Revival Gold
Inc. (TSXV: RVG,
OTCQX: RVLGF) (“Revival Gold” or
the “Company”), is pleased to report impressive continued growth in
the Company’s Mineral Resources and the completion of a Preliminary
Feasibility Study (“PFS”) on the potential open pit heap leach
restart of the Beartrack-Arnett Gold Project (“Beartrack-Arnett” or
the “Project”) located in the western United States.
Mineral Resource Update
Highlights
- The updated Mineral
Resource is based on 172,244 meters of drilling through the end of
2022 and contains:
- A Measured &
Indicated Mineral Resource of 86.2 million tonnes at
0.87 g/T gold containing 2.42 million ounces of
gold1, an increase of
14% over the 2022 Measured & Indicated Mineral
Resource2; and,
- An Inferred Mineral
Resource of 50.7 million tonnes at 1.34 g/T gold
containing 2.19 million ounces of gold1, an
increase of 13% over the 2022 Inferred Mineral
Resource2;
- Contained
gold in open pit heap leach Measured & Indicated Resources
increased 142%2 to 42.3 million tonnes at 0.70 g/T gold
containing 959,000 ounces of gold with additional Inferred
Resources of 6.3 million tonnes at 0.53 g/T gold containing 108,000
ounces of gold; and
- Contained gold in
underground mill Inferred Resources increased 180%
to 6.7 million tonnes at 4.0 g/T gold containing 877,000 ounces of
gold with a 33% increase in grade over the 2022
Inferred Mineral Resource2.
Open Pit Heap Leach Restart PFS
Highlights
- Inaugural
Proven & Probable open pit heap leach Mineral
Reserve of 36.2 million tonnes at 0.74 g/T gold for 859,000
ounces of gold3;
- Average
gold production of 65,300 ounces of gold per year, for a
total of 529,100 ounces of gold over an eight-year mine
life;
-
Pre-production capital of $109 million, working
capital of $5 million, and life-of-mine (“LOM”) sustaining capital
of $100 million, reflecting only a modest increase in capital
relative to the 2020 Preliminary Economic Assessment;
- Total cash
cost of $986 per ounce and All-In Sustaining Cost
(“AISC”) of $1,235 per ounce of gold;
- After-tax
NPV at a 5% discount rate
(“NPV5%”) of $105
million and after-tax IRR of 24.3% at $1,800 per
ounce gold increasing to an NPV5% of $138 million and
after-tax IRR of 29.5% at $1,900 per ounce gold;
- After-tax
payback period of 3.4 years at $1,800 per ounce
gold decreasing to 3.1 years at $1,900 per ounce
gold;
- Low
technical and execution risk of a brownfield project with
existing infrastructure, minimal pre-production earthworks and mine
pre-stripping, limited planned disturbance outside the Project’s
current footprint, and a high proportion of low-risk pre-production
capital expenditures on mechanical equipment;
- Excellent
additional exploration potential with exploration drilling
currently underway on high grade open pit oxide opportunities at
Roman’s Trench and Haidee that offer near term opportunities to
extend the open pit heap leach PFS mine life; and,
- Opportunity
to pursue a potential second phase mill operation with
Mineral Resources that provide optionality to begin underground or
with an open pit, or concurrently develop both.
“Completion of this PFS marks a significant
de-risking milestone for Revival Gold,” said Hugh Agro, President
& CEO. “Beartrack-Arnett presents a unique opportunity for
meaningful US gold production from a low-risk, low capital restart
of an established domestic mine site. The project features robust
economics including an attractive 24% after-tax IRR at $1,800 gold
which increases to 30% at current prices,” added Agro.
“Beyond the first phase of open pit heap leach
production addressed in the PFS, potential exists for Revival Gold
to pursue a second phase of underground and open pit mill
operations. The more than doubling in Measured & Indicated open
pit heap leach resources and near tripling of underground Inferred
resources reflected in today’s update speaks to the impressive
ongoing exploration and development potential at Beartrack-Arnett.
With completion of the PFS, Revival Gold is now positioned to
progress environmental and permitting preparations, fine tune
engineering and design plans and advance the proposed
Beartrack-Arnett project schedule. Meanwhile, exploration continues
with drilling having resumed this month,” said Agro.
The Mineral Resource estimate, Mineral Reserve
estimate, and PFS were prepared in accordance with National
Instrument 43-101 (“NI 43-101”) by Kappes, Cassiday &
Associates (“KCA”), Independent Mining Consultants, Inc. (“IMC”),
KC Harvey Environmental (“KC Harvey”) and WSP USA Environmental
& Infrastructure Inc. (“WSP”), collectively the “Study
Authors”, with an effective date of June 30th, 2023. The Company
will file a technical report summarizing the PFS on
www.revival-gold.com and on SEDAR at www.sedar.com in accordance
with NI 43-101 within 45 days.
Conference Call
Management will host a conference call later
this morning to discuss the results of the Mineral Resource update
and PFS. Call-in information below:
|
Scheduled
Start: |
Tuesday, July
11th, 2023, 10:00 am EST |
|
Call-In Number: |
416-764-8658 |
|
Toll Free in North America: |
888-886-7786 |
A replay of the conference call will be
available for one week at 416-764-8691 or toll free in North
America at 877-674-6060. Playback passcode 416972#.
Further Details
Mineral Resource Estimate
The Mineral Resource estimate has been reported
in accordance with NI 43-101 and was prepared by IMC with an
effective date of June 30th, 2023. Table 1 provides the
pit-constrained and underground Beartrack-Arnett Gold Project
Mineral Resource estimate, which includes oxide, transition, and
sulphide material.
