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United States
Palmer Project

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 Location:
56 km NW from Haines, Alaska, United States

  Project Contacts:
Suite 910 – 510 Burrard Street
Vancouver
British Columbia, Canada
V6C 3A8
Phone  ...  Subscription required
Fax604-608-5372
WebsiteWeb
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  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeUnderground
Commodities
  • Copper
  • Zinc
  • Silver
  • Gold
  • Barite
Mining Method
  • Longhole stoping
  • Transverse stoping
  • Longitudinal stoping
  • Paste backfill
Mine Life11 years (as of Jan 1, 2022)


Owners

Source:
CompanyInterestOwnership
American Pacific Mining Corp. (operator) 41.08 % Indirect
Dowa Metals & Mining Co., Ltd. 58.92 % Indirect
The Project is operated in a joint venture partnership between American Pacific Mining, through its wholly owned subsidiary, Constantine North Inc. as the manager (operator), with 41.08% ownership and Dowa Metals & Mining Co., Ltd (Dowa), with 58.92% ownership.

Contractors

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Deposit Type

  • VMS


Summary:

The Project hosts two known VMS deposits, the Palmer deposit, which consists of the South Wall and RW Zones, and the newly discovered AG Zone deposit, located three km to the southwest (At the South Wall and RW Zones, six mineralization styles have been identified and are grouped according to dominant mineral assemblages and texture and include: Barite mineralization (Zn-rich), Massive Pyrite Mineralization (Cu-rich), Semi-massive and Stringer-style Mineralization, Massive Pyrrhotite Mineralization, Carbonate Mineralization and Barite-Carbonate Mineralization. At the AG Zone deposit, mineralization consists of Massive and Semi-massive sulfide and barite, and feeder-style stringers and replacement. Four alteration facies are associated with the known mineralized zones and include: Quartz-Pyrite, Muscovite, CarbonateChlorite and Epidote.

The South Wall Zones (SWZI, SWZII-III, SWEMZ) are located on the south-facing, steeply dipping limb of megascopic, deposit-scale anticline, disrupted by recognized thrust faulting, normal faulting and strike-slip faulting. The RW Zones (RW East, RW West, RW Oxide) are located on the north-facing, gently dipping upper limb of the same anticline. The RW Oxide Zone is the near surface equivalent of the RW East Zone where sulfide minerals of massive barite-sulfide mineralization have been oxidized and leached, depleting the zone of copper and zinc and enriching the silver and gold grades. The AG Zone deposit (including the AG Main Lens ........


Mining Methods

  • Longhole stoping
  • Transverse stoping
  • Longitudinal stoping
  • Paste backfill


Summary:

Mining of the Palmer Project will be conducted using underground mining methods. The potential mine will be accessed using the 680 Exploration Portal which will connect with the Palmer deposit at 845 masl. This ramp will serve as a personnel and material entry point to the mine, the haulage route from the AG Zone deposit to the Palmer deposit, and the primary fresh air source. The transportation of mineralized material from the mine to the mill will take place in the 510 Conveyor Drift.

The Palmer Project hosts two deposits; the Palmer deposit and the AG Zone deposit. The Palmer deposit is segregated into three zones; Lower Zone 2-3, Zone 2-3, and Zone 1. All production levels are referenced to the drift elevation in regard to elevation in metres above sea level (masl). The Lower Zone 2-3 extends from the 848 Level to 628 Level. Zone 2-3 extends from 848 Level to 1128 Level. Zone 1 extends from 1130 to 1330 Level. The AG Zone deposit extends from the 1000 Level to the 1280 Level. Mining of both the Palmer deposit and AG Zone deposit will occur in 20 m vertical increments, and will be connected by a primary spiral ramp, sized at 5.0 m W x 6.0 m H and located in the footwall of the deposit.

Longhole stoping was selected for both zones of the Palmer deposit as the principal mining method. In the planned LH stopes, a top and bottom drift delineates the stope and blast holes are drilled between the two sub-levels via a LH drilling machine. The blast holes a ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsLOM
Copper Payable metal M lbs 188
Copper Metal in concentrate M lbs 210
Copper Concentrate kt 363
Zinc Payable metal M lbs  ......  Subscription required
Zinc Metal in concentrate M lbs  ......  Subscription required
Zinc Concentrate kt  ......  Subscription required
Silver Payable metal koz  ......  Subscription required
Silver Metal in concentrate koz  ......  Subscription required
Gold Payable metal koz  ......  Subscription required
Gold Metal in concentrate koz  ......  Subscription required
Barite Concentrate kt  ......  Subscription required

Operational Metrics:

Metrics
Daily milling rate  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Tonnes milled, LOM  ......  Subscription required
Annual milling capacity  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at September 27, 2018:
Palmer Deposit Mineral Resource Estimate at a $75/t NSR Cut-off.

CategoryTonnage CommodityGradeContained Metal
Indicated 4,677 kt Copper 1.49 % 154 M lbs
Indicated 4,677 kt Zinc 5.23 % 539 M lbs
Indicated 4,677 kt Silver 30.8 g/t 4.6 M oz
Indicated 4,677 kt Gold 0.3 g/t 45.1 koz
Indicated 4,677 kt Barite 23.9 % 1,118 kt
Indicated 4,677 kt Zinc Equivalent 9.9 % 1,166 M lbs
Indicated 4,677 kt Copper Equivalent 3.26 % 383 M lbs
Inferred 5,338 kt Copper 0.96 % 113 M lbs
Inferred 5,338 kt Zinc 5.2 % 612 M lbs
Inferred 5,338 kt Silver 29.2 g/t 5 M oz
Inferred 5,338 kt Gold 0.28 g/t 48.1 koz
Inferred 5,338 kt Barite 22 % 1,174 kt
Inferred 5,338 kt Zinc Equivalent 11.67 % 1,203 M lbs
Inferred 5,338 kt Copper Equivalent 3.84 % 396 M lbs

Commodity Production Costs:

CommodityUnitsAverage
All-in sustaining costs (AISC) Zinc USD  ......  Subscription required *†
Assumed price Barite USD  ......  Subscription required&nbs
Assumed price Zinc USD  ......  Subscription required&nbs
Assumed price Copper USD  ......  Subscription required&nbs
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
UG mining costs ($/t mined) USD 29.1 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
Total CapEx $M USD  ......  Subscription required
UG OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 210
G&A costs $M USD 103.3
Total OpEx $M USD  ......  Subscription required
Total Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Net Operating Income (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 7% $M USD  ......  Subscription required
After-tax NPV @ 7% $M USD  ......  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 March 7, 2022:
HME TypeSizeQuantity
Bolter ....................... Subscription required
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....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jun 3, 2019
....................... Subscription required ....................... Subscription required Subscription required Jun 3, 2019
....................... Subscription required ....................... Subscription required Subscription required Feb 6, 2023
....................... Subscription required ....................... Subscription required Subscription required Feb 6, 2023
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2019

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
Preliminary Economic Assessment 2022
................................... Subscription required 2019
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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