Estimation of Magnetic Contact Location and Depth of Magnetic Sources in a Sedimentary Formation-Reference-Cited by-同舟云学术

Estimation of Magnetic Contact Location and Depth of Magnetic Sources in a Sedimentary Formation

Published:2019-03-01 Issue:1 Volume:66 Page:27-37
ISSN:1854-7400
Container-title:Materials and Geoenvironment
language:en
Short-container-title:

Author:

Alabi A.A¹,Makinde V¹,Adewale A.O²,Coker J.O³,Aluko T.J¹

Affiliation:

1. Department of Physics, College of Physical Sciences , Federal University of Agriculture , Abeokuta , Nigeria

2. Department of Science Laboratory Technology , Moshood Abiola Polytechnic , Abeokuta , Nigeria

3. Department of Physics, Faculty of Science , Olabisi Onabanjo Univesity , Ago Iwoye , Nigeria

Abstract

Abstract The aeromagnetic data of Idogo, Southwestern Nigeria, have been used to study the lithology and to determine the magnetic source parameters within Idogo and its environs. Idogo lies between latitudes 6°30′N and 7°00′N and between longitudes 2°30′E and 3°00′E. The magnetic anomaly map, the regional geology, the analytic signal and the local wavenumber were used to identify the nature and depth of the magnetic sources in the region. Data enhancement was carried out to delineate the residual features relative to the strong regional gradients and intense anomalies due to the basin features. The estimated basement depth using the horizontal gradient method revealed depths ranging between 0.55 km and 2.49 km, while the analytic signal amplitude and local wavenumber methods estimated depth to the magnetic sources to range from 0.57 km to 4.22 km and 0.96 km to 2.43 km, respectively. Depth computations suggested the presence of both shallow and deep sources. The total magnetic intensity values ranged from 3.1 nT to 108.3 nT. The area shows magnetic closures of various sizes in different parts of the area trending West, with prominence at the centre and distributed East–West.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics

Link

https://www.sciendo.com/pdf/10.2478/rmzmag-2019-0007

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