The Interpretation of Magnetic Data over the North-Southern Part of a Gold Mining Site in IBODI, ILESA, OSUN-State, Nigeria

A.B. Ekundayo¹ , A.O. Samuel²

Section:Research Paper, Product Type: Journal-Paper
Vol.9 , Issue.4 , pp.15-19, Aug-2021

Online published on Aug 31, 2021

Copyright © A.B. Ekundayo, A.O. Samuel . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

View this paper at   Google Scholar | DPI Digital Library

XML View     PDF Download

How to Cite this Paper

Abstract :
The geophysical method that was used for this field work is the ground magnetic survey technique. This method was used to give facts about the subsurface structure of the Earth, which focuses on the geological structure of the site based on the qualitative and quantitative interpretation of the ground magnetic data collected during the field work of this study. Two magnetic traverses were considered in this study. The magnetic anomalies along the two profiles show both minimum and maximum peaks indicating the presence of different rock types which include the Schist/Epidorite complex and Gneiss/migmatite undifferentiated. The profile of magnetic traverse 1 cut across the North-Southern part of the gold mining site and it is 350m long. Two rock types were observed along this traverse, these are: Schist/Epidorite complex and Gneiss/migmatite undifferentiated characterized by magnetic high and lows. The magnetic signature obtained for the magnetic anomaly along this traverse shows both maximum and minimum peaks. The Schist/Epidorite complex is observed to be at a station of about 10m from the base station, the Gneiss/Migmatite undifferentiated is at a distance between 10m to 306m, while the Schist/Epidiorite is observed at a distance of 310m to the final station on the geological section. The profile of magnetic traverse two cut across the West-Eastern part of the gold mining site and it is 270m long. Two rock types were observed, these are: Schist/Epidorite complex and Gneiss/Migmatite undifferentiated. The profile is characterized by magnetic high and lows. The Schist/Epidorite complex was observed to be at a station of about 10m and the Gneiss/Migmatite undifferentiated is observed at a distance between 11m to 270m.

Key-Words / Index Term :
Magnetic, Rock, Traverse, Anomaly, Delineate, Gold, Mineralization

References :
[1] Telford W.M, Geldart L.P, Sherif R.E, Keys D.A, “Applied Telford W.M, Geldart L.P, Sherif R.E, Keys D.A, “Applied Geophysics”, Cambridge University pg 60-69, 1976.
[2] William Lowie “Fundamental of Geophysics” Second Edition, Cambridge University press, pg 278-291, 2007.
[3] De Swardt AMJ “The Geology of the country around Ilesha Geology survey Nigeria Bulletin, No 28, 54, 1953”.
[4] Hubbard et al “The geological map of ife-ilesha area” Geological Survey of Nigeria, 1:250,000 series iwo sheet 60, 1966.
[5] Adetoyinbo A.A, Bello A.K and Hammed “The geology and geological characteristics of soil on ore deposits, Itagunmodi gold deposits a s a case study” Journal of Mining and Geology, p 55 – 70, 2008.
[6] Ariyibi E.A “Geophysical investigation for the delineation of potential mineralized zones in southern part of Ilesha Area, Nigeria” Unpublished PhD Thesis, the federal University of Technology, Akure, pg 205, 2008.
[7] Kayode J.S “Horizontal component of ground magnetic study of Ijebu-Ijesha Area, south-Western Nigeria” Global J our. Of Engg & Tech. Volume 2, Number 1 109-120, 2009.
[8] Woakes et al “Some metallogenetic features of Nigerian basement” Journal of African Earth Sciences, 6 (5), 655-664, 1987.
[9] Rahaman M.A “A review of the basement Geology of the south-western Nigeria” Geology of Nigeria, kogbe, C.A (Ed), Elizabeth published Lagos pg 41-58, 1976.
[10]Cooper G.R.J “Signproc for windows version .56”© 1994-2008.