A maiden resource at the high grade Root Project is on track for the first quarter of 2023, after Green Technology Metals pulled its highest grades to date from the Ontario lithium prospect.

Green Technology Metals (ASX:GT1) described the drill success at Root’s McCombe deposit in Canada as “exceptional” after striking an interval of 4.06% Li2O from 64.6m at McCombe, where 31 holes have been drilled to date.

It ratchets up Root’s position within GT1’s portfolio, located just 200km west of its flagship 9.9Mt at 1.04% Li2O Seymour deposit.

Grades, crystal size and crystal mass in recent drilling correlates well with an historic down dip drill hole in 2016 which struck 67m at a high 1.75% Li2O.

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GT1 has hit a number of high grade spodumene intersections at McCombe. Pic: GT1

Assays for the most recent five holes returned have delivered similar high tenor mineralisation, including:

  • RL-22-0013: 8.0m at 1.72% Li2O from 64.0m (incl. 2.0m at 4.06% Li2O from 64.6m)
  • RL-22-0014: 8.4m at 1.32% Li2O from 102.0m (incl. 1.0m at 3.91% Li2O from 103.6m)
  • RL-22-0015: 13.4m at 1.24% Li2O from 28.9m (incl. 1.0m at 3.16% Li2O from 29.3m); and,
  • RL-22-0016A: 6.3m at 1.52% Li2O from 66.3m (incl. 1.0m at 2.38% Li2O from 70.7m).

“Recent assay returns have confirmed that McCombe is higher grade than originally interpreted based on historical data,” GT1 CEO Luke Cox said, noting that it could form a structure over several kilometres with the Morrison pegmatite.

“The Root Project as a whole is also developing into a much larger complex, with McCombe potentially joining with Morrison to form a structure over several kilometres long, and recent spodumene discoveries at Root Bay confirming it extends east and west along a magnetic high.”

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A mineral resource is on track for Q1 2023. Pic: GT1

More discoveries

They include a grab sample from a new outcrop discovery at the Root Bay prospect 10km from McCombe, where there is no historic drilling and spodumene occurrences were mapped by GT1 over 300m from a 2016 channel sample, which assayed 2.39% Li2O.

Drilling is planned over the next 12 months to target both Root Bay and the Morrison LCT pegmatites 1km east of McCombe, last explored by Consolidated Morrison Explorations in the late 1950s. The outcrop there is about 200m long and tested by trenching, but historical drilling proved its strike was at least 1.6km long.

Of the holes drilled to date phase 1 resource definition drilling at Root has been completed, with assays for 8 of the 22 holes still to be returned.

Assays are also pending for nine holes completed in extensional drilling, where strong visual spodumene has been logged in pegmatite intercepts.

Numerous pegmatites have been identified at the McCombe deposit since drilling began there in 1950.

But the recent programs from GT1 have shown it to be simpler than previously thought, with a single major pegmatite averaging 10m in thickness (and up to 19m), striking east-west with a shallow dip 30 degrees to the south.

A second pegmatite is striking northeast with a similar thickness.

Every hole has struck spodumene bearing LCT (lithium-caesium-tantalum) pegmatite so far, with two drill rigs running around the clock and a maiden resource on track for early next year.




This article was developed in collaboration with Green Technology Metals, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.