A small area located approximately 20 km north-northwest of Orroroo was taken up to explore for possible diamondiferous kimberlite intrusions. Three known kimberlite dykes, one of which is diamondiferous, trend in a north-westerly direction through part of the licence area, and regionally form part of a more extensive kimberlite and lamprophyre dyke swarm that was discovered during the mid 1970s. The Eurelia district is the only locality in South Australia where authenticated diamond-bearing primary igneous source rocks have been found, although to date they appear uneconomic. At present 13 Jurassic micaceous kimberlite bodies are known, of which Stockdale Prospecting's K3, K5 and K6 lie within EL 1871. It was thought by the current licensees that previous explorers had identified only those intrusions that are masked by thin superficial cover and are still shedding kimberlitic indicator minerals into modern drainage systems. Any remaining undiscovered intrusions are likely to be buried under the alluvium-covered plains north of Eurelia and in the south-eastern sector of the licence area, but no discrete magnetic targets are evident in these places. In the first licence year the joint venture carried out mainly office studies, reviewing the available aeromagnetic data and previous explorers' reports, and then performing a brief field reconnaissance to try to identify any obvious significant geological features. Three discrete small untested magnetic anomalies in the Pekina Creek valley, and some curvilinear magnetic lineaments in the Oladdie Hills, were regarded as potentially prospective targets. In the second licence year, a photogeological study was commissioned to point out the subtle geomorphological expressions of deep-seated structures, such as extensional wrench faults, that could be controlling the emplacement of kimberlites, besides identifying places having surface signs of unusually deep weathering or rock alteration haloes, and this study was followed by the conduct of an initial pass of gravel plus loam heavy mineral sampling and soil geochemical sampling that targeted a few such sites, and also some small magnetic low anomalies. Although a limited number of positive diamond indicator minerals (chromite and picroilmenite, but no diamonds) were recovered from one of eight gravel samples and one of twelve soil samples, both occurrences were thought to derive from the nearby K6 kimberlite dyke. Because only the one grain of picroilmenite was discovered lying over a low magnetic anomaly, in a loam sample taken from on top of a low hill, it was concluded that this indicator is likely to be a residue of the re-weathering of an earlier transported sedimentary depositional surface. No further work was undertaken on the EL during licence years 3 and 4, before a decision was made to allow tenure to lapse.