Canada

Horne 5 Project

Click for more information

Categories

Overview

Mine TypeUnderground
StagePermitting
Commodities
  • Gold
  • Silver
  • Copper
  • Zinc
Mining Method
  • Transverse stoping
  • Longitudinal retreat
  • Longhole stoping
  • Cemented paste backfill
Mine Life15 years (as of Jan 1, 2021)
ShapshotFollowing completion of the relevant field work and studies, Falco has filed the documentation responding to questions raised by the Ministère de l'Environnement et de la Lutte contre les changements climatiques in light of the acceptability analysis of the Corporation’s Environmental impact assessment study

Owners

SourceSource
CompanyInterestOwnership
Falco Resources Ltd. 100 % Direct
Falco owns rights to the minerals located below 200 metres from the surface of Concession 156PTB, where the Horne 5 deposit is located. Falco also owns certain surface rights surrounding the Quemont No. 2 shaft located on Concession 243. Under the agreement, ownership of the Concession 156PTB and Concession 243 remains with the Third Party.

Contractors

Lock

- subscription is required.

Deposit type

  • VMS

Summary:

VMS deposits are also known as volcanic associated, volcanic-hosted, and volcano sedimentaryhosted massive sulphide deposits. They typically occur as lenses of polymetallic massive sulphide that form at or near the seafloor in submarine volcanic environments, and are classified according to base metal content, gold content, or host-rock lithology.

The Horne deposit is the largest Canadian Au rich VMS deposits in the Noranda district (331 tonnes of Au produced historically from 54.3 Mt of ore at 6.1 g/t Au; Kerr and Gibson, 1993).

The typical morphology of Au-rich VMS deposits consists of a lenticular massive sulphide body with associated underlying discordant stockwork-stringer feeders and replacement zones. At Horne, zones of auriferous sulphide veinlets with Fe-chlorite selvages account for some of the Aurich mineralization (Kerr and Mason, 1990), however, the deposit lacks a well-defined stringer zone (Poulsen et al., 2000).

The vertical extent of the stockwork is typically larger than its lateral extent. The lateral extent of the deposit is typically a few hundred metres, but in some cases where the deposits are overturned, the mineralization has more than 2 km of known vertical extent (Horne and LaRonde Penna deposits). The thickness of the massive sulphide lenses is highly variable, especially when subjected to deformation (shortening), but is commonly on the order of a few tens of metres.

Mineralization is typically hosted by felsic volcanic flows and volcaniclastic rocks (or their metamorphosed equivalents) near or at the interface with basaltic andesite, andesite or clastic sedimentary strata. The Horne deposit is contained within a fault-bounded block of tholeiitic rhyolite flows and pyroclastic breccias and tuffs in contact with andesite flows to the east. It is juxtaposed against andesite flows and a diorite intrusion to the south, and rhyolites to the north that contain the Quemont deposit, another auriferous massive sulphide deposit (Poulsen et al., 2000) potentially related to the same giant hydrothermal system responsible for the formation of the Horne deposit.

At the Horne deposit, most rhyolitic rocks within the fault-bounded block have been affected by weak sericitization and silicification that become more intense near the sulphide mineralization, where alteration is characterized by a quartz-sericite-pyrite assemblage (Poulsen et al., 2000). Chlorite alteration, which locally contains elevated Cu and Au values, is largely restricted to the immediate footwall and sidewall of the deposit, except for local discordant zones in the footwall (Barrett et al., 1991).

The Horne Mine orebodies (Upper H, Lower H and Horne 5 deposit) dip subvertically within rhyolitic flows, breccias, and tuffs that are bounded by the Andesite and the Horne Creek faults. Least-altered rhyolites have low K2O contents and other geochemical features that place them within the FII tholeiitic series (Lesher et al., 1986). Graded volcaniclastic beds, metal zoning in the orebodies, and locations of chloritized-mineralized rhyolites indicate that the volcanic sequence youngs to the north. The volcanics in the fault wedge are variably silicified and sericitized, and local zones in the orebody sidewalls and footwall are chloritized.

The H orebodies formed podiform masses up to 120 m wide, 100 m thick, and 300 m in downplunge extent, consisting of chalcopyrite pyrrhotite-pyrite gold ore.

A semi-continuous Cu-rich base (up to 15 m thick) exists above the footwall and adjacent to the sidewalls of the orebodies. The ore changes stratigraphically upwards from a chalcopyrite-rich base, through middle pyrrhotite-pyrite-rich zones, to upper pyrite rich zones. Gold enrichments occur in some of the Cu-rich ores but also in overlying pyritic ores and in adjacent host volcanics. Cu-Au bearing chloritized rhyolites occur mainly in the western and eastern sidewalls and at down plunge terminations of the H orebodies.

