Critical Resources

Assay Results Extend Swell Zone at Mavis Lake – Starting from Surface and Extending over 1km in Strike

Lithium exploration and project developer Critical Resources Limited (ASX:CRR) (“Critical Resources” or “the Company”) is pleased to report further outstanding assay results from the Mavis Lake Lithium Project in Ontario, Canada.


Highlights

  • Latest assay results from recent drilling at Mavis Lake have demonstrated continuity with previous, thick high-grade intercepts.
  • The high-grade mineralisation within the Swell Zone starts from surface and extends over 1 kilometer in strike from east to west.
  • Standout new assay results include:
    • Drill-hole MF23-226 with a Swell Zone intercept of 31.55m @ 1.06% Li2O from 205.6m down-hole, and an additional ‘Lower Zone’ high-grade intercept of 20.7m @ 1.44% Li2O from at 339.3m down-hole.
    • Multiple intercepts in drill-hole MF23-228, including:
      • 16.8m @ 1.18% Li2O from 177.05m down-hole,
      • 12.85m @ 1.39% Li2O from 208.1m down-hole, and
      • 14.85m @ 1.25% Li2O from 333.25m down-hole.
  • Multiple Project development workstreams continue including baseline environmental studies, metallurgical test work, mining studies and project economic analysis.
  • Results pending from Main Zone drilling at Mavis Lake and drill-target generation field work at the Project’s northern prospects.

The latest assays have confirmed and extended the recently discovered Swell Zone and, when integrated with previous drilling results, show a thick, high-grade mineralised structure, starting from surface and extending over 1km in strike, sitting oblique to the current Mineral Resource Estimate (MRE).

1km Strike Length of Swell Zone

Recent drilling has established an important connection between previous drilling results, validating the Swell Zone discovery and demonstrating substantial Resource upside.

Current assays confirm a significant, 1km strike of high-grade mineralisation, starting at surface (refer to Figure 2) in the east and plunging gently to the west. Significant assays are shown in Table 1 and full exploration results are provided in Appendix 1.

The results confirm substantial thicknesses of high-grade lithium spodumene mineralisation. Importantly, when incorporating historical drilling the Company has now achieved tight drill spacing (approximately 50m spacing). The thickness and continuity of the Swell Zone, commencing from surface, is expected to contribute to positive future mining economics.

Much of the Swell Zone mineralisation sits outside the current Inferred MRE for Mavis Lake and presents as an immediate opportunity for immediate Resource growth.

Figure 1: Plan view illustrating the collar location of released assay results and section locations.

Lower Zone Identified

Drill Holes MF23-226, MF23-227, MF23-228 and MF23-229 have all continued to intersect a “Lower Zone” of high-grade mineralisation, with a standout intercept of MF23-226 of 20.7 metres at 1.44% Li2O.

This Lower Zone was not identified in the Maiden Mineral Resource Estimate and presents as another immediate opportunity for Resource growth.

The Lower Zone can be seen in context relative to the Mavis Lake Main Zone intercepts in Figure 3.


Click here for the full ASX Release

This article includes content from Critical Resources, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.

CRR:AU
The Conversation (0)
Critical Resources

Critical Resources

High-grade Lithium Portfolio, in a Tier 1 Location, Aligned with the World’s Green Energy Transition

High-grade Lithium Portfolio, in a Tier 1 Location, Aligned with the World’s Green Energy Transition Keep Reading...
Green bar graph of rising stocks line and battery symbol with text: "5 Top Canadian Mining Stocks This Week."

Top 5 Canadian Mining Stocks This Week: Highland Critical Minerals Soars 400 Percent

Welcome to the Investing News Network's weekly look at the best-performing Canadian mining stocks on the TSX, TSXV and CSE, starting with a round-up of Canadian news impacting the resource sector.On Friday (May 8), Statistics Canada released April’s Labour Force Survey. The data showed that... Keep Reading...
Businessmen shaking hands.

POSCO Finalizes US$765 Million Deal for Stake in MinRes' Lithium Mines

South Korean steel and battery materials conglomerate POSCO Holdings (NYSE:PKX,KRX:005490) has finalized a US$765 million agreement with Perth-based Mineral Resources (MinRes) (ASX:MIN,OTCPL:MALRF) to acquire a 30 percent stake in two Australian hard-rock lithium mines.POSCO will take a 30... Keep Reading...
Glowing green digital battery with text overlay reading "5 Top Canadian Mining Stocks This Week."

Top 5 Canadian Mining Stocks This Week: Arctic Fox Lithium Jumps 66 Percent

Welcome to the Investing News Network's weekly look at the best-performing Canadian mining stocks on the TSX, TSXV and CSE, starting with a round-up of Canadian news impacting the resource sector.Statistics Canada released March consumer price index data on Monday (April 20). The data shows a... Keep Reading...
Colorful lithium spodumene mineral rocks glowing fluorescent pink and purple, with text reading: "5 Top Australian Mining Stocks This Week."

Top 5 Australian Mining Stocks This Week: Solis Minerals Charges on Brazil Lithium Acquisition

Welcome to the Investing News Network's weekly round-up of the top-performing mining stocks listed on the ASX, starting with news in Australia's resource sector.This week’s list highlights companies across a range of commodities, including lithium, phosphate and gold. The top gainer made a... Keep Reading...
Michael Phelan.

Bridging AI, Energy Storage and Aging Infrastructure

As global energy grids struggle to keep pace with rising demand from data centers and renewable integration, energy optimization firm GridBeyond is positioning software and artificial intelligence (AI) as a key part of the solution.The company develops platforms designed to orchestrate... Keep Reading...
Text saying "lithium" overlaid on stock chart with a globe in the background.

9 Best-performing Global Lithium Stocks of 2026

Lithium prices have staged a dramatic comeback following a prolonged price slump between early 2023 and late 2025, providing support for global lithium stocks in 2026. Spot battery-grade lithium carbonate prices surged roughly 95 percent between early December 2025 and late January of this year,... Keep Reading...

Interactive Chart

Latest Press Releases

Related News