Enterprise Metals Doolgunna Project covers part of the southern boundary of the Bryah Basin and the northern part of the Yerrida Basin.
The landholdings contain the basal (shallow) parts of the Proterozoic Yerrida Basin, which consists of the Johnson Cairn and Juderina Formations. These formations overlie Archaean granitic basement (the Goodin Dome) along the southeast margin of Enterprise’s landholdings. These two formations are separated from the Bryah Basin and Narracoota Volcanics sequence to the north by the Goodin Fault, a major deep seated structure.
A number of gold prospects and base metal occurrences have been identified associated with the Juderina Formation in GSWA databases. Exploration has also located SEDEX style base metal mineralization in the Johnson Cairn-Juderina and Doolgunna Formations. (Refer Enterprises’ ASX releases 8 July 2014, 30 April 2015, 6 October 2015 and 24 December 2015).
Enterprise identified anomalous levels of base metals and pathfinder elements associated with sulphides hosted in carbonaceous shales interpreted to be Johnson Cairn Formation. Long intervals of sediment hosted, laminated and massive / semi massive largely pyritic sulphides were intersected in Enterprise’s drilling. The abundance of pyrite mineralisation in the carbonaceous shales of the Johnson Cairn Formation was regarded as an important indicator of the prospectivity of the Johnson Cairn Formation.
Geological Plan Showing the Location of Enterprise Owned and Controlled Tenements