Table 2 summarizes the Mineral Resource
definition parameters used to develop the Mineral Resource
estimate. The Measured and Indicated Mineral Resources were
estimated at a gold price of $1,900 per ounce.
Table 1: Beartrack-Arnett Gold
ProjectMineral Resources by Material Type and
Location
Resource Type |
Location |
Resource Category |
Mineral Resources |
Resource |
Grade |
Contained |
(kT) |
(g/T) |
(koz) |
Heap LeachMineral Resource |
Open Pit |
Beartrack |
Measured |
6,743 |
1.03 |
224 |
Indicated |
18,781 |
0.77 |
466 |
Inferred |
2,694 |
0.51 |
45 |
Haidee |
Measured |
5,932 |
0.48 |
92 |
Indicated |
10,880 |
0.51 |
177 |
Inferred |
3,624 |
0.55 |
64 |
Open Pit |
Beartrack& Haidee |
Measured |
12,675 |
0.78 |
316 |
Indicated |
29,661 |
0.67 |
643 |
Measured + Indicated |
42,336 |
0.70 |
959 |
Inferred |
6,318 |
0.53 |
108 |
MillMineral Resource |
Open Pit |
Beartrack |
Measured |
6,557 |
1.10 |
231 |
Indicated |
37,290 |
1.03 |
1,233 |
Inferred |
37,666 |
0.99 |
1,204 |
Underground |
Beartrack |
Inferred |
6,745 |
4.05 |
877 |
Open Pit &Underground |
Beartrack |
Measured |
6,557 |
1.10 |
231 |
Indicated |
37,290 |
1.03 |
1,233 |
Measured + Indicated |
43,847 |
1.04 |
1,464 |
Inferred |
44,411 |
1.46 |
2,082 |
TotalMineralResource |
Open Pit &Underground |
Beartrack& Haidee |
Measured |
19,232 |
0.88 |
547 |
Indicated |
66,951 |
0.87 |
1,876 |
Measured + Indicated |
86,184 |
0.87 |
2,423 |
Inferred |
50,728 |
1.34 |
2,190 |
|
|
Notes: 1) Gold price used for
Mineral Resources:
$1,900/oz. 2) Gold grades are
reported in grams per metric tonne
(g/T). 3) Economic cutoff is
based on Income Net of Process = $0.01/tonne. Income Net of Process
= (Grade x Recovery x ($1,900 - $5)) - (Process Cost + G&A).
Beartrack heap leach process cost and process recovery varies with
CN/FA ratio. 4) Beartrack average
heap leach gold recovery = 51% of FA, which excludes secondary
leach recovery that is included in the PFS recovery calculations.
Beartrack heap leach ore types are: CN/FA > 0.7 = Oxide, 0.2 to
0.7 CN/FA = Transition, CN/FA < 0.2 = Sulphide. Beartrack base
heap leach mining cost and average processing cost including
G&A = $2.04/T and $6.88/T, respectively. Beartrack heap leach
throughput = 12,000 T/d. Beartrack approximate FA cutoff grades for
heap leach resource = Oxide = 0.15 g/T, Transition = 0.29 g/T,
Sulphide = 0.96 g/T. 5) Haidee
heap leach recovery = 86% of FA. Haidee base heap leach open pit
mining cost and average processing cost including G&A = $2.04/T
and $6.78/T, respectively. Haidee heap leach throughput = 12,000
T/d. Haidee heap leach resource cutoff grade = 0.17
g/T. 6) Beartrack mill sulphide
recovery = 94%. Beartrack base mill open pit mining cost and
processing cost including G&A = $2.14/T and $24.83/T,
respectively. Beartrack average mill underground mining cost and
processing cost including G&A = $100.00/T and $35.52/T,
respectively. Beartrack mill open pit throughput = 12,000 T/d.
Standalone underground throughput = 2,500 T/d. Beartrack open pit
mill sulphide resource cutoff = 0.43 g/T. Beartrack underground
mill resource cutoff = 2.37
g/T. 7) Total surface mine
material moved: 449,504
kT. 8) Mineral Resources include
Mineral Reserves. 9) Numbers may
not add exactly due to rounding. |
Table 2: Beartrack-Arnett Gold
ProjectMineral Resource Estimate Definition
Parameters
Mineral ResourceDefinition Parameters |
Units |
Mill Parameters |
Heap Leach Parameters |
BeartrackUnderground |
BeartrackOpen Pit |
BeartrackOpen Pit |
HaideeOpen Pit |
General |
Mineral Resource Gold Price |
$/oz |
$1,900 |
|
Mining / Processing Rate |
T/d |
2,500 |
12,000 |
|
12,000 |
|
Average Process Recovery |
% |
|
94% |
|
51%1 |
|
86% |
|
Mining OPEX |
Base Mining |
$/T |
$100.00 |
$2.14 |
|
$2.04 |
$2.04 |
|
Incremental Bench Mining |
$/T |
- |
|
- |
|
$0.04 |
$0.02 |
|
per bench below listed elevation |
ft |
- |
|
- |
|
7,075 |
7,340 |
|
Processing OPEX including G&A |
Oxide (CN/FA > 0.7) |
$/T |
- |
|
- |
|
$6.62 |
$6.78 |
|
Transition (CN/FA > 0.2 < 0.7) |
$/T |
- |
|
- |
|
$7.31 |
|
- |
|
Sulphide (CN/FA < 0.2) |
$/T |
$35.52 |
$24.83 |
|
$8.02 |
|
- |
|
Incremental Ore Haul |
$/T |
- |
|
- |
|
|
- |
$2.19 |
|
Other Costs |
Refining & Freight |
$/oz |
$5.00 |
|
$5.00 |
|
Open Pit Slope Angles |
Tertiary, Dykes, Till, Fill |
degrees |
- |
38 |
|
38 |
|
Rapakivi Granite |
degrees |
- |
45 |
|
45 |
|
Yellowjacket |
degrees |
- |
45 |
|
45 |
|
Economic Cutoff Values |
Net of Process Revenue |
$/T |
$100.00 |
$0.01 |
|
$0.01 |
$0.01 |
|
Approximate Contained Gold Cutoff Grades |
Heap Leach Oxide |
g/T |
- |
|
- |
|
0.15 |
0.17 |
|
Heap Leach Transition |
g/T |
- |
|
- |
|
0.29 |
|
- |
|
Heap Leach Sulphide |
g/T |
- |
|
- |
|
0.96 |
|
- |
|
Mill Sulphide |
g/T |
2.37 |
0.43 |
|
|
- |
|
- |
|
Note: 1) This value represents
the average metallurgical recovery of the Beartrack heap leach
Mineral Resource inside the PFS pit; however, the recoveries used
to define the PFS Mineral Resource were calculated on a
block-by-block basis using the following equation: 0.8852 * CN/FA -
0.0612, where CN is the cyanide soluble gold estimate for a given
block and FA is the contained gold estimated for a given block.
