Nafta, Vol. 62 No. 11-12, 2011.
Pregledni rad
Subsurface stratigraphic mapping using geoelectric method and its impact on development in Federal College of Education (technical) Gusau, Zamfara State, Nigeria
K. A. Murana
; Physics Unit, SLT Department, Abdu Gusau Polytechnic, Talata Mafara. Zamfara State.
P. Sule
; Physics Department, Ahmadu Bello University, Zaria.
A.L. Ahmed
; Physics Department, Ahmadu Bello University, Zaria
E. M. Abraham
; Physics Department, Ahmadu Bello University, Zaria
E.G. Oband
; Physics Department, Ahmadu Bello University, Zaria
Sažetak
A resistivity survey has been carried out in order to determine the subsurface stratigraphic mapping of Federal College of Education (Technical), Gusau, Zamfara State. Twenty - four Vertical Electrical Soundings (VES) have been conducted with maximum current electrode separations of 200 m. Schlumberger array has been used. WinGlink software has been used in interpreting the results. Two and three subsurface layers exist in the study area. The first layer has resistivity values ranging from 1 to 522 Wm and thickness 0.40 to 2.29 m, the topsoil is predominantly clay. The second geoelectric layer has resistivity values that varies from 5.0 to 4 000 Wm with thickness 0.37 to 17 m, lithology of the second layer varies from sandy clay to weathered/fractured sandstone while the third layer resistivity ranges from 50.0 to 9 900 Wm, the rock type in this layer vary from weathered/fractured basement to fresh basement. The topsoil thickness ranges from 0.40 to 4.0 m while the overburden thickness of the surveyed area ranges from 0.40 to 18.0 m. The results show that the area can support low to giant engineering structure.
Ključne riječi
stratigraphic mapping; lithological beds; geoelectric sections; resistivity sounding
Hrčak ID:
75951
URI
Datum izdavanja:
30.12.2011.
Posjeta: 2.685 *