Aero-magnetic Surveys for Geothermal Exploration in Malawi
Ruth MUMBA, Esther MABEDI, Yankho KALEBE
[Geological Survey Department, Malawi]
The geological setting of Malawi shows potential of geothermal resources. However, information of the country's potential geothermal resources is limited. Malawi is on the western branch of the East African Rift System and does not show any volcanism except at the northern tip where the rift is older. Here, the work reviews country wide aeromagnetic data, it's usage in geothermal exploration and how to estimate the curie point depth (CPD). CPD is an isotherm of about 580°C. Spectral analysis is applied to the aeromagnetic data to estimate CPD spatial distribution and findings used to explore for geothermal resources. The calculated curie point depth of Malawi Rift ranges from 17.8 to 27.5km.
|        Topic: Exploration||Paper Number: 11013|