This value excludes secondary leach recovery, which is included in
the KCA PFS recovery calculations. |
Table 3 illustrates the sensitivity of the total
Mineral Resource to changes in gold price from $1,800 per ounce up
to $2,000 per ounce.
Table 3: Beartrack-Arnett Gold
ProjectMineral Resources Sensitivity to Gold
Price
Mineral Resource Categoryand Gold Price |
ResourceTonnage(kT) |
ContainedGold Grade(g/T) |
ContainedGold(koz) |
Mineral Resource Sensitivity at $1,800/oz Gold |
Total Measured + Indicated |
83,017 |
0.88 |
2,360 |
Total Inferred |
44,674 |
1.39 |
2,003 |
Base Case Mineral Resource at $1,900/oz Gold |
Total Measured + Indicated |
86,184 |
0.87 |
2,423 |
Total Inferred |
50,728 |
1.34 |
2,190 |
Mineral Resource Sensitivity at $2,000/oz Gold |
Total Measured + Indicated |
97,295 |
0.81 |
2,525 |
Total Inferred |
63,597 |
1.19 |
2,441 |
Inferred Mineral Resources include 6.7 million
tonnes of underground material at 4.0 g/T gold containing 877,000
ounces of gold. The increase in underground Inferred Mineral
Resources since 2022 is, in part, derived from a more focused
approach to mining and the elimination of an open pit in the Joss
Target areas. The pit elimination would reduce the environmental
footprint of the potential mill phase and accelerate the expected
permitting and development timelines for the potential mill
production phase to commence.
Underground mining is assumed to utilize an
overhand cut and fill approach on a “stand-alone” basis with a
cut-off grade of 2.37 g/T gold. The underground Mineral
Resource occurs in both the South Pit and Joss areas and vertically
over an elevation of approximately 580 meters. The underground
Inferred Mineral Resource dips at approximately 80-90 degrees and
ranges in thickness from about 3 to 25 meters.
Table 4 summarizes the sensitivity of the
Beartrack underground Mineral Resource to changes in cutoff gold
grade. All underground scenarios in Table 4 are for Mineral
Resources that sit below mill open pit Mineral Resource.
Table 4: Beartrack-Arnett Gold
ProjectUnderground Mineral Resources Sensitivity
to Cutoff Gold Grade
CutoffGold Grade(g/T) |
GoldPrice($/oz) |
Inferred MineralResource Tonnage(kT) |
ContainedGold Grade(g/T) |
ContainedGold(koz) |
2.00 |
2,250 |
12,470 |
3.22 |
1,292 |
2.26 |
2,000 |
8,194 |
3.77 |
994 |
2.37 |
1,900 |
6,746 |
4.05 |
877 |
2.50 |
1,800 |
5,517 |
4.39 |
778 |
2.64 |
1,700 |
4,295 |
4.87 |
672 |
2.74 |
1,640 |
3,385 |
5.38 |
586 |
Note: A cutoff gold grade of 2.37 g/T defines the Base Case
underground mineral resource. |
Figure 1 presents an overview of the
Beartrack-Arnett Project area and the location of Mineral Resources
on the property.
Figure 1: Beartrack-Arnett Gold
ProjectMineral Resource
Areas1 and Land
Position
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/538fc038-93b9-4a8d-b066-2008b29088ee
Note:
1) See
Revival Gold news release dated July 11th, 2023, for additional
details on Mineral Resources and press releases dated October 2nd,
2017, March 15th, 2022, and September 22nd, 2022, for additional
details on drill results depicted here.
Mineral Reserve Estimate
The PFS and associated Mineral Reserve estimate
was developed based on the open pit heap leach Measured and
Indicated portion of the Beartrack and Haidee Mineral Resource
estimates. The Proven and Probable Mineral Reserves for the Project
were estimated at a gold price of $1,700 per ounce and are
summarized in Table 5.
