BRIEF REGIONAL GEOLOGY OF THE AREA

The geology of Nigeria is made up of three major petro-lithostratigraphical components;
1. Basement Complex: Pan-African and older (Precambrian) > +600 million years
2. Younger Granites: Jurassic 200 – 145 million years
3. Sedimentary Basins: Cretaceous to Recent < 145 million years.
The license area is largely underlain by two out of three major geological component that made up the geology of Nigeria which are the Basement Complex and the Sedimentary Basins as listed above. The map above illustrated that the license area has the Bida Basin at the North- Eastern flank of the property while the Basement Complex occupies the South- Western part of the license, according to the NGSA map.The Sedimentary part of the license is made up Nupe Sandstone and it has a sharp contact with the Basement Complex within the license area. Bida Basin or the Nupe Basin is a NW–SE trending intracratonic sedimentary basin extending from Kontagora in Niger State of Nigeria to areas slightly beyond Lokoja in the south. The Basement in this area is made up of the Migmatite gneiss complex and the Schist Belt.

The Migmatite gneiss complex has a heterogeneous assemblage comprising migmatites, orthogneises, paragneisses, and a series of basic and ultrabasic metamorphosed rocks. Petrographic evidence indicates that the Pan-African reworking led to recrystallization of many of the constituent minerals of the Migmatite – Gneiss Complex by partial melting with majority of the rock types displaying medium to upper amphibolite facies metamorphism. The Migmatite – Gneiss Complex has ages ranging from Pan-African to Eburnean.

The Schist Belt in this area is one of the twelve Schist belts in Nigeria according to Woakes et al., 1987. This falls under Ilesha/ Isanlu schist belt unit consists of amphibolite, amphibole schists and pelitic schists with much intimately associated trondhjemitic granite, gneiss and pegmatite.

The map in figure 2 above, shows the simplified geology of the area under study showing the predominant rock units within the License area. The local geology shows five major rock types in the license area which can be broadly categorized into two ie Sedimentary Basin and Basement Complex. The five units are the Sandstone, the Migmatite gneiss, the Schist, the Amphibolite and the Pegmatite.

The sandstone unit is the sedimentary component of the geology which is part of the Nupe Sandstone. Generally, they are form hills of a tabular structure and ferruginous in nature. And this forms a sharp boundary with the Basement complex which is made up of the Migmatite gneiss, Schist, Amphibolite and the pegmatite. Within the schist and the gneisses are quartz veins and veinlets.

STRUCTURAL GEOLOGY

Structural the area is defined by several structural deformation and recrystallization of rocks, thereby resulting into diverse structural signatures. The area is characterized predominantly by NE-SW and NW-SE trending structures and few EW trending structures as in the map below.

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