# Smackover Lithium Files Definitive Feasibility Study for Its South West Arkansas Project, North America's Highest-Grade Reported Lithium Brine Reserve Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--eaeb588f-186e-481e-ac9c-fe55c1d33cbb Original source: https://money.tmx.com/en/quote/SLI/news/8155281186822757/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas Publisher: tmx Original announcement: 2025-10-14T12:30:44.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Standard Lithium Ltd. - Ticker: SLI - Exchange: TSX - Region: Arkansas - Primary commodity: Lithium - Secondary commodities: None reported - Document categories: Resource update, Production - Extracted: 2026-08-24 10:53:38 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Smackover Lithium has filed a Definitive Feasibility Study \(DFS\) for its South West Arkansas project, reporting 447,000 tonnes of lithium carbonate equivalent \(LCE\) in Proven Reserves. The project targets a production capacity of 22,500 tonnes of battery-quality lithium carbonate per annum with a 20.2% unlevered pre-tax IRR. Reasoning: The filing of a DFS for a major lithium project with significant reserves and a strong IRR is a major de-risking milestone for the company. - Positive factor: Definitive Feasibility Study \(DFS\) completed - Positive factor: High-grade lithium brine reserves reported - Positive factor: Strong IRR of 20.2% - Positive factor: First commercial DLE operation in the US - Negative factor: High capital expenditure requirement of $1.45 billion Facts used in scoring: 3 ## Classification and evidence **DFS-Supporting** Polarity: neutral Definition: Resource estimate prepared to support a Definitive Feasibility Study — requires high M&I confidence. Why it applies: The announcement is the filing of a Definitive Feasibility Study. Evidence · text > announced today that the Definitive Feasibility Study \("DFS" or the "Report"\) for its South West Arkansas \("SWA"\) project **Proven Reserve** Polarity: positive Definition: Measured Resource with demonstrated economic viability after applying modifying factors. Why it applies: The DFS reports 447,000 tonnes of LCE as Proven Reserves. Evidence · text > producing 447,000 tonnes \(Proven Reserves\) of lithium carbonate equivalent \("LCE"\) **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: The release states the technical disclosure was reviewed and approved by a Qualified Person, Mr. Stephen Ross, P.Geo. Evidence · text > All scientific and technical disclosure in this news release was reviewed and approved by Mr. Stephen Ross, P.Geo., ... and a Qualified Person ## Extracted facts Stored fact records: 3. Some facts used in scoring do not have a stored record. ## Resource Estimates (3) ### proven [Link to this fact](https://atlas-staging.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--eaeb588f-186e-481e-ac9c-fe55c1d33cbb#fact-resource-facts-0) lithium #### Identity - Commodity: lithium - Ticker: SLI #### Resource Data - Category: proven - Tonnes: 447000 - Grade Unit: t - Contained Metal: 447000 - Contained Unit: t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-14T00:00:00.000Z Reasoning: Significant proven reserve reported in a DFS. - Positive factor: Proven reserve status Evidence · text > producing 447,000 tonnes \(Proven Reserves\) of lithium carbonate equivalent \("LCE"\) ### indicated [Link to this fact](https://atlas-staging.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--eaeb588f-186e-481e-ac9c-fe55c1d33cbb#fact-resource-facts-1) lithium #### Identity - Commodity: lithium - Ticker: SLI #### Resource Data - Category: indicated - Tonnes: 1177000 - Grade Unit: t - Contained Metal: 1177000 - Contained Unit: t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-14T00:00:00.000Z Reasoning: Large indicated resource component reported as part of the M&I total. - Positive factor: Large M&I resource base Evidence · text > 38% of the in-situ Measured and Indicated Resources of 1,177,000 tonnes LCE ### measured [Link to this fact](https://atlas-staging.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--eaeb588f-186e-481e-ac9c-fe55c1d33cbb#fact-resource-facts-2) lithium #### Identity - Commodity: lithium - Ticker: SLI #### Resource Data - Category: measured - Tonnes: 1177000 - Grade Unit: t - Contained Metal: 1177000 - Contained Unit: t #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-14T00:00:00.000Z Reasoning: Measured resource component reported as part of the M&I total. - Positive factor: High confidence resource category Evidence · text > 38% of the in-situ Measured and Indicated Resources of 1,177,000 tonnes LCE ## 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.