| dc.description.abstract | The geological mapping of Igayaza village was from 30th January, 2022- 08th February, 2022 where we travelled to Isingiro district in western Uganda. This report comprises of a detailed compilation of aims, methods, findings, interpretations, conclusions and recommendations for the Igayaza-Isingiro geological mapping exercise and field excursion. The project is aimed at giving
the students hands on training in geological mapping techniques, data collection and analysis, presentation of the geological data and report writing.
The study area is Gayaza in Isingiro district in Western Uganda which is part of the karagwe-Ankolean system of rocks which is the name given to the rocks of the Kibaran belt in Uganda. It was divided into smaller areas with each area assigned to a group of around 8-9 students. In this report, Area I which is underlain by rocks of Paleoproterozoic age that include granites, quartzites, shales, conglomerates and phyllites is fully discussed. Overall, the Isingiro region and surrounding areas belong to Paleoproterozoic geology of Uganda under Rwenzori fold belt and this is where we find karagwe-Ankolean system of rocks in Uganda. The mapped area (Area I) lies between UTM coordinates of Eastings (250000-252000) and Northings 9915000-9917000) in Nyakigyera sub county, Isingiro district. It borders Igaharo to the East and Kabingo to the
South, and covers a total land area of four-square kilometers.
The area was traversed while making observations of rock units, mineralogy and structures at the same time taking measurements on attitudes of the different geological structures. Samples were also taken and thin sections created. The thin sections were analyzed in the laboratory under petrographic microscopes and indicated that common minerals in the rocks are quartz, clay minerals and iron oxides. Measurements taken were analyzed using stereonet software to interpret
the orientation of the different geological features.
While in the field, a base map of area I was produced and digitized using Arc GIS software to produce the geological map of the area. The field observations identified shales, a small sandstone and quartzites as the rock units in area I. The rocks also contain quartz and iron oxide veins. The major minerals include quartz, clay minerals, feldspars, micas. The structures are both primary
and secondary and include beddings, laminations, joints, veins, casts, and faults. The folds are both regional and cross folds. The joints and the bedding planes are oriented in NE-SW direction. Metamorphism is largely regional metamorphism and generally of low grade. Contact metamorphism occurs in rocks adjacent to granitic intrusion. | en_US |
