This work produces some vital geologic information on the geology and structural analysis of rocks mapped around Kanwara, Dass local government area of Bauchi State. The mapped area is located between longitude N10001’09” and N1O000’09”and latitude E9032’42” and E9031’26”. Exposure of rocks in the area were mostly high level and medium level outcrops with only a few low level outcrops, the high level outcrops were conically shaped with height ranging between 400m to 700m above sea level while the inselberg was about 900m. The predominant rock types in the area were granite gneiss, biotite granite and migmatite, under thin section, minerals were identified via their respective optical properties under both plane polarized light and cross polarized light, the major minerals associated with the rocks were; biotite, quartz, feldspars, (orthoclase & plagioclase), muscovite and microcline. Based on field observations, the geologic structures found on the rocks include; joints, foliations, minor folds, ghost schist, dykes and veins. The joints indicate the masking effect of the pan African orogeny on the older granites (trending NW-SE). The shape of the girdle from the structural analysis conducted indicates that the rocks of the mapped area were subjected to medium grade metamorphism.
TABLE OF CONTENT
Declaration
Dedication
Acknowledgement
Abstract
List of Figure
List of Tables
List of Plates
CHAPTER ONE: INTRODUCTION
1.1 Aims and objectives
1.2 Location and Accessibility
1.3 Relief and Drainage
1.4 Climate and Vegetation
1.5 Settlement and Land Use
CHAPTER TWO: Review of the Geology of the Precambrian to lower Paleozoic rocks of northern Nigeria
2.1 The palaeozoic and precambrian rocks in northern Nigeria
2.1.1 The Basement Complex (Senso Stricto);
2.1.2. Younger Metasediments;
2.1.3. The Older Granite Series;
2.1.4. Younger Volcanic Rocks;
2.2 Intermediate rocks from older granite complex of the Bauchi area, northern Nigeria
2.3 Field relations at Dass
CHAPTER THREE: MATERIALS AND METHODS
3.1 Field Methods
3.1.1 Field Equipments
3.1.2 Sample Collection
3.1.3 Measurements of strikes and dips.
3.2 laboratory methods
3.2.1 Microscopic Study of Rock Samples
3.2.2 Procedure for generating data for statistical analysis
3.3 Procedures for structural analysis using stereographic projections
3.3.1 The materials needed are;
3.3.2 General Procedures for plotting of foliation planes
3.3.3 Procedures for plotting poles
3.3.4. Procedure for using counting Net
3.3.5 Procedure for contouring the points
CHAPTER FOUR: MACROSCOPIC AND MICROSCOPIC STUDIES
4.1 Macroscopic study of sample A
4.1.1 Microscopic study of sample A (plate I)
4.1.2 Statistics of sample “A” (plate I)
4.2.1. Macroscopic study of sample B
4.2.2 Microscopic study of sample B (plate II)
4.2.3 Statistics of sample B (plate II)
4.3. Macroscopic study of sample C
4.3.1 Microscopic study of sample C. (plate III)
4.3.2 Statistics of sample “C” plate III
4.4 Macroscopic study of sample D
4.4.1 Microscopic study of sample D (palte IV)
4.4.2 Statistics of sample “D”
4.5 Macroscopic study of sample E
4.5.1 Microscopic study of sample E. (plate IV)
4.5.2 Statistics of sample “E”
4.6 Structural Geology
4.6.1 Joints
4.6.2 Lineation (Foliation)
4.6.3 Minor Folds
4.6.4 Dykes (Pegmatite/Aplite) and vein (Quartz)
4.7 Structural analysis
4.7.1 Point or pole Diagram
CHAPTER FIVE: RESULTS AND SUMMARY
5.1 Petrography
5.1.2 Interpretation of diagrams (structural analysis)
Conclusion
Geological Map of the study area
Recommendations
References
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