TITLE:
Evaluation of Structural Framework and Depth Estimates Using High Resolution Airborne Magnetic Data over Some Parts of Middle Benue Trough, Nigeria
AUTHORS:
Nasir Naeem Abdulsalam, Ene Kate Ogoh, Oluwatoyin Ologe
KEYWORDS:
Hydrocarbon, Magnetic Sources, Derivatives Maps, Anomaly, Sedimentary Thickness, Maturation
JOURNAL NAME:
International Journal of Geosciences,
Vol.13 No.7,
July
29,
2022
ABSTRACT: High-resolution aeromagnetic data of parts of Middle Benue Trough,
Nigeria (sheets 212, 213, 233 and 234) was interpreted by applying source
Parameter Imaging (SPI) and Spectral Depth analysis with the aim of mapping out
the magnetic lineaments and analysing magnetic signals coming from different
sources. The results from the derivatives maps show major and minor lineaments
trends in the NE-SW and NW-SE directions respectively. Results from SPI show
the maximum sedimentary thickness of about -4546.7 m (-4.5467 km) around the region of Awe, Aman, Langtang
south, Gassol and the north-eastern part of Donga. Minimum depth of -167.9 m (-0.1679 km) around the region
of north of Shendam, north of Wase, north-eastern part of Aman, Bantaji, Donga,
Ibi and Bali. The residual map was divided into twenty-five sections. Spectral
Depth was run for each of these twenty-five sections, the result shows that the
depth to the deep magnetic source ranges between -0.65 km and -3.35 km. The depth to the shallow magnetic sources
ranges between -0.03 km and -0.44 km showing the presence of magnetic intrusive bodies within the
sediments. Since the sedimentary thickness of 3.0 km and above is only
sufficient for hydrocarbon maturation and accumulation, then the results from
this present study show that the study area might be sufficient enough for
hydrocarbon maturation and accumulation.