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Canada
Nash Creek Project

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 Location:
44 km NW from Bathurst, New Brunswick, Canada

  Project Contacts:
1555 – 555 West Hastings Street
Vancouver
British Columbia, Canada
V6B 4N6
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  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Zinc
  • Lead
  • Silver
Mining Method
  • Truck & Shovel / Loader
Processing
  • Flotation
  • Dense media separation
Mine Life10 years (as of Jan 1, 2018)
The Project includes the Nash Creek mineral deposit located approximately 50 km by road northwest of the town of Bathurst, NB and the Superjack mineral deposit located approximately 45 km by road southwest of Bathurst, NB.
Latest NewsCallinex Discovers 28.6m of 57 g/t Ag Including 16.5m of 94 g/t Ag Near Surface at the Nash Creek Project in Bathurst Mining District, New Brunswick     June 15, 2020


Owners

Source: p. 14
CompanyInterestOwnership
Callinex Mines Inc. 100 % Indirect
The Nash Creek and Superjack Properties which comprise the Project, are 100% owned by Callinex.

Deposit Type

  • VMS
  • Breccia pipe / Stockwork
  • Stratabound (SMS)
  • Vein / narrow vein


Summary:

The white smoker deposit model is proposed for the Nash Creek deposit, in contract to a traditional black smoker deposit. These deposits types are described below.

Sulphide mineralization at Nash Creek includes pyrite, sphalerite, galena and minor chalcopyrite. Silver consistently accompanies the sulphides, possibly the result of argentiferous galena or presence of a silver rich sulphosalt. Sulphide concentrations of potential economic interest occur as: 1) stratabound and/or laterally continuous zones of matrix filling or replacement style mineralization within coarse to fine grained pyroclastic deposits of both mafic and felsic affinity; 2) fracture filling, stringer or vein arrays mainly within competent flow units or flow breccia; and 3) discrete breccia zones (e.g., flow breccia, autobrecciation, etc.). Strong intraclast chlorite mineralization is associated with concentrations of zinc and lead in the brecciated mafic rocks.

Moderate to intense clay alteration and silicification are common in the mineralized zones and broader zones of strong carbonate, hematite and potassium alteration occur in footwall, and occasionally hangingwall, to mineralized host rocks. Mineralization occurs as multiple stacked zones of laterally extensive pyroclastic units and flow top rubble zones which are cross cut locally by north, northeast and northwest trending structures that may have acted as pathways for mineralized hydrothermal fluids (Cullen and Barr, 2005).

Four zones hosting stratabound mineralization have been identified on the Nash Creek Property by previous workers. These four zones are, roughly from north to south, the MacMillan, Hickey and Hayes zones and to the east, the Central Zone. Drilling completed by Callinex in 2017 has extended the Hickey Zone to the north.

Mineral resource estimates have been stated for the Hickey and Hayes zones. Walker, 2006 describes the Superjack A Zone as two subparallel, easterly thickening, massive sulphide lenses that strike approximately east-northeast and dip about 80°N. The larger, northern lens has a strike length of approximately 380 m and extends downdip for about 280 m, where intersections of 8.93% Zn over 9.75 m have been reported (McAllister 1960; Mitton 1994). Sulphide intersections in the western end of the deposit are between 0.3 m and 3 m in thickness. Massive sulphides in the deposit are dominated by pyrite but include subordinate pyrrhotite, sphalerite, galena, and chalcopyrite. In the western part of the Superjack A Zone, massive sulphides are immediately overlain by basalt and are underlain by an approximate 20 m thick sericite- or chlorite-altered zone of tuffaceous sedimentary rocks cute by quartz-sulphide veins.

In drill logs, the massive sulphides at the A Zone are described as fine-grained, containing predominantly pyrite with intermittent bands of sphalerite and galena throughout, as well as intermittent disseminated sphalerite and galena throughout. The massive zones occasionally contain quartz-chloritic flooding (<1%). Medium-grained blebby chalcopyrite can frequently be observed at both the upper and lower contacts of the massive zones. The sulphides are locally magnetic due to disseminated pyrrhotite. Stringer sulphides, interpreted as stockwork zones, occur mainly on the footwall, but occasionally on the hanging wall as well; this repeating is likely due to local fold patterns. They are hosted by banded argillite and/or sericite schist. Mineralization at the B and C zones is described very similarly to that in the A Zone. Both contain pyrite-dominated massive sulphides with intermittent sphalerite-galena banding/disseminations. The B Zone contains fewer and thinner stringer sulphide zones than both the A and C zones.


