Regional tectonic controls on basement architecture and oil accumulation within the Muglad basin, Sudan

Fairhead, J. D.; Mazur, Stanisław; Green, Christopher M; Yousif, M. E.

doi:10.1071/aseg2012ab358

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…7). Geophysical investigations of rift systems such as the Muglad basin (Fairhead et al 2012) and the Rio Grande rift (Olsen et al 1987) have indicated the presence of a domed Mohorovicic discontinuity below the axis of the rift, at depths varying from 22 to 33 km. The average 40 km Mohorovicic Discontinuity for the central portion of Az 125° (Fig.…”

Section: The Azimuth 125° Dikes Emplacementmentioning

confidence: 99%

Geophysical reassessment of the Azimuth 125° Lineament: emplacement model and propagation of its dikes

Rocha¹,

Corrêa²,

Silva³

et al. 2019

JGSB

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This study analyzes the area along the Azimuth 125° Lineament (Az 125°) supposed to occur from Rondônia to Rio de Janeiro, in Brazil. The lineament is an important structural feature in association with great carbonatite and kimberlite complexes in Brazil (e.g., Goiás and Alto Paranaíba Alkaline Provinces), consisting of extensive NW-SE oriented faults. The origin of the Az 125° Lineament and its dikes emplacement are widely discussed. The main intention of this work is to propose a model of emplacement of the Az 125° dikes. Also, some important magnetic characteristics of the lineament are presented. The magnetic data clearly define the features of the Az 125° in the southern portion of the study area, but we found no magnetic geophysical evidence that this lineament occurs from the Mato Grosso state to the Rondônia state. The dikes that compose the great Az 125° feature have distinct magnetic attributes, as their polarities (normal and reversed). It is suggested that the alternating polarity is due to local re-magnetization sometime after their intrusion. It is proposed that the dikes were positioned along a zone of lithospheric weakness and their propagation was facilitated due to the occurrence of mid-crustal axial feeder chambers.

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Section: The Azimuth 125° Dikes Emplacementmentioning

confidence: 99%

Geophysical reassessment of the Azimuth 125° Lineament: emplacement model and propagation of its dikes

Rocha¹,

Corrêa²,

Silva³

et al. 2019

JGSB

View full text Add to dashboard Cite

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Structural interpretation of High-resolution aeromagnetic data over the Dahomey basin, Nigeria: implications for hydrocarbon prospectivity

Martins

Onuoha

Okeugo

et al. 2021

J Petrol Explor Prod Technol

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The renewed quest to boost Nigeria’s dwindling reserves through aggressive search for oil and gas deposits in Cretaceous sedimentary basins has re-ignited the need to re-evaluate the hydrocarbon potentials of the Dahomey Basin. Aeromagnetic data are a low-cost geophysical tool deployed in mapping regional basement structures and determination of basement depths and sedimentary thickness in frontier basin exploration. In this study, high-resolution aeromagnetic (HRAM) data covering the Dahomey Basin Nigeria have been interpreted to map the basement structural configuration and to identify mini-basins favorable for hydrocarbon prospectivity. The total magnetic intensity grid was reduced to the equator (RTE) and edge detection filters including first vertical derivative (FVD), total horizontal derivative (THDR), tilt derivative (TDR) and total horizontal derivative of upward continuation (THDR_UC)) were applied to the RTE grid to locate the edges and contacts of geological structures in the basin. Depth to magnetic sources were estimated using the source parameter imaging (SPI) method. Data interpretation results revealed shallow and deep-seated linear features trending in the NNE-SSW, NE-SW, NW-SE and WNW-ESE directions. The SPI map showed a rugged basement topography which depicted a horst-graben architecture on 2D forward models along some selected profiles. Two mini-basins ranging in basement depths between 4.5 – 6.3km were mapped offshore of the study area. It appears the offshore Dahomey Basin holds greater promises for hydrocarbon occurrence due to the presence of thicker succession of sedimentary deposits in the identified mini-basins.

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Main structural lineaments of the southern Cameroon volcanic line derived from aeromagnetic data

Ghomsi

Kana

Arétouyap

et al. 2022

Journal of African Earth Sciences

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Regional tectonic controls on basement architecture and oil accumulation within the Muglad basin, Sudan

Cited by 4 publications

References 7 publications

Geophysical reassessment of the Azimuth 125° Lineament: emplacement model and propagation of its dikes

Geophysical reassessment of the Azimuth 125° Lineament: emplacement model and propagation of its dikes

Structural interpretation of High-resolution aeromagnetic data over the Dahomey basin, Nigeria: implications for hydrocarbon prospectivity

Main structural lineaments of the southern Cameroon volcanic line derived from aeromagnetic data

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