# Canterra grows Newfoundland copper-zinc resource 55% as grades fall Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b Original source: https://www.northernminer.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall/1003895475/ Publisher: northernminer Original announcement: 2026-10-06T14:48:59.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-06T16:52:10.999Z Atlas analysis updated: 2026-10-06T16:52:10.999Z - Company: Canterra Minerals - Ticker: CTM - Exchange: Unavailable - Region: Newfoundland - Primary commodity: Copper - Secondary commodities: Zinc, Lead, Silver, Gold - Document categories: Resource update, Other - Extracted: 2026-10-06 16:52:11 UTC Narrative sentiment: 0.40 · Bullish ## Minestarters Atlas summary Canterra Minerals has updated the Lundberg copper-zinc resource at its Buchans project, increasing the indicated tonnage by 55% to 26.1 million tonnes. While average grades for copper, zinc, lead, silver, and gold have declined, the contained metal for all commodities has increased due to higher metal price assumptions in the optimized pit shell. Reasoning: The resource update shows substantial tonnage and contained metal growth driven by higher metal prices and optimized pit shells, despite a decline in average grades. - Positive factor: Significant tonnage growth \(55%\) - Positive factor: Increased contained metal across all major commodities - Positive factor: Improved resource confidence with 97% Indicated category - Positive factor: Higher metal price assumptions used in optimization - Negative factor: Grade decline across all reported commodities Facts used in scoring: 10 ## Classification and evidence **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: Indicated resource tonnage increased by 55% compared to the previous estimate. Evidence · text > increased the indicated resource at its Lundberg copper-zinc deposit in Newfoundland by 55% **Grade Decline** Polarity: negative Definition: Average grade dropped >5% vs prior estimate — deposit economics worsening. May indicate high-grading in early drilling. Why it applies: Average grades for copper, zinc, lead, silver, and gold all declined compared to the previous estimate. Evidence · text > even as grades declined **Contained Metal Growth** Polarity: positive Definition: True scale improvement — contained metal ounces/tonnes increased vs prior, accounting for both tonnage and grade changes. Why it applies: Contained copper, zinc, lead, silver, and gold all increased despite the grade decline. Evidence · text > contained copper rose 34% to 94,800 tonnes ## Extracted facts Stored fact records: 10. Some facts used in scoring do not have a stored record. ## Resource Estimates (10) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-0) Lundberg · copper #### Identity - Project: Lundberg - Commodity: copper - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:1540c459c60c190005e1 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 26100000 - Grade: 0.36 - Grade Unit: % - Contained Metal: 94800 - Contained Unit: t #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Indicated copper tonnage grew significantly despite grade decline. - Positive factor: 34% increase in contained copper - Negative factor: 14% grade decline Evidence · text > 26.1 million indicated tonnes grading 0.36% copper #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-1) Lundberg · zinc #### Identity - Project: Lundberg - Commodity: zinc - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:1540c459c60c190005e1 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 26100000 - Grade: 1.31 - Grade Unit: % - Contained Metal: 341600 - Contained Unit: t #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Indicated zinc tonnage grew significantly despite grade decline. - Positive factor: 33% increase in contained zinc - Negative factor: 14% grade decline Evidence · text > 1.31% zinc #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-2) Lundberg · lead #### Identity - Project: Lundberg - Commodity: lead - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:1540c459c60c190005e1 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 26100000 - Grade: 0.56 - Grade Unit: % - Contained Metal: 146200 - Contained Unit: t #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Indicated lead tonnage grew significantly despite grade decline. - Positive factor: 36% increase in contained lead - Negative factor: 13% grade decline Evidence · text > 0.56% lead #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-3) Lundberg · silver #### Identity - Project: Lundberg - Commodity: silver - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:1540c459c60c190005e1 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 26100000 - Grade: 5.02 - Grade Unit: grams per tonne - Contained Metal: 4.2 - Contained Unit: million oz. #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Indicated silver tonnage grew significantly despite grade decline. - Positive factor: 37% increase in contained silver - Negative factor: 12% grade decline Evidence · text > 5.02 grams silver per tonne #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-4) Lundberg · gold #### Identity - Project: Lundberg - Commodity: gold - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:1540c459c60c190005e1 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: indicated - Tonnes: 26100000 - Grade: 0.06 - Grade Unit: gram - Contained Metal: 51400 - Contained Unit: oz. #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Indicated gold tonnage grew significantly despite grade decline. - Positive factor: 36% increase in contained gold - Negative factor: 14% grade decline Evidence · text > 0.06 gram gold #### Tags used in scoring **Indicated Resource** Polarity: positive Definition: Reasonable geological confidence based on adequate drilling; continuity can be assumed. Basis for Probable Reserves. Why it applies: category is "indicated" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-5) Lundberg · copper #### Identity - Project: Lundberg - Commodity: copper - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:0168eec6dd67260487f6 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 870000 - Grade: 0.48 - Grade Unit: % - Contained Metal: 4200 - Contained Unit: t #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Inferred resource component for Lundberg. Evidence · text > 870,000 inferred tonnes grading 0.48% copper #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-6) Lundberg · zinc #### Identity - Project: Lundberg - Commodity: zinc - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:0168eec6dd67260487f6 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 870000 - Grade: 2.21 - Grade Unit: % - Contained Metal: 19200 - Contained Unit: t #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Inferred resource component for Lundberg. Evidence · text > 2.21% zinc #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-7) Lundberg · lead #### Identity - Project: Lundberg - Commodity: lead - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:0168eec6dd67260487f6 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 870000 - Grade: 1.13 - Grade Unit: % - Contained Metal: 9900 - Contained Unit: t #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Inferred resource component for Lundberg. Evidence · text > 1.13% lead #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-8) Lundberg · silver #### Identity - Project: Lundberg - Commodity: silver - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:0168eec6dd67260487f6 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 870000 - Grade: 20.87 - Grade Unit: grams silver per tonne - Contained Metal: 580000 - Contained Unit: oz. silver #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Inferred resource component for Lundberg. Evidence · text > 20.87 grams silver #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/canterra-grows-newfoundland-copper-zinc-resource-55-as-grades-fall--cbd0d7da-f6d8-47f3-8517-53498b44c53b#fact-resource-facts-9) Lundberg · gold #### Identity - Project: Lundberg - Commodity: gold - Region: canada\_nl - Reported Region: Newfoundland - Ticker: CTM #### Resource scope - Estimate type: resource - Resource group id: resource:0168eec6dd67260487f6 - Deposit or zone: Lundberg - Mining method: open\_pit #### Resource Data - Category: inferred - Tonnes: 870000 - Grade: 0.28 - Grade Unit: gram - Contained Metal: 7800 - Contained Unit: oz. gold #### Metal Equivalent - Assumptions Disclosed: Yes #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-06T00:00:00.000Z Reasoning: Inferred resource component for Lundberg. Evidence · text > 0.28 gram gold #### Tags used in scoring **Inferred Resource** Polarity: negative Definition: Speculative category — limited drilling, geological continuity assumed but not confirmed. Cannot support economic studies alone. Why it applies: category is "inferred" **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated **No QP/CP Disclosure** Polarity: negative Definition: No Qualified Person or Competent Person named — lower credibility for the estimate. A QP/CP should be a member of a recognized professional association with relevant experience. Why it applies: no Qualified or Competent Person is named anywhere in the release **Resource Update** Polarity: neutral Definition: Revised estimate for an existing resource — compare to prior to assess progress. Why it applies: the release compares against a previous estimate ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.