Overview
Stage | Permitting |
Mine Type | Open Pit |
Commodities |
|
Mining Method |
|
Mine Life | 11.3 years (as of Jan 1, 2021) |
Springpole is one of the largest undeveloped gold projects in Canada. |
Source:
p. 61
First Mining acquired 100% of the Springpole Gold Project on November 13, 2015 when it completed the acquisition of Gold Canyon.
All mining claims, leases and patents are registered to Gold Canyon, a wholly-owned subsidiary of First Mining.
Contractors
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Deposit Type
- Porphyry
- Vein / narrow vein
- Epithermal
- Banded iron formation hosted
Summary:
Property Geology
The Springpole Gold Project has been extensively studied during past programs and the findings of those studies will not be covered in detail here; however, they are adequately covered in the technical reports of Zabev (2004) and Armstrong et al..., (2006).
Trachyte Porphyry Intrusion
A polyphase alkali, trachyte intrusion displaying autolithic breccia textures lies at the heart of the Springpole Gold Project. The intrusion is comprised of a system of multiple phases of trachyte believed to be part of the roof zone of a larger syenite intrusion, as fragments displaying phaneritic textures were observed from deeper drill cores in the southeast portion of the Portage zone. Early intrusive phases consist of megacrystic feldspar phenocrysts, up to 5 cm long, of albite and orthoclase feldspar in an aphanitic groundmass. Successive phases show progressively finer grained porphyritic texture while the final intrusive phases are aphanitic.
Confederation Age Volcanic and Siliciclastic Rocks
The country rocks pre-date the alkali intrusion and are composed of a complex sequence of altered and metamorphosed intermediate andesitic volcanic and associated volcaniclastic rocks, siliciclastic sedimentary rocks, chemical sediments including banded iron formation (BIF), and coarse pebble conglomerates. Devaney (2001a) indicates that the sediments are likely of the Confederation assemblage dating at around 2,740 Ma, represe ........

Summary:
Mining Methods
The PFS is based on open pit mining of the proposed Springpole pit. This pit will provide feed material necessary to maintain the process plant feed rate at 30,000 tpd while operational.
The Springpole pit will be a three phased pit which will provide 121.6 Mt of ore grading 0.97 g/t Au, and 5.23 g/t Ag. Waste from this pit will total 275.4 Mt for a strip ratio of 2.3:1 (waste:ore). With the inclusion of the proposed quarry, the total waste movement will be 287.5 Mt for a life-of-mine (LOM) strip ratio of 2.36:1 (waste:ore).
In addition to the pit, a quarry would be established near the plant location in the pre-production period. This quarry would be used to construct mine infrastructure including haul roads, cofferdams and to meet site fill requirements for other infrastructure.
The mill feed cut-off used is 0.40 g/t Au. During the mine operation material would be stockpiled to optimize the plant feed grade and defer lower-grade material until later in the mine schedule. The three grade bins used for the stockpiles included: low grade (0.40 to 0.60 g/t Au), medium grade (0.60 to 0.80 g/t Au) and high grade (over 0.80 g/t Au).
The phases are scheduled to provide 30,000 tpd of feed to the mill over an 11.3 year mine life after three years of pre-production stripping. The first two years of pre-production stripping are construction related. The last three years of mining are stockpile reclaim. The pit ........

Source:

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Flow Sheet:
Summary:

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Reserves at January 20, 2021:
Open pit mineral resources are reported at a COG of 0.3 g/t Au. COGs are based on a gold price of USD$1,550/oz and a gold processing recovery of 88% and a silver price of USD$20/oz and a silver processing recovery of 93%.
Mineral reserves are stated within the final design pit based on a USD$878/ounce gold price pit shell with a USD$1,350 /ounce gold price for revenue. The equivalent cut-off grade was 0.34 g/t Au for all pit phases.
Category | Tonnage | Commodity | Grade | Contained Metal |
Probable
|
121.6 Mt
|
Gold
|
0.97 g/t
|
3.8 M oz
|
Probable
|
121.6 Mt
|
Silver
|
5.23 g/t
|
20.5 M oz
|
Indicated
|
151 Mt
|
Gold
|
0.94 g/t
|
4.6 M oz
|
Indicated
|
151 Mt
|
Silver
|
5 g/t
|
24.3 M oz
|
Inferred
|
16 Mt
|
Gold
|
0.54 g/t
|
0.3 M oz
|
Inferred
|
16 Mt
|
Silver
|
2.8 g/t
|
1.4 M oz
|
Corporate Filings & Presentations:
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