The Hera Mine is a polymetallic underground mining operation and associated 450ktpa processing plant, located approximately 100km south-east of Cobar, NSW.
Aurelia purchased Hera as an undeveloped gold-lead-zinc-silver deposit from CBH Resources in September 2009. Following an extensive exploration and feasibility effort, the Hera Definitive Feasibility Study (DFS) was delivered in September 2011. Development approval was received from the NSW Government in July 2012. Project construction commenced in January 2013 and commercial production at Hera was achieved in April 2015.
Hera produced 58,025 ounces of gold in FY19 at an all-in sustaining cost (AISC) of A$809 per ounce. This operating result included by-product base metals output of 6,599 tonnes of lead and 10,129 tonnes of zinc.
Drilling at Hera is currently focussed on both near-mine opportunities and aggressive drill-out of the new Federation regional discovery.
Hera is an underground mine utilising bench stoping with the stopes backfilled with waste rock fill.
The Hera orebody is accessed from a decline located in the hanging wall. The decline has a gradient of 1:7 and production levels are nominally 25m apart.
Mined ore is processed through a 480ktpa flotation plant to produce gold-silver doré and a bulk lead-zinc concentrate.
The Hera-Nymagee region remains a highly prospective, underexplored corridor in which Aurelia has a dominant landholding. We possess a strong pipeline of exploration targets within 15km of the Hera Mine.
Our current near-mine focus at Hera includes extensional and/or new deposit opportunities at Main South East Deeps and up-dip of North Pod. The primary regional focus is rapid drill-out of the recently discovered and large-scale mineralised system at Federation.