Mining Methods

  • Truck & Shovel / Loader


Summary:

The PEA proposes a conventional truck and shovel open pit mining operation with leased-to-own equipment, to extract the potentially economic Mineral Resources at the Nash Creek and Superjack Properties.

The mine plan for the Nash Creek Property has an approximate ten-year production life with total on-site DMS process plant capacity of approximately 1.4 Mt per year.

Initial mining activities will be carried out at the Superjack Property, located approximately 45 km by road southwest of Bathurst.

P&E examined the Mineral Resource block model developed for the Nash Creek and Superjack Properties and developed a series of optimized incremental pit shells for a selection of various zinc equivalent cut-off grades. The optimization analysis included Indicated and Inferred Mineral Resources. For pit optimization, a base case ZnEq cut-off grade of 1.50% for Nash Creek and 2.00% for Superjack was used along with an inter-ramp pit slope of 50°. The Mineral Resources were compared in terms of the total value potentially produced and the related waste/overburden stripping ratios. Of special interest was the rate of increase (or decrease) of certain factors in these comparable pit shells, as the open pit shells were excavated deeper.

Two large pits (Hickey North and Hayes) and one smaller pit (Hickey South) are expected to be developed at Nash Creek and one small, moderate sized pit at Superjack. The proposed open pits will utilize conventional open pit drilling, blasting, loading and haulage technologies and related equipment. The overburden stripped from each pit area would be separately stockpiled for later use as site reclamation material. The mine waste rock would be stockpiled in designated rock storage areas. After four years of operation, the Hickey South Pit at Nash Creek will be available for tailings disposal. The Hickey South pit is expected to have a mined-out volume of 1.7 M m3. For strategic estimation purposes, this pit is assumed to have solid, low permeability rock walls and any potential contaminated pit water is assumed to be hydrologically isolated from ground water resources. At a settled density of 1.6 t/m3, using 90% of the pit, about 2.4 Mt of tailings will be disposed in the Hickey South Pit. After seven years of operation, the Hayes Pit is expected to be completed and this pit is also assumed to be suitable, without major engineering modifications, for DMS rejects and flotation tailings disposal.

At Superjack, approximately 5.8 Mt of rock will be mined, of which 1.3 Mt will be process plant feed. This material may be partially crushed on and will be transported by 40 t capacity highway haulage trucks to the Nash Creek processing plant. If mining is completed in one year, approximately 100 truckloads per day will transit on public roads from the Superjack Property to the Nash Creek processing facility.

PIT DESIGNS
An operational pit design was created using the selected optimized shell as the basis.

Haulage Road:
- Haul Road Width (double lane) - 25 m;
- Haul Road Width (single lane) - 12 m;
- Haul Road Grade (maximum) - 10%.

Overburden Slope:
- Bench Height - 10 m;
- Bench Face Angle - 35º;
- Catch-bench Width - 7.2 m;
- Inter-ramp Angle - 25º.

Rock Slope
- Bench Height (triple bench) - 20 m;
- Bench Face Angle - 75º;
- Catch-bench Width - 11.4 m;
- Inter-ramp Angle - 50º.


Crushing and Grinding


Processing

  • Flotation
  • Dense media separation

Source: Subscription required

Summary:

The mine plan for the Nash Creek Property has an approximate ten-year production life with total on-site process plant capacity of approximately 1.4 Mt per year.

Conventional three stage crushing will reduce the ‘run-of-mine’ (“ROM”) material to a size that will be suitable for pre-concentration in a DMS plant. The size and design of the DMS facility has not been completed yet and will be subject to the results of future test work on sample ROM material. This study assumes that the lower grade 50% of the process plant feed will be separated and rejected as waste in the DMS facility, with acceptable metal losses.

