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Ojelabi, E. A.
- Evaluation of Low-Field Hysteresis Loop and Magnetic Susceptibility of Tertiary Basalt from Jos Plateau: Nigeria
Abstract Views :164 |
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Authors
S. C. Garde
1,
E. A. Ojelabi
2
Affiliations
1 Department of Physics, University of Ibadan, Ibadan, NG
2 Department of Physics, Ogun State University, Ago-Iwoye, NG
1 Department of Physics, University of Ibadan, Ibadan, NG
2 Department of Physics, Ogun State University, Ago-Iwoye, NG
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 52, No 5 (1998), Pagination: 597-601Abstract
Low-field hysteresis (LFH) loop and relative magnetic susceptibility (RMS) values in a field of 0.5 to 10 Oe has been used to evaluate the stability of magnetic directions of Tertiary basalts from Jos Plateau Nigeria. Graphs of magnetic moments (MM), susceptibility (S) and relative magnetic susceptibility (RMS) against applied field (AF) were plotted. The results showed that in a field of 0.5 to 1.5 Oe, the MM varied linearly with the AF while for Af > 1.5 Oe MM remained approximately constant. Rocks having stable tilted lines without any Rayleigh loop have relative susceptibility values in the range of 0.2 to 0.245 and ≥0.3 at 10 Oe, an indication of their being paiaeomagnetically stable. Rocks having thin Rayleigh loops had corresponding RMS values in the range 0.15 to 0.19. On the other hand wide loops were found to correspond to RMS value in the range ≤0.145.Keywords
Geophysics, Palaeomagnetism, Tertiary Basalt, Low-Field Hysteresis, Nigeria.- Comparative Analysis of Wenner and Schlumberger Methods of Geoelectric Sounding in Subsurface Delineation and Groundwater Exploration - A Case Study
Abstract Views :216 |
PDF Views:2
Authors
Affiliations
1 Geophysics Research Group, Department of Physics, University of Lagos, Lagos, NG
2 Department of Physical Sciences, University of Agriculture, Abeokuta, Ogun State, NG
1 Geophysics Research Group, Department of Physics, University of Lagos, Lagos, NG
2 Department of Physical Sciences, University of Agriculture, Abeokuta, Ogun State, NG