The Curnamona Province in eastern South Australia is host to significant mineral and energy resources, including U, Cu-Au and geothermal. The Province is largely buried beneath recent sediments, with outcrop restricted to the Olary and Broken Hill Domains in the south, and the Mount Painter region in the north. In order to understand the subsurface geology in the Curnamona Province, several deep crustal seismic reflection surveys have been undertaken. Most recently, the 08GA-C1 seismic line was acquired as part of Geoscience Australia's Onshore Energy Security Program. This line extends from the previously acquired 03GA-CU1 line in the south, and runs north to the Mount Painter area through the Benagerie Ridge.
The prevalence of recent sediments in the area covered by the seismic line renders it difficult to constrain the geology imaged by the seismic data. To assist in meaningful interpretation of the data, several drill holes in the vicinity of the seismic line have been investigated. These are distributed from the north of the line to outcrop in the south, and intersect sedimentary and igneous rocks. Geochemical, geochronological and petrographic analysis has been performed on the samples taken. The results of these are documented in this report.