Geochemistry of Rwenzori Hot Spring Waters

Abstract

Rwenzori springs refer to hot and cold mineralized springs around Rwenzori Mountains. A chemical sampling campaign was undertaken as part of the GEOTHERM programme, a technical cooperation project between the Government of Uganda and Germany. The geochemical sampling programme was part of the field investigations, which included gravity survey, Transient Electromagnetic (TEM) survey and Schrumberger Sounding. Geological mapping was supplemented by Aster image interpretation.

Geophysical work was focused around Buranga hot springs, on the western side of Rwenzori. However, geochemical sampling was regional in scope, to understand the relationship of the neighboring thermal manifestations to Buranga hot spring system. Work was carried out between 21st February to 5th March 2005. It involved sampling hot spring water and hydrothermal deposits, measuring of surface temperature, conductivity and pH. The samples were to be analyzed for trace and major elements. Geothermal sites sampled included Lake Kitagata, Muhokya, Kibenge, Bugoye, Rwimi, Rwagimba, Nyansimbe, Kagoro, Mumbuga and Kibuku. This report is an integrated field and laboratory studies carried out on Rwenzori hot springs.