Overview
Highlights
1982 - Gold discovered by Kennecott / Niugini Mining JV
1984 - Lienetz orebody discovered
1986 - Minifie discovery hole started
1992 - Ore reserve 14.6Moz ( 104Mt at 4.37g/t ) and feasibility study
3/95 - Special Mining Lease
4/95 - IBP
8/95 - Main Loan Agreement
8/95
- Initial Public offering of LGL
11/95 - Site clearance commenced
4/96
- Thiess – Roche commenced work on
site.
1/97 - Waste barges commenced operation
5/97 - First gold pour
8/97 - First autoclave commissioned
10/97 - Commercial production
7/98
- Technical and financial completion achieved
1/99 - First autoclave reline
1/99 - Start of Geothermal drilling
7/99 - Record day 3.2 Koz
9/99 - One millionth ounce poured
12/99 - Record month 73.0 Koz
12/99 - Merger with Niugni Mining
12/99 - Flotation Plant commissioned
4/00 - Owner Mining commenced
Mine Production:
Production capacity 46 Mtpa of material. Current mining rate 38Mtpa. Schedule: 2 x 12 h shifts, 7 days per week.
Open Pit:
Planned final open pit dimensions are about 2 km by about 1.4 km. Planned final depth: 185 m below sea level. Bench heights: 12 m and 6 m. Maximum final pit slope angle: 47o. Haul roads: 32 m wide, 10 % maximum gradient. Average haul ore to crusher (1-way): 1500 m. Average haul waste to dump (1-way): 1100 m.
Plant Production:
Current capacity 3.6Mtpa of ore treated, producing an average of 600,000 troy ounces of gold per year.
Processes:
Crushing, grinding, flotation, pressure oxidation, counter current
decantation washing, neutralisation, CIL processing, tailings disposal. Gold
recovery processes: acid washing, carbon stripping, electrowinning, smelting and
carbon regenerating.
Infrastructure
Electricity supply:
source, 11 diesel generators, 6.3 MW nominal each (fired on HFO), 5
diesel generators 0.85 MW nominal each (fired on diesel). Maximum demand,
54 MW. Electricity consumption, 365 GWh/y.
Water supply:
source of fresh water, Londolovit River and Lakunbut Creek; sea water
used at power plant. Water demand, 3517 m3/hour.
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