# Study nearly doubles value, lifts resource for Aclara’s Penco rare earths project Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/study-nearly-doubles-value-lifts-resource-for-aclara-s-penco-rare-earths-project--b0d68406-ab21-4395-a50e-d1e456d23489 Original source: https://www.northernminer.com/news/study-nearly-doubles-value-lifts-resource-for-aclaras-penco-rare-earths-project/1003895866/ Publisher: northernminer Original announcement: 2026-10-19T16:25:51.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-19T16:47:07.060Z Atlas analysis updated: 2026-10-19T16:47:07.060Z - Company: Aclara Resources - Ticker: ARA - Exchange: Unavailable - Region: Chile - Primary commodity: Rare earths - Secondary commodities: Dysprosium, Terbium, Yttrium, Gadolinium - Document categories: Resource update, Other - Extracted: 2026-10-19 16:47:07 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Aclara Resources has released an updated Preliminary Economic Assessment \(PEA\) for its Penco rare earths project in Chile, which nearly doubles the project's NPV to $344 million. The update includes a larger mineral resource of 35.8 million tonnes of measured and indicated material and a 19% increase in contained rare earths. Reasoning: The updated PEA shows significant value appreciation and resource growth for the Penco project, despite higher capital requirements. - Positive factor: Significant increase in NPV to $344 million - Positive factor: Contained metal growth of 19% in M&I resource - Positive factor: Resource category expansion/growth in both M&I and Inferred - Positive factor: Improved IRR to 26.1% - Positive factor: Final environmental approval received in June - Negative factor: Initial capital costs doubled compared to 2021 study Facts used in scoring: 2 ## Classification and evidence **Tonnage Growth** Polarity: positive Definition: Significant tonnage increase \(≥15%\) vs prior estimate with grade maintained or improved. Why it applies: M&I resource tonnage increased significantly as part of the updated PEA. Evidence · text > raises life for the open pit mine by three years to 17 years **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 rare earths in the M&I resource increased by 19%. Evidence · text > a 19% rise in contained rare earths ## Extracted facts Stored fact records: 2. Some facts used in scoring do not have a stored record. ## Resource Estimates (2) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/study-nearly-doubles-value-lifts-resource-for-aclara-s-penco-rare-earths-project--b0d68406-ab21-4395-a50e-d1e456d23489#fact-resource-facts-0) Penco · rare\_earths #### Identity - Project: Penco - Commodity: rare\_earths - Region: chile - Reported Region: Chile - Ticker: ARA #### Resource scope - Estimate type: resource - Resource group id: resource:464a6a8e20ea37763875 - Deposit or zone: Penco Module - Mining method: open\_pit - Material type: ionic clays - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 35800000 - Grade: 2095 - Grade Unit: ppm - Contained Metal: 75025 - Contained Unit: tonnes treo #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-19T00:00:00.000Z Reasoning: Strong growth in both tonnage and contained metal for the M&I category. - Positive factor: 19% rise in contained rare earths Evidence · text > updated resource of 35.8 million measured and indicated tonnes grading 2,095 parts per million \(ppm\) total rare earth oxides \(TREO\) for 75,025 contained tonnes TREO #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ### inferred [Link to this fact](https://atlas-staging.minestarters.com/news/study-nearly-doubles-value-lifts-resource-for-aclara-s-penco-rare-earths-project--b0d68406-ab21-4395-a50e-d1e456d23489#fact-resource-facts-1) Penco · rare\_earths #### Identity - Project: Penco - Commodity: rare\_earths - Region: chile - Reported Region: Chile - Ticker: ARA #### Resource scope - Estimate type: resource - Resource group id: resource:719d0f3434018ca2d09e - Deposit or zone: Penco Module - Mining method: open\_pit - Material type: ionic clays - Resource basis: gross #### Resource Data - Category: inferred - Tonnes: 2200000 - Grade: 1768 - Grade Unit: ppm - Contained Metal: 3848 - Contained Unit: t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2026-10-19T00:00:00.000Z Reasoning: Inferred resource shows healthy growth in contained metal. - Positive factor: 14% rise in contained rare earths Evidence · text > Inferred resources grew 29% to 2.2 million tonnes at 1,768 ppm TREO for 3,848 contained tonnes #### 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 **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: the release names the study this estimate supports **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: the release names the study this estimate supports ## 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.