von Mali, 
-berg- 
Bericht 
4.1974 
nnover), 
ue de la 
ngen. 
‘suchung 
ner 
na in 
. 
tenkundli- 
ischen 
6. 4 - 
tale) 
Abstract: 
In connection with the compilation of a geological map of Upper Volta 
on the basis of satellite imagery, river systems have turned out to 
be a valuable tool for the differentiation and identification of individual 
rock series, since several of the different crystalline units show a 
typical river system pattern. Among other things, the different grey 
shades, the differences in colours, and the morphological features 
served as further criteria for the differentiation of these geological 
units. Although mapping was strongly handicapped by the fact that 
wide parts in the south of the country are covered with laterite and 
extensive areas in the north are being covered with sand at an 
increasing rate, inspection in the field confirmed the draft map to 
a large extent. It was also possible to correlate in the field circular 
structures identified on the satellite photo with flat crystalline domes 
which the rivers flow around in wide arcs. 
In two special cases - "Gan" (Pb mineralizations in veins) and "Kalamama" 
(finely distributed Cr, Ni mineralization) - mineralized areas which 
had already been known were investigated in more detail. In the 
vicinity of Gan, linear relief elements proved to be the most informative 
features, whereas in the Kalamama area the strike of mineralized rock 
units follows typical river system structures.