Frog's Leg Operations
- Ownership:
- 49% Alacer Gold, 51% La Mancha Resources
- Location:
- 20 km west of Kalgoorlie, Australia
- Mining:
- Underground
- Processing:
- Gravity, CIP (processed at SKO)
- 2011 Gold Production:
- 57,570 ounces
- Proven & Probable Reserves:
- 2.1Mt at 5.8g/t gold for 385,000 ounces
- Measured & Indicated Resources:
-
2.2Mt at 6.7g/t gold for 480,000 ounces
(as at December 2011, Alacer's 49% share)
Alacer Gold owns a 49% interest in the Mungari East Joint Venture, which owns the Frog’s Leg Mine, located 20 kilometres west of Kalgoorlie, Western Australia. The remaining 51% is held by La Mancha Resources who is the operator of the mine.
Open-pit production at Frog’s Leg began in April 2004 and the first gold was poured in July 2004. In December 2007, the underground feasibility study was completed with first gold poured from underground ore achieved in May 2008.
Frog’s Leg is located approximately 20 km west of Kalgoorlie, Australia and is a structurally controlled orogenic gold deposit occurring in the Archaean Norseman-Wiluna Greenstone belt, part of the Yilgarn Craton. The deposit is located within a set of parallel NNW-trending faults associated with the Zuleika Shear Zone, a major regional fault, and along its convergence with the Mungari Shear Zone. Gold mineralisation predominately occurs along the faulted contact between the volcaniclastics and catrock basalts, ranging between ten to thirty metres in width and is sub-vertical to steeply west dipping.
The primary mining method at Frog’s Leg is underground mechanized longhole open stoping. Stopes are backfilled with paste to ensure maximum recovery of the ore without the need for pillars.
Alacer’s share of ore from the Frog’s Leg Mine is trucked to the Company’s South Kalgoorlie Operations where it is processed through the Jubilee processing plant, a standard crush, grind, leach and CIP circuit.
Alacer’s share of gold production from the Frog’s Leg mine totalled 57,570 ounces during calendar 2011.
