Geochemistry of Rwenzori Thermal Spring Waters

Abstract

Rwenzori springs refer to thermal springs around R Ilzori Mountains; in western Uganda. A chemical and isotopic sampling programme was undertaken by the authors as part of the GEOTHERM programme, a technical cooperation project between the Government of Uganda and Germany. The programme was part of the field investigations, which included gravity survey, Transient Electromagnetic (TEM) survey and Schrumberger Sounding. Geophysical work was nlainly focused around Buranga hot springs, on the western side of Rwenzori. Later on a network of seismic stations were installed around Mt Rwenzori. Geochemical and isotopic sampling was regional in scope, to understand the relationship of the neighboring thermal manifestations to Buranga hot spring system. It involved sampling thermal water and tufa deposits, measuring of surface temperature, conductivity and pH. Thermal springs sampled included L. Kitagata, Muhokya, Kibenge, Bugoye, Rwimi, Rwaginlba, Nyansimbe, Kagoro, Mumbuga and Kibuku. This report is a result of integrated field and laboratory studies carried out on Rwenzori thermal springs.