Overview
| Stage | Permitting |
| Mine Type | Open Pit & Underground |
| Commodities |
|
| Mining Method |
- Truck & Shovel / Loader
- Longhole open stoping
- Longitudinal retreat
- Paste backfill
|
| Mine Life | 24 years (as of Jan 1, 2021) |
Toroparu Project (Cuyuni-Mazaruni, Guyana) : an advanced stage gold project with a large-scale gold-copper deposit. Following completion of the business combination between the Company and Aris Gold in September 2022 (the Aris Mining Transaction), Aris Mining announced and commenced a re-evaluation process for the Toroparu Project and reduced the previously planned expenditures on the Toroparu Project until the evaluation is complete and a development plan is fully defined. Aris Mining is progressing additional studies to update, fully-define and optimize the development plan. |
Source:
p. 7
Aris Mining owns the Toroparu Project in Guyana.
Contractors
- Subscription is required.
Deposit Type
- Orogenic
- Porphyry
- Vein / narrow vein
Summary:
Property Geology
Thin, discontinuous mineralized shear zones at the Toroparu deposit are developed mainly in the volcanic rocks. Higher grade, discontinuous shear zone hosted mineralization is narrow and mostly parallel to the schistosity. The main controls on mineralization are the west-northwest striking axial planar schistosity and vein swarms that are well developed in the volcanic rocks, and the folded contact between an intrusive complex and the volcanic rocks, particularly the contact of an igneous breccia that forms an important rheological contrast, similar to many other orogenic gold deposits that are strongly controlled by competency contrasts. The deposit dips roughly 55° to the west.
The Sona Hill deposit has similar controls on mineralization but strikes to the north and dips around 30° to the west.
Mineralization and Alteration
Mineralization at the Toroparu deposit estimated as mineral resources in the main zone has a footprint of around 1.3 km along strike, around 500 m across strike, and a depth of 550 m. There is a zone of mineral resources approximately 1.1 km to the southeast of the main zone with a footprint of around 400 m along strike, 230 m across strike, and a depth of 250 m. There are a few other small zones of mineral resources on the order of 100 m long along strike of and parallel to the main zone. The mineralized shear zones are narrow and discontinuous. Sona Hill has a footprint of around 950 m along strike, up ........
Mining Methods
- Truck & Shovel / Loader
- Longhole open stoping
- Longitudinal retreat
- Paste backfill
Summary:
The Project will be mined using open pit methods for the initial part of the extraction and in year 10 an underground mining method will be started. Both mining methods will continue to the end of the life of the asset.
Open Pit Mining
A conventional truck-shovel method was considered for the open pit portion of the Toroparu Deposit. The open pit analysis results in several distinct open pits coalescing into the NW and Main Toroparu Pits over time. The Sona Hill and Southeast Zone (SE) will be developed in a similar fashion beginning in year 3 and 6 respectively. The final dimensions of the NW Pit are approximately 990 m long x 690 m wide x 360 m deep. The dimensions of the Main Pit are approximately 1,300 m long x 750 m wide x 470 m deep. The open pit LoM plan proposes to mine approximately 93 Mt at a cut-off grade of 0.5 g/t Au and 558 Mt of waste rock material. The average stripping ratio for the open pit operations is 6:1 over the LoM. Each pit is currently planned to be developed with 29 phases each. Compacted saprolitic waste material will be used to construct haul roads, facility pads and flood control berms, levies, and other structures.
The PEA mining plan includes the Main, NW, SE and Sona Hill Pits. The Main, NW and SE pits are located within the Toroparu Deposit and the Sona Hill Pit is located within the Sona Hill deposit. The SE pit is located 1 km southeast of the Main and NW Pits and the Sona Hill Pit is located approximately 5 km ........
Source:
- subscription is required.
Flow Sheet:
Summary:
- subscription is required.
Reserves at February 10, 2023:
Open pit mineral resources are reported above a cut-off grade of 0.5 g/t gold within an optimized pit shell using a gold price of $1,650 per ounce. Underground mineral resources are reported within Mineable Stope Optimizer shapes generated at a cut-off grade of 1.5 g/t gold and is inclusive of material below 1.5 g/t gold within those shapes.
| Category | Tonnage | Commodity | Grade | Contained Metal |
|
Measured
|
42.4 Mt
|
Gold
|
1.45 g/t
|
1,975 koz
|
|
Measured
|
42.4 Mt
|
Copper
|
0.14 %
|
61 kt
|
|
Measured
|
42.4 Mt
|
Silver
|
1.8 g/t
|
2,457 koz
|
|
Indicated
|
72.6 Mt
|
Gold
|
1.46 g/t
|
3,398 koz
|
|
Indicated
|
72.6 Mt
|
Copper
|
0.08 %
|
57 kt
|
|
Indicated
|
72.6 Mt
|
Silver
|
1.2 g/t
|
2,893 koz
|
|
Measured & Indicated
|
115 Mt
|
Gold
|
1.45 g/t
|
5,373 koz
|
|
Measured & Indicated
|
115 Mt
|
Copper
|
0.1 %
|
118 kt
|
|
Measured & Indicated
|
115 Mt
|
Silver
|
1.5 g/t
|
5,350 koz
|
|
Inferred
|
21.2 Mt
|
Gold
|
1.71 g/t
|
1,168 koz
|
|
Inferred
|
21.2 Mt
|
Copper
|
0.04 %
|
9 kt
|
|
Inferred
|
21.2 Mt
|
Silver
|
0.8 g/t
|
517 koz
|
Pipelines and Water Supply
Source:
- subscription is required.
Corporate Filings & Presentations:
- Subscription is required.
- Subscription is required.