A detailed examination of mineralised rock sequences within the metamorphosed Precambrian basement and Adelaidean cover rocks of the Weekeroo area, and recording of their relationship to successive deformational events and resulting rock structures, have given useful insights into stratigraphic and structural controls on base metal mineralisation which appear hitherto to have gone unrecognised. Present-day copper occurrences in the basement appear to be genetically related to calc-silicate and albitite units, and are concentrated where post - F2 shear zones cut across these units, often in association with the develpment of ironstone masses. It is considered likely that the albitites and ironstones were distinct units prior to the F2 deformation, but copper mineralisation which pre-existed within them was re-mobilised and concentrated by the deformational folding and brecciation. In work on the subject licence, Murumba Minerals carried out a review of disjointed evidence presented by former explorers in the region re. the relative degrees of stratigraphic and structural control on mineralisation; undertook geological mapping of the basement, particularly noting the location of fertile feldspar-rich horizons; prospected the setting of known base metal mineral occurrences, characterised with limited geochemical and petrographic sampling; and studied five areas in detail, to try to relate significant styles of mineralisation to a common structural scheme that has applicability elsewhere in the Olary Province.