Integrating Aeromagnetic and LandsatTM 8 Data for Geologic Features of Igbeti Schist Belt, Southwestern Nigeria: Implication for Groundwater Exploration

2019 ◽  
pp. 225-228
Author(s):  
Nurudeen Olasunkanmi ◽  
Lukman Sunmonu ◽  
Moruffdeen Adabanija ◽  
Jimoh Ajadi ◽  
Leke Sunday
Keyword(s):  
Groundwater Exploration ◽  
Schist Belt ◽  
Southwestern Nigeria

scholarly journals Geochemical Characteristics and Tectonic Setting of Amphibolites in Ifewara Area, Ife-Ilesha Schist Belt, Southwestern Nigeria

2016 ◽  
Vol 6 (1) ◽  
pp. 43 ◽  
Author(s):  
Anthony Temidayo Bolarinwa ◽  
Adebimpe Atinuke Adepoju
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Major Element ◽  
Tectonic Setting ◽  
Crustal Contamination ◽  
Geochemical Evolution ◽  
Schist Belt ◽  
Southwestern Nigeria ◽  
Eu Anomaly ◽  
Ree Patterns

Trace and Rare Earth Elements (REEs) data are used to constrain the geochemical evolution of the amphibolites from Ifewara in the Ife-Ilesha schist belt of southwestern Nigeria. The amphibolites can be grouped into banded and sheared amphibolites. Major element data show SiO2 (48.34%), Fe2O3 (11.03-17.88%), MgO (5.76-9.90%), CaO (7.76-18.6%) and TiO2 (0.44-1.77%) contents which are similar to amphibolites in other schist belts in Nigeria. The Al2O3 (2.85-15.55%) content is varied, with the higher values suggesting alkali basalt protolith. Trace and rare earth elements composition reveal Sr (160-1077ppm), Rb (0.5-22.9ppm), Ni (4.7-10.2ppm), Co (12.2-50.9 ppm) and Cr (2-7ppm). Chondrite-normalized REE patterns show that the banded amphibolites have HREE depletion and both negative and positive Eu anomalies while the sheared variety showed slight LREE enrichment with no apparent Eu anomaly. The study amphibolites plot in the Mid Oceanic Ridge Basalts (MORB) and within plate basalt fields on the Zr/Y vs Zr discriminatory diagrams. They are further classified as volcanic arc basalt and E-type MORB on the Th- Hf/3- Ta and the Zr-Nb-Y diagrams. The amphibolites precursor is considered a tholeiitic suite that suffered crustal contamination, during emplacement in a rifted crust.

Aeromagnetic mapping of basement structures and mineralisation characterisation of Ilesa Schist Belt, Southwestern Nigeria

2018 ◽  
Vol 138 ◽  
pp. 383-391 ◽  
Author(s):  
A.A. Akinlalu ◽  
A.O. Adelusi ◽  
G.M. Olayanju ◽  
K.A.N. Adiat ◽  
G.O. Omosuyi ◽  
...  
Keyword(s):  
Schist Belt ◽  
Southwestern Nigeria ◽  
Basement Structures

Airborne and ground geophysical evaluation of potential mineralized zone in parts of Ilesha Schist-belt, Southwestern Nigeria.

2021 ◽  
pp. 1-45
Author(s):  
Oluwaseun S. Ogungbemi ◽  
John O. Amigun ◽  
Gbenga M. Olayanju ◽  
Ganiyu Badmus
Keyword(s):  
Data Sets ◽  
Schist Belt ◽  
Southwestern Nigeria ◽  
Near Surface ◽  
Elemental Ratios ◽  
Lateritic Clay ◽  
Mineral Deposition ◽  
Overburden Thickness ◽  
Mineralized Zone ◽  
Tilt Derivative

Integrated airborne and ground geophysical studies were conducted in parts of Ilesha schist belt, southwestern Nigeria. The goal was to provide a useful guide for mineral prospecting, with the hope of considerably narrowing down the future search for mineral deposits within the study area. Aeromagnetic and aeroradiometric data were analyzed for the reconnaissance study. In addition, the reduction-to-equator transform, analytic signal, tilt derivative, and Euler deconvolution filters were applied to the aeromagnetic data to enhance shallow and deep geologic features. The aeroradiometric data were used to determine spatial variations in the concentrations of uranium (U), thorium (Th), and potassium (K) in near-surface rocks and to map spatial lithologic changes. The 2D-magnetic sections, radiometric profiles, inverted resistivity, and induced polarization (IP) sections were generated from the integrated geophysical data. The electrical resistivity tomography (ERT) results reveal the subsurface heterogeneity (to a depth of approximately 197 m) and varied geoelectric layers (topsoil, lateritic-clay, weathered rock, and basement rock). The IP sections show varying degrees of chargeability and features that suggest the presence of disseminated mineralized bodies concealed in some areas. The overburden thickness varies between 4 and 85 m as determined from the 2D-magnetic and electric resistivity sections. Anomalous peaks on profiles of elemental ratios (eTh/K, eTh/eU, and K/eU) correlate with the results of IP and ERT. Data sets are well correlated and highlight areas with relevant structural and lithologic signatures favorable for mineral deposition. The methodology adopted in our research is well adapted, and the interpretation techniques provided insight into regional and local lithostructural settings. These anomalous areas are suggested as targets for future exploration works.

Strain Conditions Indicated by Metamorphic Spots in the Igarra Schist Belt, Southwestern Nigeria

2016 ◽  
Vol 6 (3) ◽  
pp. 1-9
Author(s):  
Efosa Udinmwen ◽  
M Oden ◽  
E Ukwang ◽  
E Ibegbulam
Keyword(s):  
Schist Belt ◽  
Southwestern Nigeria
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