Mining Intelligence and News
United States

Antler Project

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Summary

Mine TypeUnderground
Study CompletedPrefeasibility
Study in ProgressFeasibility
StagePermitting
Commodities
  • Copper
  • Zinc
  • Lead
  • Silver
  • Gold
Mining Method
  • Sub-level open stoping (SLOS)
  • Longitudinal stoping
  • Transverse stoping
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Mine Life... Lock
SnapshotKinterra Capital has completed the acquisition of New World Resources, including full ownership of the Antler Copper Project. The new ownership team announced plans to review and optimize the project’s processing technologies to strengthen domestic copper production in the United States—an indication of forthcoming technical and capital adjustments compared to the 2024 Pre-Feasibility Study.

Antler Copper Project designated a FAST-41 Transparency Project by the U.S. Federal Government, highlighting its strategic role in national critical mineral supply chains, streamlining permitting process.

Approval of the Mined Land Reclamation Plan represents another major permitting milestone for the development of Antler.

In May 2025, New World Resources released an updated JORC Mineral Resource Estimate, reporting a significant increase in total tonnage and overall confidence levels.

Kinterra is expected to consolidate and refine these results in forthcoming technical releases.

Owners

SourceSource
CompanyInterestOwnership
Kinterra Copper USA LLC 100 % Indirect
Kinterra Capital Corp. has assumed full control of the Antler Copper Project following the acquisition of New World Resources Ltd, the project’s former owner. On August 26, 2025, Kinterra completed the compulsory purchase of all remaining New World Resources securities through Kinterra Capital GP Corp. II, acting as general partner of the Kinterra Critical Materials & Infrastructure Opportunities Fund II, LP.

Consequently, New World Resources Limited (‘NWC’) was delisted from the Official List at the close of trading on August 26, 2025, in accordance with Listing Rule 17.14.

Contractors

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Deposit type

  • VMS

Summary:

The Antler Copper Project features Volcanogenic Massive Sulphide (VMS) type mineralization, which is hosted within Proterozoic-aged metasedimentary and meta-volcanic rocks. Within the deposit, sulphides manifest in massive, semi-massive, and disseminated forms and contain valuable metals including copper, zinc, lead, silver, and gold.

Several specific domains host these resources. The Antler Sulphide domain (corresponding to Zone 3) and the B Lode domain (Zone 4) are characterized by copper, zinc, lead, silver, and gold mineralization, with Zone 3 containing semi-massive and massive sulphides which replaced an unconsolidated sub-seafloor mud, unreplaced mudstone, rhyolite, and felsic volcaniclastics, while Zone 4 occurs as replacement mineralization in a stratigraphically younger mud lens, rhyolite, felsic volcaniclastics, and unreplaced mudstone. The Alteration domain (Zone 2) exhibits intense primary hydrothermal alteration within the stratigraphic footwall to the Antler Sulphides; this domain hosts stringer sulphides and significant gold mineralization along with anomalous base metal concentrations within altered mafic to felsic volcaniclastics, dacite, and basalt.

Structurally, the deposit is interpreted as being overturned and it dips at approximately 55 degrees towards the northwest. The local stratigraphy encompassing the deposit consists of an approximately 400-metre thick sequence of metamorphosed seafloor sediments, volcaniclastics, and lavas. This mineralized sequence is bounded by younger plutonic intrusions that are not considered to be prospective: the Cavaliere Granodiorite lies to the west (MRE zone 0), and the Antler Granite is situated to the east (MRE zone 6).

The specific stratigraphic zones, ordered from older to younger, based on the protolith, are detailed as follows:
• Zone 1: Rhyolite, mafic volcaniclastics (Non-resource bearing).
• Zone 2 (Alteration): Intensely altered rocks with stringer sulphides (Resource bearing).
• Zone 3 (Antler Sulphides): Semi-massive/massive sulphides (Resource bearing).
• Zone 4 (B lode): Rhyolite, felsic volcaniclastics, mudstone (Resource bearing).
• Zone 5: Rhyolite, felsic volcaniclastics, mudstone (Non-resource bearing).

Dimensions
The resource extends approximately 730 m along strike, 1,100 m down a 55° dip, and thickness ranges from 1 m to 32 m.

The resource extends from approximately 1,000 m elevation to 0 m elevation above mean sea level.

Reserves

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Mining Methods

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Required Heavy Mobile Equipment

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Comminution

Crushers and Mills

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Processing

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Commodity Production

CommodityProductUnitsAvg. AnnualLOM
Copper Payable metal M lbs 36412
Zinc Payable metal M lbs 76855
Lead Payable metal t 3,60041,100
Silver Payable metal koz 5335,960
Gold Payable metal oz 6,00067,500
Copper Equivalent Payable metal t 30,100341,100
Copper Concentrate kt 59
Zinc Concentrate kt 75
Lead-Silver Concentrate kt 6.4

Operational metrics

Metrics
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Ore tonnes mined, LOM  ....  Subscribe
Total tonnes mined, LOM  ....  Subscribe
Tonnes milled, LOM  ....  Subscribe
* According to 2024 study.

Production Costs

CommodityUnitsAverage
Total cash costs Copper Equivalent USD  ....  Subscribe
Total cash costs Copper USD  ....  Subscribe
All-in sustaining costs (AISC) Copper Equivalent USD  ....  Subscribe
All-in sustaining costs (AISC) Copper USD  ....  Subscribe
Assumed price Lead USD  ....  Subscribe
Assumed price Zinc USD  ....  Subscribe
Assumed price Copper USD  ....  Subscribe
Assumed price Silver USD  ....  Subscribe
Assumed price Gold USD  ....  Subscribe
* According to 2024 study / presentation.
** Net of By-Product.

Operating Costs

CurrencyAverage
UG mining costs ($/t milled) USD  ....  Subscribe
Processing costs ($/t milled) USD  ....  Subscribe
G&A ($/t milled) USD  ....  Subscribe
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* According to 2024 study.

Project Costs

MetricsUnitsLOM Total
Pre-Production capital costs $M USD  ......  Subscribe
Sustaining CapEx $M USD  ......  Subscribe
Closure costs $M USD  ......  Subscribe
Total CapEx $M USD  ......  Subscribe
Freight costs $M USD 183.7
Refining and treatment costs $M USD  ......  Subscribe
Total OpEx $M USD  ......  Subscribe
Total Taxes $M USD  ......  Subscribe
Gross revenue (LOM) $M USD  ......  Subscribe
Net revenue (LOM) $M USD  ......  Subscribe
EBITDA (LOM) $M USD  ......  Subscribe
Pre-tax Cash Flow (LOM) $M USD  ......  Subscribe
After-tax Cash Flow (LOM) $M USD  ......  Subscribe
Pre-tax NPV @ 7% $M USD  ......  Subscribe
After-tax NPV @ 7% $M USD  ......  Subscribe
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Personnel

Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2025
....................... Subscription required ....................... Subscription required Subscription required Oct 27, 2025

Workforce

Total WorkforceYear
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Aerial view:

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