Table 5: Beartrack-Arnett Gold
ProjectMineral Reserve Estimate by Location and
Category
Deposit |
Mineral Reserve Category |
Mineral Reserves |
Tonnage |
Gold Grade |
Contained Gold |
(kT) |
(g/T) |
(koz) |
Beartrack |
Proven |
6,420 |
1.06 |
219 |
Probable |
15,600 |
0.82 |
413 |
Proven + Probable |
22,020 |
0.89 |
632 |
Haidee |
Proven |
5,933 |
0.48 |
92 |
Probable |
8,244 |
0.51 |
136 |
Proven + Probable |
14,177 |
0.51 |
228 |
Total Proven |
12,353 |
0.78 |
311 |
Total Probable |
23,844 |
0.72 |
549 |
Total Proven + Probable |
36,197 |
0.74 |
859 |
Notes: 1) Gold price used for
Mineral Reserves:
$1,700/oz. 2) Gold grades are
reported in grams per metric tonne,
g/T. 3) Cutoff gold grade is
based on Net of Process Revenue =
$0.01/tonne. Net of Process Revenue = (Grade
x Recovery x ($1,700 - $5)) - (Process Cost + G&A).Process cost
varies with CN/FA ratio. Process recovery varies by CN/FA
ratio. 4) Typical FA gold cutoff
grades are: 0.17 g/T oxide, 0.33 g/T transition, 1.07 g/T
sulphide. 5) Total open pit
material: 124,413 kT. 6) Numbers
may not add exactly due to rounding. |
Open Pit Heap Leach PFS
The PFS was developed as an initial phase of
open pit mining with approximately 36.2 million tonnes of heap
leachable ore from the Beartrack and Haidee deposits at an average
rate of 12,000 tonnes/day for a period of 8.1 years. The PFS mine
fleet is conventional with loading accomplished by three 11 m3
front loaders matched to up to thirteen 90-tonne class haul
trucks. Run-of mine ore from the open pits would be
processed in a conventional, mobile crushing circuit to achieve a
particle size of 100% passing 38 mm (1.5 inch). Crushed ore
would be conveyor stacked onto heap leach pads and leached with a
low concentration cyanide solution. The resulting pregnant leach
solution would be processed in an existing, refurbished,
adsorption-desorption-recovery (“ADR”) plant for the recovery of
gold resulting in the production of a final doré product.
During the first five years of mine operations,
ore would be mined from the Beartrack pits (North, South, and
Mason-Dixon pits), then crushed, conveyor stacked, and leached on a
dedicated leach pad at the Beartrack site. During the last three
years of mine operations, mining would transition to the Haidee pit
in the Arnett area. Prior to mining at Haidee, a two-way haul road
between the Haidee and Beartrack sites would be constructed and a
dedicated leach pad for the Haidee ore would also be constructed,
adjacent to the Beartrack leach pad site.
LOM average metallurgical recovery for the
Project is approximately 62% of contained gold and the estimated
average annual gold production would be 65,300 ounces per year.
Economics for the PFS are based on mining and processing the heap
leach Mineral Resources only; mining and processing of mill Mineral
Resources would be a separate second phase project.
Mine and Gold Production
Schedule
The PFS mine plan was developed using
conventional open pit hard rock mining methods. The mining
operation was developed to deliver 4.38 million tonnes of leachable
material to the primary crusher per year (nominally 12,000 tonnes
per day). Table 6 provides the PFS mine schedule.
Table 6: PFS Mine and Gold Production
Schedule
Year |
Beartrack |
Haidee |
Life-of Mine Totals |
Ore(kT) |
GoldGrade(g/T) |
WasteRock(kT) |
Ore(kT) |
GoldGrade(g/T) |
WasteRock(kT) |
Ore(kT) |
RecoveredGold(oz) |
WasteRock(kT) |
StrippingRatio(w/o) |
PP |
1,088 |
0.75 |
3,538 |
|
|
|
1,088 |
|
3,538 |
3.3 |
YR01 |
4,379 |
0.62 |
13,490 |
|
|
|
4,379 |
68,350 |
13,490 |
3.1 |
YR02 |
4,379 |
0.62 |
13,490 |
|
|
|
4,379 |
56,852 |
13,490 |
3.1 |
YR03 |
4,379 |
0.75 |
13,490 |
|
|
|
4,379 |
66,537 |
13,490 |
3.1 |
YR04 |
4,379 |
1.03 |
13,519 |
|
|
|
4,379 |
75,692 |
13,519 |
3.1 |
YR05 |
3,411 |
1.65 |
3,026 |
604 |
0.51 |
5,684 |
4,015 |
68,402 |
8,710 |
2.2 |
YR06 |
|
|
|
4,379 |
0.50 |
8,673 |
4,379 |
67,651 |
8,673 |
2.0 |
YR07 |
|
|
|
4,379 |
0.51 |
8,801 |
4,379 |
61,518 |
8,801 |
2.0 |
YR08 |
|
|
|
4,379 |
0.47 |
4,031 |
4,379 |
56,470 |
4,031 |
0.9 |
YR09 |
|
|
|
433 |
0.52 |
317 |
433 |
7,431 |
317 |
0.7 |
YR10 |
|
|
|
|
|
|
|
148 |
|
|
Total |
22,017 |
0.89 |
60,552 |
14,175 |
0.51 |
27,506 |
36,191 |
529,051 |
88,058 |
2.4 |
Notes:
1) Recovered
Gold includes heap leach and ore processing recovery delay and
secondary leaching per
PFS. 2) Numbers
may not add exactly due to rounding. |
Infrastructure
Much of the infrastructure from the original
Beartrack mining operation remains in serviceable condition.
