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Canada
Lawyer Project

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 Location:
95 km W from Fort Ware, British Columbia, Canada

  Project Contacts:
10545 – 45 Avenue NW 250 Southridge, Suite 300
Edmonton
Alberta, Canada
T6H 4M9
Phone  ...  Subscription required
Fax1-780-439-7308
EmailEmail
WebsiteWeb
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  • Overview
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  • Mining
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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Gold
  • Silver
Mining Method
  • Truck & Shovel / Loader
Mine Life12 years (as of Jan 1, 2022)
The PEA for Lawyer presents a solid open-pit mining operation with a base case scenario, attractive economics that have the potential to produce additional gold and silver ounces and improved economics through facility design adjustments.


Owners

Source: p. 28,58
CompanyInterestOwnership
Benchmark Metals Inc. 100 % Indirect
Mineral claims Lawyer are 100% owned by Benchmark Metals Inc., either directly or through its ownership of PPM Phoenix Precious Metals Corp.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Porphyry
  • Skarn
  • Epithermal
  • Breccia pipe / Stockwork
  • Vein / narrow vein


Summary:

At the centre of the Lawyers Trend are the structurally controlled. Cliff Creek, Dukes Ridge, Phoenix, and AGB zones are located within a large 5 km by 8 km radiometric anomaly that is coincident with potassic alteration and associated with a low-sulphidation epithermal system.

The Cliff Creek, Dukes Ridge-Phoenix and AGB zones are all considered to be structurally controlled, low-sulphidation type epithermal gold-silver deposits. Evidence for a number of different mineral deposit styles occur in the Lawyers Property region, including low- and high-sulphidation epithermal gold-silver mineralisation, calc-alkalic porphyry copper-gold mineralisation, and uncommon iron or copper (± gold and silver) skarn mineralisation.

Volcanic strata on the Property are only very weakly altered and original textures generally well preserved. Narrow localized zones associated with mineralisation in the main zones show intense silicification and potassic alteration. A variety of alteration facies are observed across the Property, ranging from a massive advanced argillic zone north-west of Cliff Creek to the strong quartz-sericite-pyrite alteration concentrated along structures in the Marmot area. The alteration, variation and zonation suggest that the epithermal mineralisation on the Lawyers Property was part of a large-scale hydrothermal system.

The Lawyers Zones consist of a combination of quartz veins, stockwork zones and chalcedony breccia bodies developed al ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

For this PEA, conventional, open pit mining was selected as the preferred mining method due to its relative low cost and high productivity, as well as the proximity to surface of the mineralised material. The open pit was selected from a series of optimized pit shells for each deposit. Each of the selected shells were then divided into pushbacks to help optimize the production schedule.

Over the life of mine the deposits are able to produce approximately 47 Mt of resources at a grade of 1.46 g/t AuEq and an overall strip ratio of 6:1. Mining activities will average 70 kt/d with a peak of 110 kt/d over a 12-year life of mine, in order to meet a Mill processing rate of 10,600 t/d (3.9 Mt/a).

The open pit mining activities for the Project are expected to be undertaken by an owner-operated truck/shovel fleet with conventional drill, blast, load and haul operations. Bulk excavation will be performed using hydraulic excavators with back-up units of either hydraulic excavators or a front-end loader. Given the overall scale of operations and equipment requirements, a diesel-powered fleet has been selected.

The open pits will provide mill feed to a crusher at a rate of 10,600 t/d (3.9 Mt/a). It is expected that some mill feed material will be stockpiled close to the crusher and rehandled as required. Waste material will be hauled either to the Tailings Management Facility (TMF) as part of the containment structure, to the Waste Rock Storage Facility ( ........


Crushing and Grinding
Source: Subscription required

- subscription is required.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Gold Payable metal koz 1361,634
Gold Metal in doré koz 1361,636
Silver Payable metal koz  ......  Subscription required  ......  Subscription required
Silver Metal in doré koz  ......  Subscription required  ......  Subscription required
Gold Equivalent Payable metal koz  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily mining rate  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Daily processing rate  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing capacity  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at June 11, 2022:
Total Mineral Resource Estimate 0.4 g/t Au-Eq Cut-off Pit-Constrained & 1.5 g/t AuEq Cut-off Out-of-Pit.

CategoryTonnage CommodityGradeContained Metal
Measured 20,304 kt Gold 1.21 g/t 787 koz
Measured 20,304 kt Silver 30.5 g/t 19.9 M oz
Measured 20,304 kt Gold Equivalent 1.88 g/t 1,036 koz
Indicated 47,071 kt Gold 1.15 g/t 1,734 koz
Indicated 47,071 kt Silver 19.6 g/t 29.6 M oz
Indicated 47,071 kt Gold Equivalent 1.39 g/t 2,105 koz
Measured & Indicated 67,376 kt Gold 1.16 g/t 2,521 koz
Measured & Indicated 67,376 kt Silver 22.9 g/t 49.6 M oz
Measured & Indicated 67,376 kt Gold Equivalent 1.45 g/t 3,141 koz
Inferred 4,873 kt Gold 2.2 g/t 345 koz
Inferred 4,873 kt Silver 36.1 g/t 5.7 M oz
Inferred 4,873 kt Gold Equivalent 2.65 g/t 415 koz

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Gold USD  ......  Subscription required *†
Assumed price Silver USD  ......  Subscription required&nbs
Assumed price Gold USD  ......  Subscription required&nbs
* According to 2022 study / presentation.
† Net of By-Product.
Subscription required - Subscription is required.

Operating Costs:

Units2022
OP mining costs ($/t mined) CAD 3.68 *
OP mining costs ($/t milled) CAD  ......  Subscription required
Processing costs ($/t milled) CAD  ......  Subscription required
G&A ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $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 807.9
Refining costs $M USD  ......  Subscription required
G&A costs $M CAD 240.2
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 USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
Net revenue (LOM) $M USD  ......  Subscription required
Net Operating 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 @ 10% $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 10% $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.

Water Supply

Water for use in mill processing will be sourced from a combination of reclaim from the TMF (via a floating pump barge), reclaim within the mill circuit from the thickeners, and a freshwater component (sourced from dewatering of the open pits or the historic underground workings).

The reclaim water system from the TMF consists of two vertical turbine pumps (one operating, one standby) positioned on two floating barges, two floating HDPE pipelines that merge into one overland HDPE pipeline, and four centrifugal booster pumps (two operating, two standby). The system is designed with a series of drain points and air release valves for safe operation.

The reclaim system is designed to meet 95% of the total process water requirement, year-round, assuming a 5% freshwater demand. The system uses a single vertical turbine pump mounted on a flotation barge, with 100% installed standby pump capacity. The barge pumps require VFDs to manage the variable head demand due to the fluctuating pond levels during the life of mine. Two booster station pumps, with 100% installed standby capacity, will operate concurrently in series, providing the necessary additional total dynamic head (TDH) to deliver the process water to the Mill.


Proposed Heavy Mobile Equipment as of September 30, 2022:
HME TypeSizeQuantityLeased or
Contractor
Dozer (crawler) 600 HP ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Feb 8, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 30, 2022
....................... Subscription required ....................... Subscription required Subscription required Sep 30, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Preliminary Economic Assessment 2022
Press Release 2022
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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