Overview
Status | Temporary Suspension |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 6 years (as of Jan 1, 2019) |
Beaver Dam open pit mine is part of Atlantic Operation.
As of September 26, 2023 the Impact Assessment Agency of Canada terminated the environmental assessment of the project at the request of the proponent.
St Barbara anticipates updating the Mineral Resource and Ore Reserve for Beaver Dam during the March 2024 quarter. |
Source:
p. 85
St Barbara Limited owns the Atlantic Gold operation through its wholly owned subsidiary Atlantic Mining NS Inc.
Contractors
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Deposit Type
- Mesothermal
- Orogenic
- Vein / narrow vein
Summary:
The known deposits within the Atlantic operation area are considered to be examples of turbidite-hosted, orogenic mesothermal gold deposits.
Strata of the Meguma Terrane in eastern mainland Nova Scotia include the basal greywacke-dominated Goldenville Group and the overlying, finer-grained, argillitedominated Halifax Group. Cochrane Hill is hosted in the basal Goldenville Group.
The Beaver Dam deposit is hosted in the southern limb of a north-dipping overturned anticlinal fold. The Moose River Formation is relatively thick in the vicinity of the Beaver Dam deposit.
Structure
The host stratigraphy is offset into segments by two northwest-trending faults; the sinistral Mud Lake Fault and the dextral Cameron Flowage Fault. The Mud Lake Fault truncates, and forms the eastern boundary to, the Main Zone mineralization.
Metamorphism
Lithologies at Beaver Dam have been metamorphosed to amphibolite facies (biotite grade) increasing to higher (staurolite) grade with proximity to the River Lake Pluton, the contact of which is about 2 km west of the Beaver Dam deposit.
Mineralization
Gold mineralization at Beaver Dam has been recognised over a strike length of approximately 1.4 km, extending from the Main Zone northwest to the Mill Shaft Zone. Historical drilling has shown that mineralization weakens between the Main Zone and Mill Shaft Zone. The eastern end of the main zone is controlled by the Mud Lake Fault and ........
Summary:
2023 - The St Barbara has withdrawn existing permit and the previous development plans for Beaver Dam.
Description as at 2019
Mining is based on conventional open pit methods suited for the project location and local site requirements.
Mine operations are anticipated to begin at Touquoy, and move to Beaver Dam once the Touquoy pit reserves are exhausted in year 5.
B621 targets the south portion of the deposit, which contains a higher grade gold and lower strip ratio than the north portion. This phase contains about 1.5 years’ worth of mill feed and mines from the pit exit at the 130 m elevation, down to the pit bottom at the 45 m elevation. The ramp runs counter-clockwise down from the 130 m pit exit in the east of the pit and switchbacks at the 85 m bench elevation.
B622 pushes the north and east wall to the ultimate limits and extends the bottom of the pit below the first pit phase. This phase contains about 1.5 years’ worth of mill feed and mines from the pit exit at the 130 m elevation, down to the pit bottom at the -45 m elevation. The ramp runs counter-clockwise down from the 130 m pit exit in the east of the pit.
The Beaver Dam operations require an additional two excavators and one wheel loader.
The hydraulic excavators are specified to handle the bulk of excavation from the pits, including all identified mineralized zones and the waste rock in those mineralized zones. The wheel loader is speci ........
Source:
p.332-336
Source:
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Flow Sheet:
Summary:
- subscription is required.
Combined production numbers are reported under
Atlantic Operation
Operational Metrics:
Metrics | |
Stripping / waste ratio
| 5.9 * |
Waste tonnes, LOM
| 40,384 kt * |
Ore tonnes mined, LOM
| 6,897 kt * |
Total tonnes mined, LOM
| 47,281 kt * |
Tonnes milled, LOM
| 6,897 kt * |
* According to 2019 study.
Reserves at December 31, 2022:
Ore Reserves are based on a gold price of C$1,948/oz.
Mineral Resources are reported inclusive of Mineral Reserves.
Category | Tonnage | Commodity | Grade | Contained Metal |
Proven
|
4,340 kt
|
Gold
|
1.4 g/t
|
195 koz
|
Probable
|
3,490 kt
|
Gold
|
1.3 g/t
|
150 koz
|
Proven & Probable
|
7,840 kt
|
Gold
|
1.4 g/t
|
345 koz
|
Measured
|
5,126 kt
|
Gold
|
1.3 g/t
|
210 koz
|
Indicated
|
4,757 kt
|
Gold
|
1.2 g/t
|
185 koz
|
Inferred
|
1,177 kt
|
Gold
|
1.4 g/t
|
52 koz
|
Total Resource
|
11,060 kt
|
Gold
|
1.3 g/t
|
447 koz
|
Commodity Production Costs:
| Commodity | Units | Average |
Assumed price
|
Gold
|
USD
|
......
|
* According to 2019 study / presentation.
Operating Costs:
| Units | 2019 |
OP mining costs ($/t milled)
|
CAD
| 18 * |
Processing costs ($/t milled)
|
CAD
| ...... |
Total operating costs ($/t milled)
|
CAD
| ...... |
* According to 2019 study.
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2019 Study Costs and Valuation Metrics :
Metrics | Units | LOM Total |
Pre-Production capital costs
|
$M CAD
|
......
|
Sustaining CapEx
|
$M CAD
|
......
|
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Corporate Filings & Presentations:
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