Wherever possible, refurbishment and reuse of the existing
infrastructure is planned, including the following:
- Site access and
onsite roads;
- Fencing and
gates;
- Fuel and water
tanks;
- Process solution,
overflow (event), and other storm and treated water retention ponds
and process solution channels;
- Groundwater
monitoring and stormwater management systems;
- Water treatment
plant;
- Septic
systems;
- Core
warehouse;
- ADR plant /
laboratory; and,
- Power substation
and overhead power distribution lines.
All other major infrastructure from the previous
operations were removed as part of prior site reclamation efforts
and would need to be replaced for future operations. The primary
new infrastructure that would be required to support the PFS plan
include:
- Ore crushing and
conveyor stacking systems;
- Process solution
distribution and collection systems;
- Heap leach
pads;
- Additional process
solution pond;
- Haidee haul
road;
- Truck shop and
warehouse; and,
- Administration and
office buildings.
Heap Leach Metallurgy and Ore
Processing
The primary source of data that forms the basis
of the PFS heap leach metallurgical recovery estimates include
twelve 6-to-12-month duration column leach tests completed by SGS
Mineral Services in Ontario, Canada, developed from nine bulk
composites from Beartrack and Haidee drill core along with 36
corresponding coarse ore bottle roll tests. Production
statistics from historical Beartrack operations were also used to
supplement the SGS column leach testing results.
Crushing of run-of-mine ore would be
accomplished by a two-stage mobile crushing circuit that includes a
primary jaw crusher and two secondary cone crushers. Crushed ore
would be stockpiled using a fixed stacker and reclaimed using belt
feeders to a reclaim conveyor; pebble lime would be added to the
reclaim conveyor for pH control. During the initial five years of
operations, ore would be conveyed to the heap stacking system at
the Beartrack leach pad. During the final three years of operation,
the mobile crushing circuit and conveyor stacking system would be
relocated on the Beartrack site to serve the Haidee dedicated leach
pad.
Crushed ore would be stacked in 10-meter-high
lifts and leached using a buried drip irrigation system. Gold
bearing pregnant leach solution would drain by gravity to the
existing pregnant solution pond where it would be pumped to the
existing carbon adsorption circuit. Gold-cyanide compounds would be
loaded onto activated carbon in the adsorption circuit; the
resulting barren solution would flow by gravity to the barren
solution tanks then pumped to the heap for additional leaching.
High strength cyanide solution would be injected into the barren
solution to maintain the desired cyanide concentration in the leach
solutions.
Gold would be stripped from the loaded carbon
using a modified pressure Zadra process and recovered by
electrowinning. Cathodes from the electrowinning cells would be
washed and the resulting precious metal sludge treated in a retort
to recover mercury, followed by smelting to produce the final doré
product. Carbon would be acid-washed to remove scale
and other inorganic contaminants, and thermally regenerated using a
rotary kiln.
The estimated average gold recovery from the
heap leach pads based on the PFS mine and ore processing production
schedule is estimated to be 62%. The estimated average recovery
reflects recoveries of 78% for oxide material, 43% for transition
material and 14% for sulphide material.
Capital and Operating Cost
Estimates
Ore processing, infrastructure, and general and
administrative (“G&A”) capital and operating cost estimates for
the Beartrack-Arnett PFS were developed by KCA. Mining equipment,
mining preproduction, and mine operating cost estimates were
developed by IMC. Closure, water treatment, and permitting related
cost estimates were developed by KC Harvey with input from KCA and
IMC. Capital and operating costs were estimated based on first
quarter 2023 US dollars.
Capital costs for all major and most minor
equipment, as well as contractor quotes for major construction
contracts, were estimated from one or more supplier quotes. Where
project specific quotes were unavailable, estimates were developed
from applicable recent analogue project quotes. Table 7 provides a
summary of the PFS capital costs.
Table 7: PFS Capital Cost
Estimate
Description |
Costs($,000) |
Pre-Production Capital |
Process & Infrastructure Capital |
$56,820 |
Mining Capital & Pre-Production |
$28,230 |
Indirect & Owner's Costs |
$4,258 |
EPCM |
$6,704 |
Contingency |
$11,067 |
Process Pre-Production |
$2,252 |
Total Pre-Production Capital |
$109,331 |
Working Capital & Initial Fills |
Mining Working Capital |
$2,988 |
Processing Working Capital |
$1,704 |
G&A Working Capital |
$367 |
Initial Fills |
$166 |
Total Working Capital |
$5,225 |
Sustaining Capital |
Process & Infrastructure |
$40,663 |
Indirect & EPCM |
$7,319 |
Mining |
$43,916 |
Contingency |
$8,133 |
Total Sustaining Capital |
$100,031 |
Reclamation & Closure Capital |
Direct Costs |
$12,510 |
EPCM & Indirect Costs |
$1,877 |
Operating Costs |
$6,258 |
Heap Leach Rinsing & Neutralization |
$7,009 |
Contingency |
$4,148 |
Total Reclamation & Closure Capital |
$31,802 |
Ore processing and G&A costs were estimated
by KCA from first principles. Labor costs were estimated using
project specific staffing, salary, wage, and benefit requirements.
Unit consumptions of materials, supplies, power, water and
delivered supply costs were also estimated. The operating costs
presented are based upon the ownership of all process production
equipment and site facilities, including the onsite laboratory.
