Table 5Topographical map of the study area parts of Kurra sheet 189SW modified after Fed. Surveys, Nigeria 1967.|@|~(^,^)~|@|Simplified map of the geology of Nigeria after Okunlola, (2005).|@|~(^,^)~|@|Geological Sketch map of central and south-west Nigeria showing the location of the Wamba pegmatite field (study area) and the distribution of Pan-African Older Granites and pegmatites (underlined). Geochronogical data sources are van Breemen et. al. (1977), Rahaman et. al. (1983), Matheis and Caen-Vachette (1983), Tubosun et. al. (1984).|@|~(^,^)~|@|(a) Hand specimen of the alkali granite in the study area (Latitude 9°06'05"N and Longitude 8°44'30"E), (b) Field photograph of albitised granite (Latitude 9°04'10"N and Longitude 8°47'43"E), (c) Field photograph of a granite gneiss outcrop (Latitude 9°03'23"N and Longitude 8°33'43"E), (d) Field photograph of foliation structure in the banded gneiss with quartz and quartzo-feldspathic veins (Latitude 9°05'05"N and Longitude 8°31'36"E), (e) Field Photograph migmatite gneiss with ptygmatitic folding, upper arrow pointing at melanosome and lower arrow showing leucosome (Latitude 9°00'28"N and Longitude 8°42'30"E), (f) Hand Specimen of amphibolite rock in the study area (Latitude 9°07'17"N and Longitude 8°41'50"E).|@|~(^,^)~|@|Photomicrograph of the studied rocks under Plane Polarized Light (PPL) (a) alkali granite, (b) albitised granite, (c) granite gneiss, (d) banded gneiss, (e) migmatite gneiss, (f) sheared amphibolite; Biotite (Bt), Perthite (Prth), Orthoclase (Or), Plagioclase (Pl), Quartz (Qtz), Augite (Aug), hornblende (Hbl), garnet (Grt), Sphene (Shen), and muscovite (Ms). Mag.0.25mmX10.|@|~(^,^)~|@|Field Photograph of (a) quartz-feldspar-pegmatite intrusion into migmatite gneiss (Latitude 9°00'20"N and Longitude 8°42'16"E), (b) a narrow zone of tourmalinisation around the contact between quartz-feldspar-pegmatite and the host rock. (Latitude 9°00'30"N and Longitude 8°44'27"E), (c) Quartzmuscovite- pegmatites boulders (d) Whitish quartz-muscovitepegmatites intrusion in granite gneiss (Latitude 9°02'45"N and Longitude 8°34'38"E), (e) Highly deformed quartz-muscovitepegmatites trending NE (9°02'16"N and Longitude 8°35'36"E). (f) Deformed nature of quartz-muscovite-pegmatites in uplifted region (9°02'48"N and Longitude 8°31'10"E).|@|~(^,^)~|@|Field Photograph of (a) Field photograph of joints in the granite gneiss of the study area (Latitude 9°02'09"N and Longitude 8°38'34"E), (b) Field photograph of dextral fault along a quartz veins in the banded gneiss (Latitude 9°05'35"N and Longitude 8°30'06"E).|@|~(^,^)~|@|(c) Field photograph of pegmatite veins that intruded the migmatite gneiss of the study area (Latitude 9°01'15"N and Longitude 8°41'30"E). (d) Field photograph of quartzo-feldspathic veins in the banded gneiss within the study area (Latitude 9°05'05"N and Longitude 8°31'12"E), (c) Rose diagram of pegmatite veins in the study area showing the NE-SW dominant trend, (d) quartzo-feldspathic veins showing the NE-SW dominant trend in the banded gneiss of the study area.|@|~(^,^)~|@|(a) Structural lineament map of the study area, (b) Rose diagram of structural lineament trends of the study area.|@|~(^,^)~|@|Harker plot of Al₂O₂, CaO, K₂O and Na₂O against silica (SiO₂) for the granite suites in the study area. S2 and S6 (Alkali Granite), S4 and S12 (Albitized Granite), S2 and S6 (Alkali Granite), S4 and S12 (Albitized Granite).|@|~(^,^)~|@|(a) A/CNK – A/NK plot for the granitoids in the study area after Shand (1943), (b) Fe (total)/(Fe (total)+MgO) versus SiO₂ after Frost et al 2001.|@|~(^,^)~|@|(a) Na₂O + K₂O-CaO versus SiO₂ after Frost et al 2001, (b) Na₂O+K₂O vs. SiO₂ for the granitoids diagram of Middlemost, (1985). S2 and S6 (Alkali Granite), S4 and S12 (Albitized Granite), S1, S5 and S8 (Quartz-Feldspar-Pegmatite).|@|~(^,^)~|@|(a) Ternary normative Ab-Or-An diagram after O’Connor, 1965, (b) Fig. 16: A/CNK vs SiO₂ plot of rocks from the study area after (Chappel and White, 1974).|@|~(^,^)~|@|Spider diagrams for all the rocks samples normalized to average crust after McDonough and Sun (1995).|@|~(^,^)~|@|Chondrite normalized plot (After Nakamura, 1974) rare elements (REE) pattern for the (a) metamorphic rocks, (b) Pegmatites, (c) granites from the study area, (d) Plot of Rb-Ba-Sr after El Bouseily and El Sokkary (1975) for granitic rocks, (e) Modified Triangular Ti-Sn-(Nb+Ta) Plot for albitized granite and pegmatites in the study area (after Kuster, 1990), (f) Plot of Rb vs Na/K after Kaur et al., (2012) showing the progressive depletion of Rb with the advancing albitisation of K-feldspar.|@|~(^,^)~|@|(a) Plot of Ta Versus Cs tor The Muscovites of the pegmatites in the Kwarra area, (b) Plot of Ta Versus K/Cs For The Muscovites of Pegmatites in the study area. (After Beus 1968), Gordiyenko (1971), (c) Plot of Ta versus Ga for the pegmatites in the study area (After Černy and Burt, 1984), (d) Plot of K/Rb versus Cs for the pegmatites (after Černy and Burt, 1984), (e) Classification of the pegmatites using the plots of K/Rb versus Cs (after Trueman and Černy 1982), (f) Nb/Ta versus Zr/Hf diagram differentiating the barren granites and granites hosting ore deposits (after Ballouard et al., 2016).|@|~(^,^)~|@|(a) Rb vs. Y+Nb tectonic discrimination diagram after Pearce et al. (1984), (b) Plot of FeO_t / Mgo vs. Zr+Nb+Ce+Y for discriminating A-type granites after Whalen et al., (1987), (c) Triangular plot of Nb-Y-Ce for distinguishing the alkali granites into A1 and A2 granite (After Eby, 1992).

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