Data integration for interpretive bedrock mapping in the Giyani area (South Africa)

The Giyani greenstone belt is situated in the Limpopo province of South Africa. All previous maps, field observations and available geo-data sets were integrated using image fusion to recognise lithological variations: Mafic and granitic rocks showed strong contrast in DEM. Single images of airborne radiometric data as well as composite maps of U showed very good correlations with lithology. Soil geochemistry data were interpolated, and principal components analysis was applied for major and trace elements, as well as ratio maps of geochemical data were used for interpretive bedrock mapping. All useful fused images were interpreted to compile a new bedrock map for follow-up fieldwork