Revival would employ and direct all process operations,
maintenance, and support personnel for all site activities.
Mining costs provided by IMC are based on owner
mining costs using leased mining equipment. Leases are based on a
four-year term; consequently, all leased equipment would be owned
by Revival before the end of mining operations.
Economic Analysis
Based on the estimated production schedule,
capital costs and operating costs, a cash flow model was prepared
by KCA for the economic analysis of the Project. All information
used in this economic evaluation was derived from work completed by
KCA, IMC and KC Harvey, with support by Revival.
The project economics were evaluated using a
discounted cash flow method that measures the Net Present Value
(“NPV”) of future cash flow streams. The PFS economic model was
based on the following key assumptions:
- A gold price of
$1,800 per ounce.
- The mine production
schedule developed by IMC with a nominal mining and ore processing
rate of 12,000 tonnes per day.
- A period of
analysis of 13 years that includes one year of investment and
pre-production, 8.1 years of production, and 3.9 years for
reclamation and closure.
- Capital and
operating costs as summarized in the preceding section.
The Project economics based on these criteria
from the cash flow model are summarized in Table 8.
Table 8: PFS Economic Analysis
Summary
Production Data |
Life of Mine |
|
8.1 |
Years |
Annual Average Ore Mined and Leached |
|
4,380,000 |
tonnes/year |
LOM Average Head Grade |
|
0.74 |
g/T |
LOM Gold Recovery |
|
61.6 |
% |
Average Annual Gold Production |
|
65,324 |
ounces |
Total Gold Produced |
|
529,051 |
ounces |
LOM Strip Ratio (Waste:Ore) |
|
2.4 |
|
Capital Costs |
Initial Capital |
$109 |
million |
Working Capital & Initial Fills |
$5 |
million |
LOM Sustaining Capital |
$100 |
Million |
Reclamation & Closure Capital |
$32 |
Million |
LOM Average Operating Costs |
Mining |
$8.30 |
/tonne ore |
Processing & Support |
$4.73 |
/tonne ore |
G&A |
$1.02 |
/tonne ore |
Total Cash Cost |
$986 |
/ounce |
All-in Sustaining Cost (ASIC) |
$1,235 |
/ounce |
Financial Parameters |
Gold Price |
$1,800 |
/ounce |
Internal Rate of Return, Before Tax |
|
27.7 |
% |
Internal Rate of Return, After Tax |
|
24.3 |
% |
Average Annual Cashflow, Before Tax |
$41 |
million |
Average Annual Cashflow, After Tax |
$37 |
million |
Net Present Value @ 5%, Before Tax |
$130 |
million |
Net Present Value @ 5%, After Tax |
$105 |
million |
Pay-Back Period |
|
3.4 |
years |
Figure 2 presents the annual and cumulative
after-tax cash flow from pre-production through mine closure at
$1,800 per ounce gold.
Figure 2: PFS After-Tax Cash
Flow
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/835b1d57-5227-46fe-a46c-660582e53e46
A sensitivity analysis was performed using the
PFS economic model. Figure 3 and Figure 4 provide the after-tax IRR
and after-tax NPV5% sensitivities to gold price, capital cost, and
operating cost, respectively.
Figure 3: PFS After-Tax IRR Sensitivity
Analysis
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/425b6f59-bb2c-40f0-b343-47916238a050
Figure 4: PFS After-Tax
NPV5% Sensitivity
Analysis
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/85cc6162-b07e-4519-b926-57134d526032
Key Opportunities &
Risks
Key opportunities identified by the Study
Authors for the Beartrack-Arnett Gold Project include:
- Mineralization at
Haidee remains open in all directions providing the opportunity to
expand the existing heap leach Mineral Resource, increase the mine
life and mine throughput, and improve overall project
economics.
- Potential exists to
identify near-surface, higher grade mineral resources on the Arnett
Property, primarily in Roman’s Trench area.
- Ore from Haidee
does not appear to be sensitive to crush size in the range of crush
sizes tested. Therefore, coarser crushing and run-of-mine leaching
may be possible without appreciable changes in recovery.
- Potential to
increase the level of automation, electrification, and emerging
mining and processing technologies, such as ore sorting, in all
areas of the Project.
- Potential to
develop a second phase mill operation to process known mill Mineral
Resources and numerous related exploration expansion opportunities
(Joss, South Pit, Wards Gulch and elsewhere).
Key risks identified by the Study Authors for
the Beartrack-Arnett first phase heap leach restart project
include:
- Risks associated
with potential mine development include sensitivity to gold price
and permit delays.
- The project
considers refurbishing and reusing much of the existing recovery
plant and infrastructure. There is a risk that the refurbishment
costs would exceed budgeted estimates.
- The Beartrack site
is serviced by an existing Idaho Power Co. 69 kV power transmission
line with limited excess capacity and with power available on a
first come, first served basis.
- To account for the
long leach tail observed during historical Beartrack operations,
the metallurgical recovery calculated from column leach testing was
increased by 2.3% of contained gold (approximately 11,000 ounces of
gold in total) for Beartrack oxide and transition ores. Although
the data supports this assumption, there is a risk that this added
recovery may not be realized or may be delayed relative to the
economic model assumptions.
Responsible Mine Development
The historical Beartrack Mine site was
developed, operated, and continues to be managed in a responsible
way. Revival Gold benefits from the Beartrack standard and plans to
reinforce that legacy by developing the Project in a manner
consistent with today’s more stringent best practice standards.
