Tilt-depth method: A simple depth estimation method using first-order magnetic derivatives

Salem, Ahmed; Williams, S.; Fairhead, J. D.; Ravat, D.; Smith, Richard S.

doi:10.1190/1.2821934

Cited by 296 publications

(204 citation statements)

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“…The tilt angle applied to the anomaly of the magnetic field reduced to the equator permits to estimate the depth of the upper end of the sources. According to [27] [28]…”

Section: Tilt Angle Approachmentioning

confidence: 99%

Combination of Tilt-Angle and Euler Deconvolution Approaches to Determine Structural Features from Aeromagnetic Data Modeling over Akonolinga-Loum Area (Centre-East, Cameroon)

Yandjimain¹,

Ndougsa‐Mbarga²,

Meying³

et al. 2017

IJG

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Aeromagnetic data for center-east Cameroon between the latitudes 3.5˚ to 4.5˚N and longitudes 12˚ to 12.5˚E are used to further study the subsurface area of this part of the geological Province of Central Africa and the Congo Craton. The GIS and GEOSOFT v6.5 softwares are used to treat the data. This analysis enabled us to explore our study area from surface right to the base. The Tilt Angle method is used to delineate geological structures and to estimate the depth. The Euler's deconvolution method is used to estimate the specific depth of structural contacts. We estimate the northern boundary of the Congo Craton and southern boundary of the Pan-African starting from 3˚7'N of West to 3˚75'N of East. Its depth is estimated around 2.6 km for deep and 0.1 km for shallow while the direction is WSW-ENE and the NW slope varies from 30˚ to 60˚. We obtain that main and minor lineaments exist throughout, from the surface to the base of the area with their principal direction being SW-NE. We also obtain the vertical gradient contact and the quasihorizontal contact. This is proof of the subduction of the Pan-African belt under the Congo Craton due to the intense collision which caused the rejuvenation of the crust. The main consequence of this collision is the formation of pudding 926 International Journal of Geosciences and fold structures, beginning from the superficial part right to the base and which caused the intrusion of schistose, chlorite-schist, quartzite in the micaschist and the intrusions of gneiss and garnetiferous schist in the migmatite. In our study, we highlight the presence of 37 major and 523 minor lineaments that localize the circulation of minerals. The probable slope of the lineaments in the northern part of the region varies from 30˚ to 60˚ in a SE direction while in the southern part, and it varies from 30˚ to 60˚ in a NW direction.

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“…The tilt angle applied to the anomaly of the magnetic field reduced to the equator permits to estimate the depth of the upper end of the sources. According to [27] [28]…”

Section: Tilt Angle Approachmentioning

confidence: 99%

Combination of Tilt-Angle and Euler Deconvolution Approaches to Determine Structural Features from Aeromagnetic Data Modeling over Akonolinga-Loum Area (Centre-East, Cameroon)

Yandjimain¹,

Ndougsa‐Mbarga²,

Meying³

et al. 2017

IJG

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“…Magnetic survey in Mecheri block has been carried out in the NW-SE profile direction with 100 m spacing and 30 m sample spacing along the profile approximately [12]. Traverse was planned perpendicular direction to the major fault which is orienting in the NE-SW direction.…”

Section: Methodsmentioning

confidence: 99%

Spatial Confirmation of Major Lineament and Groundwater Exploration using Ground Magnetic Method near Mecheri Village, Salem District of Tamil Nadu, India

Muthamilselvan¹,

Srimadhi²,

hini³

et al. 2017

J Geol Geophys

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“…The Tilt-derivative method [21], based on a model of a buried 2D vertical contact, provides a relatively simple means to estimate location and strike of geological contacts/faults and depth to basement from RTP (resp. RTE) magnetic anomalies.…”

Section: Methodsmentioning

confidence: 99%

Magnetic Anomaly Interpretation of the Northern Congo Craton Boundary: Results from Depth Estimation and 2.5D Modeling

Antoine¹,

Albert²,

Victor³

et al. 2017

GEP

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A magnetic-based geophysical study was performed across the southern part of Cameroon to investigate the boundary between the Archean Congo craton and the Pan-African metamorphic belt. Magnetic gradient techniques including Euler deconvolution and Tilt derivative have been applied to an aeromagnetic data profile to determine the depth of sources and their lateral extension. 2.5D magnetic modeling shows that the prominent magnetic positive anomalies observed on total magnetic map of south Cameroon are produced by deep and strongly magnetic bodies under the Pan-African formations mainly an important dyke formation structure with a high susceptibility of 0.041 (SI units), at an average depth of 4148 m and with a lateral extension of about 10 km. These bodies are interpreted to have emplaced at high crustal levels in a continental collision zone and were subsequently metamorphosed at granulite grade conditions, during the Pan-African orogeny about 620 Ma ago.

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Tilt-depth method: A simple depth estimation method using first-order magnetic derivatives

Cited by 296 publications

References 0 publications

Combination of Tilt-Angle and Euler Deconvolution Approaches to Determine Structural Features from Aeromagnetic Data Modeling over Akonolinga-Loum Area (Centre-East, Cameroon)

Combination of Tilt-Angle and Euler Deconvolution Approaches to Determine Structural Features from Aeromagnetic Data Modeling over Akonolinga-Loum Area (Centre-East, Cameroon)

Spatial Confirmation of Major Lineament and Groundwater Exploration using Ground Magnetic Method near Mecheri Village, Salem District of Tamil Nadu, India

Magnetic Anomaly Interpretation of the Northern Congo Craton Boundary: Results from Depth Estimation and 2.5D Modeling

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