Overview
Stage | Permitting |
Mine Type | Open Pit & Underground |
Commodities |
|
Mining Method |
- Truck & Shovel / Loader
- Longhole open stoping
- Longitudinal retreat
- Cemented paste backfill
|
Mine Life | 24 years (as of Jan 1, 2021) |
Toroparu is advanced multi-million-ounce development project.
As of July 2023, Aris Mining is focused on a re-evaluation of the Toroparu Project, including a review to validate the previous management team's plan to construct the processing plant in two phases. During this period and until the development plan is fully defined, Aris Mining is reducing previously planned expenditures. |
Source:
p. 19,126
Company | Interest | Ownership |
Aris Mining Corp.
|
100 %
|
Indirect
|
ETK Inc.
(operator)
|
100 %
|
Direct
|
The Toroparu Project is 100% owned by Aris Mining through its indirectly owned subsidiary, ETK Inc.
Contractors
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Deposit Type
- Saprolite
- Orogenic
- Porphyry
- Vein / narrow vein
Summary:
Deposit Types
The interpretation of the deposit type at Toroparu is uncertain, with possibilities including an unusually copper rich orogenic gold deposit on the basis of the host greenschist metamorphic rocks and a strong control of mineralization due to competency contrasts, as well as a metamorphosed porphyry gold-copper deposit. Recent structural interpretation work suggests that Toroparu is not a classic lode type orogenic gold deposit and is unlikely to be a deformed porphyry deposit (Pratt and Smeraglia, 2022). A disseminated or sheeted vein type deposit can be used as a guide for exploration planning purposes.
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.
Two dyke phases are present including hornbl ........
Mining Methods
- Truck & Shovel / Loader
- Longhole open stoping
- Longitudinal retreat
- Cemented 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:
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Flow Sheet:
Summary:
- subscription is required.
Pipelines and Water Supply
Source:
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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
|
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