The Lower H orebody is stratigraphically overlain by a massive to semi-massive sulphide body, referred to as the Horne 5 deposit (Sinclair, 1971). This tabular zone consists of numerous lenses of massive pyrite interbedded with intensely altered felsic volcaniclastic rocks. The Horne 5 deposit extends for a strike length of more than 1,000 m to a depth of at least 2,650 m and ranges from approximately 30 m to 140 m in thickness (Sinclair, 1971; Fisher, 1974; Gibson et al., 2000).

Pyrite is the predominant sulphide in this zone, but scattered portions contain sphalerite, chalcopyrite, and gold in economic concentrations (Sinclair, 1971). Sphalerite is the second most abundant sulphide in the Horne 5 deposit, although it is virtually absent in the Lower H, but it is far less abundant than pyrite. Chalcopyrite is a common mineral in many parts of the Horne 5 deposit but usually is present in only very minor amounts. Pyrrhotite is even less abundant than chalcopyrite and galena is rare in the Horne 5 deposit. A set of drill-core samples of massive sulphides have been analyzed for Cu, Au, Zn, Ag by Barrett et al., (1991). Based on twenty-five (25) samples (thirteen (13) samples from level 27 and twelve (12) samples from level 49), the Horne 5 deposit contains, on average, 0.12% Cu, 1.8% Zn, 1.4 g/t Au, and 26.6 g/t Ag.

The Horne 5 deposit extends from above level 21 down to below level 65. It attains significant thickness and breadth only below level 23. Below level 23, the Horne 5 deposit ranges from 15 to 125 m thick.

Reserves

Lock

- subscription is required.

Mining Methods

Lock

- subscription is required.

Comminution

Crushers and Mills

Lock

- subscription is required.

Processing

Lock

- subscription is required.

Production

CommodityProductUnitsAvg. AnnualLOM
Gold Payable metal koz 2203,304
Gold Metal in conc./ doré koz 2273,401
Silver Payable metal koz 27,289
Silver Metal in conc./ doré koz 31,762
Copper Payable metal M lbs 229
Copper Metal in concentrate M lbs 247
Zinc Payable metal M lbs 1,005
Zinc Metal in concentrate M lbs 1,190
Gold Equivalent Payable metal oz 340,000

Operational metrics

Metrics
Daily ore mining rate 00000
Daily milling capacity 00000
Ore tonnes mined, LOM 00000
Tonnes milled, LOM 00000
* According to 2021 study.

Production Costs

CommodityUnitsAverage
Credits (by-product) Gold USD 000
Cash costs Gold USD 0000000
All-in sustaining costs (AISC) Gold USD 0000000
All-in costs Gold USD 0000000
Assumed price Zinc USD 000
Assumed price Copper USD 00
Assumed price Silver USD 00
Assumed price Gold USD 0000
* According to 2021 study / presentation.
Net of By-Product.

Operating Costs

Currency2021
UG mining costs ($/t milled) CAD 12.3 *  
Processing costs ($/t milled) CAD  ....  Subscribe
G&A ($/t milled) CAD  ....  Subscribe
Total operating costs ($/t milled) CAD  ....  Subscribe
* According to 2021 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscribe
Sustaining CapEx $M CAD  ......  Subscribe
Closure costs $M CAD  ......  Subscribe
Total CapEx $M CAD  ......  Subscribe
UG OpEx $M CAD  ......  Subscribe
Processing OpEx $M CAD 1,777
G&A costs $M CAD 236.5
Total OpEx $M CAD  ......  Subscribe
Mining Taxes $M CAD  ......  Subscribe
Total Taxes $M CAD  ......  Subscribe
Royalty payments $M CAD  ......  Subscribe
Gross revenue (LOM) $M CAD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscribe
After-tax Cash Flow (LOM) $M CAD  ......  Subscribe
Pre-tax NPV @ 5% $M CAD  ......  Subscribe
After-tax NPV @ 5% $M CAD  ......  Subscribe
Pre-tax IRR, %  ......  Subscribe
After-tax IRR, %  ......  Subscribe
Pre-tax payback period, years  ......  Subscribe
After-tax payback period, years  ......  Subscribe

Heavy Mobile Equipment

Lock

- subscription is required.

Personnel

Mine Management

Source Source
Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 18, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 18, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 18, 2021
....................... Subscription required ....................... Subscription required Subscription required Dec 29, 2023

Total WorkforceYear
Subscription required 2021

Aerial view:

Lock

- subscription is required.