A new national airborne geophysical coverage (aeromagnectic and gamma-ray
spectrometry) of Malawi was completed in 2014. A contract to interpret the
results was awarded to the Geological Survey of Finland (GTK) working in
cooperation with BRGM (France) and brought to completion early in 2018. Some of
the highlights of this work were presented at a two-day meeting held in Zomba,
Malawi, January 18-19 this year. A much larger project, GEMMAP, led by BRGM, is
now underway to improve the geological mapping and mineral potential mapping of
the country. The first year results of GEMMAP formed the main focus of the
The supervision of the GTK Malawi geophysical interpretation was undertaken by
Colin Reeves for the World Bank. With the completion of the project, Colin has
withdrawn from work of this type with a track-record of similar projects going
back to the CIDA airborne reconnaissance of Botswana in 1975. Two big issues
stand out as still needing attention. First, the results of many such
public-sponsored surveys are still not easily accessible to potential users
worldwide, despite the advent of the internet (not to mention GIS) in this same
period. Second, the value of the results to understanding the main features of
Africa's geological architecture at a scale that crosses many countries still
has to be realised. Colin plans to spend time on this issue in his retirement.
In the first instance, this will be in the context of IGCP-628, the new
geological map of Gondwana.
The picture below shows a view of the East Africa Rift from the hills above
Zomba, Malawi. Lake Chilwa may be seen in the distance. The photo was taken on
Colin's January visit.
2018 June 20