Examples of this commitment from the PFS include:
- Refurbishing and
reusing the appreciable existing site infrastructure, including the
ADR and water treatment plants, while introducing instrumentation
and automation upgrades that improve efficiency, safety, and
reliability;
- Utilizing low
carbon emissions grid hydro power;
- Developing mine and
site infrastructure plans that avoid new stream and riparian area
disturbances and crossing, and, to the maximum possible extent,
staying within existing historical project disturbance areas;
- Developing
reclamation and closure plans that adopt successful historical
reclamation practices and improves-upon post-closure water
management and treatment practices, including incorporating
membrane cover systems into waste rock storage facility designs;
and,
- Prioritizing hiring
locally, building an internal team, and contracting with external
consultants, contractors and suppliers, that are Lemhi County and
Idaho-based, and when those resources are unavailable, looking to
neighboring States to bolster the project team.
Recommended Next Steps
The Study Authors have recommended additional
work to increase the level of detail, improve the PFS economics,
and de-risk aspects of the project. These recommendations
include:
- Additional heap
leach metallurgical test work to verify recoveries and reagent
requirements at Beartrack and assess the potential for run-of-mine
leach at Haidee.
- Additional
hydrogeologic characterization to refine the current estimates on
the site-wide water balance and pit lake modeling.
- Additional
environmental geochemistry characterization to support operational
waste management planning and closure design.
- The current
environmental baseline study program should be maintained to
prepare for permitting and NEPA review of the first phase heap
leach restart project.
- The development of
a Plan of Operations in support of permitting the heap leach
restart project.
- A feasibility study
should be completed on the heap leach restart project once
supporting lab and field studies referenced above have been
sufficiently advanced.
- A scoping level
economic assessment should be completed for mining and processing
sulphide material in a potential second phase mill operation.
- Ongoing exploration
for open pit oxide mineralization at Arnett. The deposit at Haidee
is open in all directions with several other promising untested
near-surface oxide drill targets near the Haidee haul road and
Beartrack ADR plant.
- Further sulphide
exploration on the open +5 km Beartrack trend and a scoping level
assessment for processing sulphide material.
Estimated costs for select discretionary and
core recommendations are provided in Table 9.
Table 9: Estimated Costs for Select Study
Author Recommendations
Recommendations |
Estimated Costs |
Discretionary($ millions) |
Core Items($ millions) |
Heap leach metallurgical testing – crush size optimization |
|
- |
$0.60 |
Haidee haul road study |
|
- |
$0.35 |
Heap leach geotechnical characterization of ore and liner
assembly |
|
- |
$0.03 |
Hydrogeological studies |
|
- |
$3.20 |
Geochemical characterization studies |
|
- |
$0.30 |
Open pit geotechnical studies |
|
- |
$0.20 |
Remaining permitting baseline data collection & studies |
|
- |
$6.50 |
Plan of Operations |
|
- |
$0.30 |
Phase 1 Heap Leach Restart Project feasibility study |
|
- |
$1.00 |
Phase 2 Mill Project scoping level economic study |
$0.30 |
|
- |
Mineral resource expansion core drilling (±12,000 m) |
$6.60 |
|
- |
Grassroots exploration core (±5,000 m) and RC (±6,000 m)
drilling |
$3.40 |
|
- |
Totals |
$10.30 |
$12.48 |
Figure 5 presents a preliminary proposed project
schedule that spans from completion of the PFS through construction
and commissioning.
Figure 5: Preliminary Proposed
Project Schedule
A photo accompanying this announcement is available at
https://www.globenewswire.com/NewsRoom/AttachmentNg/9c538312-9b75-434f-810a-484b1a16a8d2
Qualified Persons
The following professional engineers were the
Qualified Persons (“QPs”) for the Mineral Resource estimate,
Mineral Reserve estimate, and PFS as defined by NI 43-101:
- Caleb Cook, P.E.,
Technical Director, Processing and Economics; KCA
- John Marek, P.E.,
RM SME, Mineral Resource and Reserve Estimates, Mining; IMC
- David Cameron,
P.E., Environmental, Reclamation & Closure Plan; KC Harvey
- Dr. Haiming (Peter)
Yuan, P.E., Geotechnical; WSP
Mr. Cook visited the site on 16 and 17 of
October 2022 to meet with project personnel and review general site
conditions, especially the area of the heap leach pad and
processing facilities.
Mr. Marek visited the site on August 3-4,
2022.
Mr. Cameron visited the site on May 11, 2021,
inspected all areas of the site, reviewed site conditions, and
collected reports on historical operations. KC Harvey personnel
under Mr. Cameron’s direct supervision attended that site
inspection and subsequently completed environmental monitoring and
field work on the site through 2021 and 2022.
Dr. Yuan visited the site on June 14, 2021. The
focus of Dr. Yuan’s site visit was to assess geotechnical
conditions of major civil works including locations of waste rock
facilities, heap leach pads, and potential borrow sources.
There is no affiliation between Mr. Cook, Mr.
Marek, Mr. Cameron, Dr. Yuan, and Revival except that of an
independent consultant / client relationship and each author is
independent of Revival Gold as described in Section 1.5 of NI
43-101.
John P.W. Meyer, Vice President Engineering and
Development, P.Eng., and Steven T. Priesmeyer, C.P.G., Vice
President Exploration, are the Company’s designated QPs for this
news release within the meaning of NI 43-101 and have reviewed and
approved its scientific and technical content. Mr. Priesmeyer’s
review focused on the geological representativity of the Mineral
Resource numerical models, including review of the laboratory and
field data that support the models, while Mr. Meyer’s review
focused on mine, process and infrastructure designs, capital and
operating costs, and financial modeling.
