The recently completed McKeand River and Amittok Lake aeromagnetic surveys on southern Baffin Island, Nunavut pro-
vide a new high-resolution magnetic dataset over an area with no previous coverage. Complemented by regional gravity
data, newly acquired rock-property information and geological-mapping products, the aeromagnetic dataset yields qualita-
tive and quantitative information on the structure and geology of the underlying bedrock. This paper presents a preliminary
interpretation of these datasets that delineates three gravimetric and five magnetic domains. The gravity data outline a broad
negative anomaly associated with a plutonic-intrusive suite, as well as several isolated gravity highs associated with
metasedimentary strata. Magnetic domains are defined on the basis of anomaly amplitude, wavelength and texture, and are
correlated to the mapped geology and magnetic properties. Associations between potential-field anomalies, physical prop-
erties and mineral occurrences help define the regional distribution of economically significant horizons