalski (1966), the analysis of magnetic anomalies can be used to map lineaments, deep contacts, depth of sediment cover and mineralization.…”

Section: Introductionmentioning

confidence: 99%

Structural Mapping of Kakobola and Its Surroundings by Analyzing Geomagnetic Data

Muliwavyo,

Musitu

et al. 2023

GEP

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This study focuses on the Kakobola region and its surroundings where cavities discovered in its basement may represent a major risk for the hydroelectric dam erected on the Lufuku River near the Kakobola city and the civil engineering works in the study area. In order to deepen the studies related to this understudied region and provide decision-makers with information that will enable them to make the necessary and appropriate decisions regarding the development of this area, a study based on the analysis of geomagnetic data was carried out using certain methods revealing more shallow than deep structures, and others highlighting the limits of both shallower and deeper structures. Total magnetic anomalies and reduced to equator (RTE) magnetic anomalies were used to map the subsurface of the Kakobola region and its surroundings. In order to detect the edges of magnetized structures, the horizontal gradient magnitude (HGM), the analytic signal (AS), the horizontal gradient of tilt angle (HGTA), the tilt angle (TA), the theta map (TM), the enhanced total horizontal derivative of the tilt angle (ETHDR), the tilt angle of the horizontal gradient (TAHG), and the tilt angle of analytic signal (TAAS) were used. The study area is characterized by two areas of low values of magnetic anomalies and two other sources of high magnetic anomalies located in the bed and the neighborhood of the two major rivers in the region. The shallow sources of magnetic anomalies are lying in the bed and the vicinity of the same rivers in the study area. The magnetic sources in the study area are connected and almost linear. Several magnetic lineaments identified in this region by different methods present several preferential directions, but the most predominant directions are NE-SW, NW-SE, W-E and NE-SW.

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Importance of Aeromagnetics in Evaluation of Structural Control of Mineralization*

Cited by 21 publications

References 4 publications

Magnetic survey for delineating subsurface structures and estimating magnetic sources depth, Wadi Fatima, KSA

Magnetic survey for delineating subsurface structures and estimating magnetic sources depth, Wadi Fatima, KSA

Aeromagnetic Data Interpretation of Wadi Hawashiya Area for Identifying Surface and Subsurface Structures, North Eastern Desert, Egypt

Structural Mapping of Kakobola and Its Surroundings by Analyzing Geomagnetic Data

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