The resulting DMS concentrate will be reduced in size in a ball mill to a P80 of approximately 70 microns. From there, it will be directed to a rougher-scavenger flotation circuit that will produce a zinc and a lead rougher concentrate. Cleaner flotation circuits will upgrade both concentrates to a marketable grade. The concentrates will subsequently be t ........

Recoveries & Grades:

CommodityParameterAvg. LOM
Zinc Head Grade, % 2.88
Zinc Recovery Rate, % 90
Zinc Concentrate Grade, % 53.8
Lead Head Grade, % 0.62
Lead Recovery Rate, % 80
Lead Concentrate Grade, % 50.3
Silver Recovery Rate, % 25
Silver Head Grade, g/t 20.3

Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Zinc Metal in concentrate M lbs 77768
Zinc Concentrate kt 647
Lead Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required
Lead Concentrate kt  ......  Subscription required
Silver Metal in concentrate M oz  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio 6.7 *
Daily mining rate 29,000 t *
Daily ore mining rate 3,900 t *
Waste tonnes, LOM 92,925 kt *
Ore tonnes mined, LOM 14,427 kt *
Total tonnes mined, LOM 107,352 kt *
Daily processing capacity 3,900 t *
Tonnes processed, LOM 14,427 kt *
Annual processing capacity 1,425,000 t *
* According to 2018 study.

Reserves at March 21, 2018:
A cut-off value of 1.50% ZnEq was used as the base case for reporting Mineral Resources.

CategoryTonnage CommodityGradeContained Metal
Indicated 13,592 kt Zinc 2.68 % 802,056,000 lbs
Indicated 13,592 kt Lead 0.58 % 173,010,000 lbs
Indicated 13,592 kt Silver 17.8 g/t 7,801,000 oz
Indicated 13,592 kt Zinc Equivalent 3.21 % 963,392,000 lbs
Inferred 9,140 kt Zinc 2.68 % 563,360,000 lbs
Inferred 9,140 kt Lead 0.47 % 63,766,272 lbs
Inferred 9,140 kt Silver 13.9 g/t 5,699,000 oz
Inferred 9,140 kt Zinc Equivalent 3.11 % 734,748,000 lbs

Commodity Production Costs:

CommodityUnitsAverage
Total cash costs Zinc CAD 0.3 / lb *†
All-in sustaining costs (AISC) Zinc CAD 0.37 / lb *†
Assumed price Lead USD 1.1 / lb *
Assumed price Zinc USD 1.25 / lb *
Assumed price Silver USD 17 / oz *
* According to 2018 study / presentation.
† Net of By-Product.

Operating Costs:

Units2018
OP mining costs ($/t mined) CAD 2.75 *
OP mining costs ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2018 study.
Subscription required - Subscription is required.

2018 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Closure costs $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Processing OpEx $M CAD 98.1
G&A costs $M CAD 25.8
Total OpEx $M CAD  ......  Subscription required
Mining Taxes $M CAD  ......  Subscription required
Income Taxes $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Royalty payments $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
EBITDA (LOM) $M CAD  ......  Subscription required
Net Income (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 5% $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 8% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Proposed Heavy Mobile Equipment as of June 29, 2018:
HME TypeModelSizeLeased or
Contractor
Bulldozer ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 29, 2018
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Jun 29, 2018
....................... Subscription required ....................... Subscription required ....................... Subscription required Jun 29, 2018
....................... Subscription required ....................... Subscription required Subscription required Dec 20, 2021
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2018

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
Preliminary Economic Assessment 2018
Press Release 2018
Subscription required - Subscription is required.

News:

NewsDate
Callinex Discovers 28.6m of 57 g/t Ag Including 16.5m of 94 g/t Ag Near Surface at the Nash Creek Project in Bathurst Mining District, New Brunswick June 15, 2020
Callinex Discovers Silver, Zinc and Lead at the Nash Creek Project in the Bathurst Mining District, New Brunswick June 4, 2020
Callinex Mines Announces Results of Initial PEA that Generates a 34% IRR and a $230M NPV(8)% at the Nash Creek and Superjack Projects May 15, 2018

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