Earea Dam Historic Gold Mine and Moolkra Gold Prospect
Earea Dam Historic Gold Mine (ML5856) and Moolkra Gold Prospect (ELA 2017/00024)
Earea Dam is the Company’s fully granted Mining Lease and is located adjacent to the Tarcoola-Glendambo road and the Perth-Adelaide train line about 30 kilometres west of Kingoonya (Figure 2 on the Projects page). It was a high grade historic mine (c1899-1940’s) producing approximately 2,000 ounces at an average grade of approximately 35 grams per tonne gold from 1,870 tonnes of ore.
Gold was discovered in outcrop along a NE-SW oriented outcropping shear within Archean-age Kenalla gneiss which is locally intruded by Kimban-age (Proterozoic) mafic dykes and rhyolite/rhyodacite dykes associated with the Gawler Range Volcanics.
Modern exploration including drilling has been completed by both Tarcoola Gold (1988-89) and Minotaur (2006), together with prospecting/small scale mining activities by various lease holders over the past 20+ years.
A review of the historical mining, geological survey mapping and exploration drilling has been undertaken and summarised as follows:
The most significant gold mineralisation is controlled by a narrow shear (0.1 – 1m wide) that strikes 005° - 065° and dips between 15-40° E - ESE.
Documented relationships between some crosscutting mafic dykes indicates a possible sinistral sense of movement along the main shear, which provides a logical explanation for why mineralisation should be observed at the former Wilgena/Enterprise workings along the main shear. At this locality the strike of the shear approaches N-S. The same relationship may exist at the Perseverance workings further to the NE, but there is insufficient surface outcrop of the main shear to confirm this.
The best grades are typically in the order of ~1m @ 5-10 grams per tonne gold, with the best grade being 1m @36 grams per tonne gold.
Fault offsets were interpreted by Minotaur to explain observed displacements of the main shear between drill holes.
In the late 1990’s, MIM identified primary gold mineralization a few kilometers to the West of Earea Dam in shallow drilling (Moolkra Prospect) through the follow-up of elevated gold in calcrete. The drilling intersecting coherent gold mineralisation, with the best intersection being 52m@ 0.41g/t Au from drill hole MLK183, including separate higher grade intervals of 8m @ 0.92g/t Au and 4m @ 1.35g/t Au. This gold anomalism is interpreted as having a strike length of at least 400m (NW orientation) remains open in all directions, including vertically, Figure 10.
The setting of this gold mineralisation is similar to that at the Minos prospect and a number of other targets have been identified within the application area in addition to Moolkra.
Figure 10 - Earea Dam Mine and Moolkra Prospect