# Omai Gold Mines Files NI 43-101 Technical Report Supporting a Preliminary Economic Assessment Indicating After-Tax NPV5% of $4.0 Billion at a $3,600/oz Gold Price for its Omai Gold Project Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/omai-gold-mines-files-ni-43-101-technical-report-supporting-a-preliminary-econom--e548770d-fa7f-4830-93cb-03541b6f6edf Original source: https://www.juniorminingnetwork.com/junior-miner-news/press-releases/541-tsx-venture/omg/212309-omai-gold-files-ni-43-101-technical-report-supporting-a-preliminary-economic-assessment-indicating-after-tax-npv5-of-4-0-billion-at-a-3-600-oz-gold-price-for-its-omai-gold-project.html Publisher: jmn Original announcement: 2026-10-05T00:38:21.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-10-05T14:32:05.819Z Atlas analysis updated: 2026-10-05T14:32:05.819Z - Company: Omai Gold Mines Corp. - Ticker: OMG - Exchange: TSXV - Region: Guyana - Primary commodity: Gold - Secondary commodities: None reported - Document categories: Other, Resource update - Extracted: 2026-10-05 14:32:06 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Omai Gold Mines has filed a NI 43-101 technical report supporting a Preliminary Economic Assessment \(PEA\) for its Omai Gold Project in Guyana. The PEA indicates an after-tax NPV5% of $4.0 billion and an 18-year mine life with 6.3 million ounces of gold production. Reasoning: The filing of a NI 43-101 technical report supporting a high-value PEA for a large-scale gold project is a major project development milestone. - Positive factor: Strong NPV5% of $4.0 billion at $3,600/oz gold - Positive factor: High IRR of 24% at base case - Positive factor: Significant LOM gold production of 6.3 million ounces - Positive factor: Large Indicated resource of 2.5 Moz Au - Negative factor: PEA is preliminary and includes significant Inferred resources Facts used in scoring: 2 ## Classification and evidence **PEA-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Preliminary Economic Assessment — early-stage study. Why it applies: The technical report supports a Preliminary Economic Assessment \(PEA\) for the Omai Gold Project. Evidence · text > in support of the Preliminary Economic Assessment \("PEA"\) announced on August 19, 2026 **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The technical report was prepared in accordance with NI 43-101 standards. Evidence · text > National Instrument 43-101 Technical Report dated October 2nd, 2026 ## 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/omai-gold-mines-files-ni-43-101-technical-report-supporting-a-preliminary-econom--e548770d-fa7f-4830-93cb-03541b6f6edf#fact-resource-facts-0) Omai Gold Project · gold Historical result Needs review: historical\_restatement #### Identity - Project: Omai Gold Project - Commodity: gold - Region: guyana - Reported Region: Guyana - Ticker: OMG #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: David M. Robson, Goran Andric, Jeff Sepp, Linda Dufour, Stephan Theben, Alan J. San Martin, Elaine Ellingham - Resource group id: resource:91cdf1b78298f98b5305 - Deposit or zone: Omai Gold Project - Resource basis: attributable #### Resource Data - Category: indicated - Tonnes: 38100000 - Grade: 2.04 - Grade Unit: g/t - Contained Metal: 2.5 - Contained Unit: moz #### Prior Estimate - Resource Date: 2026-04-14 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-04-14T00:00:00.000Z #### Dates - Event date: 2026-10-05T00:00:00.000Z Reasoning: This is a restatement of the April 14, 2026 resource estimate used as the basis for the PEA. - Positive factor: Solid Indicated grade of 2.04 g/t Evidence · text > 2.5 million ounces of gold \("Au"\) projected life-of-mine \("LOM"\) payable production over 18 years... This PEA is based on a Mineral Resource Estimate of 2.5 million ounces Indicated averaging 2.04 g/t Au in 38.1 million tonnes #### 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 **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **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/omai-gold-mines-files-ni-43-101-technical-report-supporting-a-preliminary-econom--e548770d-fa7f-4830-93cb-03541b6f6edf#fact-resource-facts-1) Omai Gold Project · gold Historical result Needs review: historical\_restatement #### Identity - Project: Omai Gold Project - Commodity: gold - Region: guyana - Reported Region: Guyana - Ticker: OMG #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - QP Signed: Yes - Qualified person names: David M. Robson, Goran Andric, Jeff Sepp, Linda Dufour, Stephan Theben, Alan J. San Martin, Elaine Ellingham - Resource group id: resource:7e00ced5a8eaac19db9a - Deposit or zone: Omai Gold Project - Resource basis: attributable #### Resource Data - Category: inferred - Tonnes: 106600000 - Grade: 1.59 - Grade Unit: g/t - Contained Metal: 5.5 - Contained Unit: moz #### Prior Estimate - Resource Date: 2026-04-14 #### Review - Needs Review: Yes - Review Reason: historical\_restatement - Historical: Yes - Historical Source Date: 2026-04-14T00:00:00.000Z #### Dates - Event date: 2026-10-05T00:00:00.000Z Reasoning: Restatement of the April 14, 2026 resource estimate. - Positive factor: Large scale inferred resource - Negative factor: Inferred category implies higher geological risk Evidence · text > 5.5 million ounces of gold \("Au"\) projected life-of-mine \("LOM"\) payable production over 18 years... 5.5 million ounces Inferred averaging 1.59 g/t Au in 106.6 million 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 **QP/CP Signed** Polarity: positive Definition: Qualified Person \(QP\) or Competent Person \(CP\) named and signed off — a member of a recognized professional association \(e.g., AusIMM, SME, AIG, P.Geo\) with relevant experience. Why it applies: qp\_signed is true **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: reporting\_standards includes ni\_43\_101 **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.