The Company will file a technical report
summarizing the Mineral Resource and PFS on www.revival-gold.com
and on SEDAR at www.sedar.com in accordance with N43-101 within 45
days.
About Revival Gold
Revival Gold is a growth-focused gold
exploration and development company. The Company is advancing the
Beartrack-Arnett Gold Project located in Idaho, USA.
Beartrack-Arnett is the largest past-producing
gold mine in Idaho. The project benefits from extensive existing
infrastructure and is the subject of a recent Preliminary
Feasibility Study for the potential restart of open pit heap leach
gold production operations.
Since reassembling the Beartrack-Arnett land
position in 2017, Revival Gold has made one of the largest new
discoveries of gold in the United States in the past decade. The
mineralized trend at Beartrack extends for over five kilometers and
is open on strike and at depth. Mineralization at Arnett is open in
all directions.
Additional disclosure including the Company’s
financial statements, technical reports, news releases and other
information can be obtained at www.revival-gold.comor on SEDAR at
www.sedar.com.
For further information, please contact Hugh
Agro, President & CEO or Melisa Armand, Investor Relations.
Telephone (416) 366-4100 or email info@revival-gold.com.
Cautionary Statement
Neither the TSX Venture Exchange nor its
Regulation Services Provider (as that term is defined in the
policies of the TSX Venture Exchange) accepts responsibility for
the adequacy or accuracy of this news release.
This news release includes certain
"forward-looking information" within the meaning of Canadian
securities legislation and “forward-looking statements” within the
meaning of U.S. securities legislation (collectively
“forward-looking statements”. Forward-looking statements are not
comprised of historical facts. Forward-looking statements include
estimates and statements that describe the Company’s future plans,
objectives or goals, including words to the effect that the Company
or management expects a stated condition or result to occur.
Forward-looking statements may be identified by such terms as
“believes”, “anticipates”, “expects”, “estimates”, “may”, “could”,
“would”, “will”, or “plan”. Since forward-looking statements are
based on assumptions and address future events and conditions, by
their very nature they involve inherent risks and uncertainties.
Although these statements are based on information currently
available to the Company, the Company provides no assurance that
actual results will meet management’s expectations. Risks,
uncertainties, and other factors involved with forward-looking
statements could cause actual events, results, performance,
prospects, and opportunities to differ materially from those
expressed or implied by such forward-looking statements.
Forward-looking statements in this news release include, but are
not limited to, the Company’s objectives, goals and future plans,
and statements of intent, the implications of exploration results,
mineral resource/reserve estimates and the economic analysis
thereof, exploration and mine development plans, timing of the
commencement of operations, estimates of market conditions, and
statements regarding the results of the pre-feasibility study,
including the anticipated capital and operating costs, sustaining
costs, net present value, internal rate of return, payback period,
process capacity, average annual metal production, average process
recoveries, concession renewal, permitting of the project,
anticipated mining and processing methods, proposed pre-feasibility
study production schedule and metal production profile, anticipated
construction period, anticipated mine life, expected recoveries and
grades, anticipated production rates, infrastructure, social and
environmental impact studies, availability of labour, tax rates and
commodity prices that would support development of the Project.
Factors that could cause actual results to differ materially from
such forward-looking statements include, but are not limited to
failure to identify mineral resources, failure to convert estimated
mineral resources to reserves, the inability to maintain the
modelling and assumptions upon which the interpretation of results
are based after further testing, the inability to complete a
feasibility study which recommends a production decision, the
preliminary nature of metallurgical test results, delays in
obtaining or failures to obtain required governmental,
environmental or other project approvals, changes in regulatory
requirements, political and social risks, uncertainties relating to
the availability and costs of financing needed in the future,
uncertainties or challenges related to mineral title in the
Company’s projects, changes in equity markets, inflation, changes
in exchange rates, fluctuations in commodity and in particular gold
prices, delays in the development of projects, capital, operating
and reclamation costs varying significantly from estimates, the
continued availability of capital, accidents and labour disputes,
and the other risks involved in the mineral exploration and
development industry, an inability to raise additional funding, the
manner the Company uses its cash or the proceeds of an offering of
the Company’s securities, an inability to predict and counteract
the effects of COVID-19 on the business of the Company, including
but not limited to the effects of COVID-19 on the price of
commodities, capital market conditions, restriction on labour and
international travel and supply chains, future climatic conditions,
the discovery of new, large, low-cost mineral deposits, the general
level of global economic activity, disasters or environmental or
climatic events which affect the infrastructure on which the
project is dependent, and those risks set out in the Company’s
public documents filed on SEDAR. Although the Company believes that
the assumptions and factors used in preparing the forward-looking
statements in this news release are reasonable, undue reliance
should not be placed on such information, which only applies as of
the date of this news release, and no assurance can be given that
such events will occur in the disclosed time frames or at all. The
Company disclaims any intention or obligation to update or revise
any forward-looking statements, whether as a result of new
information, future events or otherwise, other than as required by
law.
______________________1 Estimates based on a
gold price of $1,900 per ounce. See Tables 1 and 2 for additional
assumptions. All figures in this news release are in Metric units
and in $US unless stated otherwise.2 See Revival Gold’s May 16th,
2022, news release and NI 43-101 Technical Report by Wood plc dated
July 13th, 2022.3 Proven and Probable Mineral Reserves were
estimated at a gold price of $1,700 per ounce.
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