A small area of the northern Flinders Ranges surrounding the Nichols Nob copper occurrences was explored for possible economic massive stratiform copper deposits, targeting the known mineralised Yudnamutana Subgroup metasediments. Work comprised a photogeological study, prospecting and geochemical surveys (soil plus traverse channel sampling of bedrock exposures - 280 and 1100 samples assayed respectively), some ground magnetometry, and exploratory percussion drilling undertaken during February 1971 (6 inclined holes for a total penetration of 2330 feet). No significant mineralisation was encountered, and the scattered copper anomalism of between 200 and 900 ppm Cu recorded at surface was attributed to dispersions from isolated small detrital or hydrothermal quartz vein enrichments emplaced over a limited stratigraphic interval, that are probably related to local diapirism and buried older rocks. Petrographic examination of samples from the drilled target units determined that they are peri-glacial fluvial facies sediments of a type considered by AAP as unsuitable to host major stratiform copper accumulations.