Overview
Stage | Production |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Sub-level stoping
- Longhole open stoping
- Longitudinal open stoping
|
Production Start | ... |
Mine Life | 2033 |
The Tropicana Gold Project contains Havana and the now completed Boston Shaker open pits and the Boston Shaker and Tropicana underground operations.
Work associated with the Havana Underground Pre-Feasibility Study (PFS) progressed during the year 2023. The PFS is expected to be completed by the December quarter 2023 with the potential to start a main access decline in the second half of calendar year 2024. |
Latest News | Regis remains strong on production guidance March 19, 2024 |
Source:
p. 8,46
Tropicana is held in a Joint Venture agreement between Regis (30%) and AngloGold Ashanti Australia Limited (70%).
Tropicana is managed by joint venture partner AngloGold.
Contractors
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Summary:
The Tropicana Gold Project area lies east of a northeast trending magnetic feature, interpreted to be the major tectonic suture between the Yilgarn Craton and the Proterozoic Albany-Fraser Orogen that extends over 700km. The gold deposit is hosted in Archaean gneissic metamorphic rocks (ca. 2,640Ma) with cover sequences generally 10 to 30m thick resulting in the mineral deposit not being exposed at surface.
The 5km long strike of gold mineralisation at Tropicana is subdivided into five shear offset zones from north to south – Boston Shaker, Tropicana, Havana, Havana Deeps, and Havana South. The mineralised corridor is ~1.2km wide and up to 1.5km down dip to the current deepest drill intercepts. Within each zone the gold mineralisation trends north to northeast. Gold is concentrated in ~2m to ~50m thick subparallel layers within the ‘favourable horizon’ which comprises quartz-feldspar gneiss units.
Together, the Tropicana, Havana, Havana South and Boston Shaker deposits define a northeast trending mineralised corridor, approximately 1.2km wide and 5km long that has been tested to a vertical depth of more than 1,200m. The Mineral Resource remains open down-dip from the Tropicana, Havana and Boston Shaker deposits and has the potential to be extended to the north and south. Neither the immediate metamorphic host rocks nor the mineralised zones are exposed at surface due to the presence of widespread younger cover sequences.
The Tropicana area is ........
Mining Methods
- Truck & Shovel / Loader
- Sub-level stoping
- Longhole open stoping
- Longitudinal open stoping
Summary:
The Tropicana Mineral Reserve is extracted from both open pit and underground mines. Mining activities at both are undertaken by Macmahon, in an alliance partnership with AngloGold Ashanti.
Open pit mining began during 2012 with first gold production occurring during September 2013.
Underground mining commenced in 2019 at Boston Shaker. First stoping occurred in June 2020 and the mine achieved commercial production in September 2020. The underground mine is expected to be a significant contributor to the production profile going forward.
Tropicana underground commenced production in Q4 2022.
After the end of the September quarter 2023, the Tropicana Joint Venture approved commencement of the Havana underground feasibility study. Havana underground has a potential mine life of 7 years. The feasibility study will focus on operational readiness and detailed designs to commence development of the access decline and surface infrastructure in 2024. The target start date for the main access decline is the June quarter 2024.
Open Pit
The Open Pits at Tropicana are conventional load and haul operations. Loading is by combination of face shovels, and excavators, and haulage carried out with a fleet of rigid body haul trucks. Smaller class excavators are used for batter scaling operations and ancillary works. A fleet of loaders service the Run of Mine (ROM) stockpile requirements for ore feed to crusher, and to rehandle undergr ........
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Flow Sheet:
Summary:
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Pipelines and Water Supply
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Reserves at December 31, 2022:
Mineral Resources: Open pit block cut-offs are >0.3g/t Au for oxide and transitional, otherwise >0.4g/t Au for fresh using the regularised LUC mode. The CY22 underground MRE estimate was reported using Ordinary Kriged with a cut-off of >1.6g/t Au.
Mineral Reserves: Open pit ORE block cut-off >0.6g/t Au for oxide rock, otherwise >0.7g/t Au; Underground ORE block cut-off 2.5g/t Au.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | OreType | Tonnage | Commodity | Grade | Contained Metal |
Proven & Probable
|
Stockpiles
|
12.7 Mt
|
Gold
|
0.8 g/t
|
0.2 M oz
|
Proven & Probable
|
In-Situ (OP)
|
24.8 Mt
|
Gold
|
1.9 g/t
|
1.5 M oz
|
Proven & Probable
|
In-Situ (UG)
|
4 Mt
|
Gold
|
2.9 g/t
|
0.4 M oz
|
Proven & Probable
|
Total
|
36.7 Mt
|
Gold
|
1.8 g/t
|
2.1 M oz
|
Measured
|
Stockpiles
|
24.4 Mt
|
Gold
|
0.6 g/t
|
0.5 M oz
|
Measured
|
In-Situ (OP)
|
3.3 Mt
|
Gold
|
1.5 g/t
|
0.2 M oz
|
Measured
|
In-Situ (UG)
|
13 Mt
|
Gold
|
2.7 g/t
|
1.1 M oz
|
Measured
|
Total
|
40.7 Mt
|
Gold
|
1.4 g/t
|
1.8 M oz
|
Indicated
|
In-Situ (OP)
|
28.6 Mt
|
Gold
|
1.7 g/t
|
1.5 M oz
|
Indicated
|
In-Situ (UG)
|
5 Mt
|
Gold
|
2.8 g/t
|
0.5 M oz
|
Indicated
|
Total
|
33.6 Mt
|
Gold
|
1.8 g/t
|
2 M oz
|
Inferred
|
In-Situ (OP)
|
0.1 Mt
|
Gold
|
0.7 g/t
|
|
Inferred
|
In-Situ (UG)
|
32.8 Mt
|
Gold
|
2.4 g/t
|
2.5 M oz
|
Inferred
|
Total
|
32.9 Mt
|
Gold
|
2.4 g/t
|
2.5 M oz
|
Total Resource
|
Stockpiles
|
24.4 Mt
|
Gold
|
0.6 g/t
|
0.5 M oz
|
Total Resource
|
In-Situ (OP)
|
32 Mt
|
Gold
|
1.6 g/t
|
1.7 M oz
|
Total Resource
|
In-Situ (UG)
|
50.8 Mt
|
Gold
|
2.5 g/t
|
4.1 M oz
|
Total Resource
|
Total
|
107.2 Mt
|
Gold
|
1.8 g/t
|
6.3 M oz
|
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