A Report on geologic field mapping project of Semliki Basin, Ntoroko District, the Albertine Graben.
MetadataShow full item record
The report contains different field work and excursion activities held within the Albertine graben, South and East of Lake Albert. The area of study was Semliki basin located in the southern part of the Albertine graben, Ntoroko district western Uganda. Semliki area lies onshore south of Lake Albert, it is bounded by the escarpment to the east and south and by rivers Lamia and Semliki to the west. It covers approximately 1200km². Target areas were Kichwamba, Kibuku area, the Turaco structure and the topics of interest being the East African Rift System (EARS). The field work lasted a period of two weeks, commencing 21st July, 2019 through 4th August, 2019. The main objective of this field study was to obtain training on how to collect, analyse and interprete data such as stratigraphic, petrographic, sedimentologic and structural data which are of high important in hydrocarbon exploration. The project involved collection of vast structural and stratigraphic data that then analyzing the data to make conclusions about the petroleum potential of Semliki basin with the help of relevant available literatures from previous scholars and researchers that have extensively studied the Semliki basin. Findings, interpretation and conclusion Sedimentology, stratigraphy and tectonics were applied to develop a full understanding of the rocks and the sediments that fill Semliki basin. This information was used to interpret the geologic history and evaluate the economic importance of these rocks. The data collected and observations made indicated that the basin was affected by intensive tectonic activity, that led to the formation of various types of structures within the basement that propagated to the sediments such as faults, joints, folds, veins and banding. Sedimentary structures observed included cross bedding, unconformities, faults, a mud diapir and deformation bands. Mud diapirs, faults, plunging folds would be good structural seals. The presence of hot springs with in the area indicated the presence of high enough geothermal gradients for maturation of hydrocarbons. We concluded that the study area had a good petroleum system characterized with all the required system elements that is source rocks (organic rich shales), reservoir rocks (thick sandstones), seals (shales and evaporites), traps (faults, diapirs) and migration pathways (cross beds, faults, and beds). This report is submitted to the School of Physical Sciences Department of Geology and Petroleum Studies in partial fulfillment of the requirements for the award of Bachelor of Science degree in Petroleum Geoscience and Production at Makerere University