The Anapu-Tuerê region, in the Brazilian Amazon, is known for the occurrence of mineral deposits associated with
mafic-ultramafic rocks. The spatial distribution of these rocks was investigated by integrating airborne magnetic and
gamma ray spectrometry data using Geographic Information System (GIS) and fuzzy logic classification. Highest values
of relevance fuzzy were associated with mafic-ultramafic rocks mapped regionally by the Brazilian Geological Survey
(CPRM). Furthermore, mineral occurrences mapped by the CPRM showed good spatial correlation with the higher
values of relevance fuzzy presented in this paper.