George, Banjamin Tanyi2023-12-142023-12-142019-04-16BEING A THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES, NASARAWA STATE UNIVERSITY KEFFI, IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE AWARD OF DEGREE IN MASTERS DEGREE IN GEOCHESTRY.https://keffi.nsuk.edu.ng/handle/20.500.14448/5734DissertationAn Independent geological field mapping of the area around Anguwan Lanbu, part of Keffi Sheet 208NE, which covered an area extent of about 25Km2 was carried out on a scale of 1:12,500. The area lies within Latitudes: 8046'00"N and 8051'0"N, and longitudes 7052'00"E and 7057’00"E. The research was aimed at studying the geology and geochemistry of the area and hence, produces a geological map of the study area. Method of study involved field work to identify rock units as well as structural features, petrographical and geochemical analyses of the sample. The geological mapping carried out revealed three major lithological units namely: granite gneiss, granite and schist. Structural features observed included fault, joint, veins, foliation me fold. Rose plots of these features showed a dominant NE-SW trend. Based on the result obtained from petrographical analysis, the granite has mineral assemblage of quartz, biotite, and microcline, while the granite gneiss has a mineral assemblage of quartz, biotite, and plagioclase. Petro-chemistry of the rock units shows similar geochemical characteristics, the rock are characterized by a wide range in SiO2. The rocks display slightly linear major element trend and progressive rise in SiO2, A12O3 and K2O ratios. Based on field, petrographic and pretrochemical features, the granite gneiss ’ and the granites of Anguwan Lanbu high, were lacerated in a collision related tectonic setting (Pan African Orogeny) and genetically related to a common source by fractional crystallization. Economic mineral resources within the study area included industrial minerals, and construction materials.enThesis