# 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-extractions.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--574a7ac6-d783-4eab-846b-c227f6d366a0 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, Economic study - Extracted: 2026-09-16 23:02:17 UTC Narrative sentiment: 0.80 · Bullish ## Minestarters Atlas summary Standard Lithium has filed a Definitive Feasibility Study \(DFS\) for its South West Arkansas lithium brine project. The study outlines a 20-year mine life with 447,000 tonnes of LCE in Proven Reserves and a projected 20.2% unlevered pre-tax IRR. Reasoning: The announcement of a DFS for a high-grade lithium project with a solid 20.2% IRR and significant reserves is a major de-risking milestone for the company. - Positive factor: Definitive Feasibility Study \(DFS\) filed - 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: Qualified Person is not independent Facts used in scoring: 3 ## Classification and evidence **DFS Complete** Polarity: positive Story-specific tag Definition: No canonical definition is currently available. Why it applies: The company has filed a Definitive Feasibility Study for the South West Arkansas project. Evidence · text > announced today that the Definitive Feasibility Study \(“DFS” or the “Report”\) for its South West Arkansas \(“SWA”\) project \(the “Project” or “SWA Project”\) has been filed. **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 Proven Reserves of LCE. Evidence · text > producing 447,000 tonnes \(Proven Reserves\) of lithium carbonate equivalent \(“LCE”\) **NI 43-101 Compliant** Polarity: positive Definition: Resource estimate prepared in compliance with NI 43-101 \(Canada\) — high reporting standard. Why it applies: The disclosure is reviewed and approved by a Qualified Person under NI 43-101 standards. Evidence · text > reviewed and approved by Mr. Stephen Ross, P.Geo... for purposes of, and as that term is defined in, National Instrument 43-101 ## 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-extractions.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--574a7ac6-d783-4eab-846b-c227f6d366a0#fact-resource-facts-1) South West Arkansas · lithium #### Identity - Project: South West Arkansas - Commodity: lithium - Region: arkansas - Reported Region: Arkansas - Ticker: SLI #### Resource scope - Estimate type: resource - Reporting standards: ni\_43\_101 - Resource group id: resource:58eb2edbf6f0577655d5 - Resource basis: gross #### Resource Data - Category: indicated - Tonnes: 1177000 - Contained Metal: 1177000 - Contained Unit: tonnes lce #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-14T00:00:00.000Z Reasoning: The resource scale is substantial for a lithium brine project. - Positive factor: Significant M&I resource Evidence · text > 38% of the in-situ Measured and Indicated Resources of 1,177,000 tonnes LCE. #### 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 **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 **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 ### proven [Link to this fact](https://atlas-extractions.minestarters.com/news/smackover-lithium-files-definitive-feasibility-study-for-its-south-west-arkansas--574a7ac6-d783-4eab-846b-c227f6d366a0#fact-resource-facts-2) South West Arkansas · lithium #### Identity - Project: South West Arkansas - Commodity: lithium - Region: arkansas - Reported Region: Arkansas - Ticker: SLI #### Resource scope - Estimate type: reserve - Reporting standards: ni\_43\_101 - Resource group id: resource:9547e8afe71141344ecb - Resource basis: gross #### Resource Data - Category: proven - Tonnes: 447000 - Contained Metal: 447000 - Contained Unit: tonnes lce #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2025-10-14T00:00:00.000Z Reasoning: The reserve grade is high for the region. - Positive factor: High grade brine Evidence · text > producing 447,000 tonnes \(Proven Reserves\) of lithium carbonate equivalent \(“LCE”\) #### Tags used in scoring **Proven Reserve** Polarity: positive Definition: Measured Resource with demonstrated economic viability after applying modifying factors. Why it applies: category is "proven" **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 **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 **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.