• Field exploration underway at Castor for lithium-bearing pegmatites
  • Project sits on Yasinski Lake Greenstone belt, home to high grade lithium deposits
  • A total of 228 pegmatite occurrences have been identified
  • CDC consultancy will undertake a two-phase exploration program


Summit Minerals has started field exploration for lithium-bearing pegmatites at its Castor project in the prolific James Bay region of Quebec.

The company owns 80% of the project, which covers over 125km2 within the northern portion of the Yasinski Lake Greenstone Belt and 33km of contact between the greenstone belt and intrusive rocks.

Notably, throughout the region, spodumene-bearing pegmatites lie on such contacts, and previous pegmatite showings identified at Castor have not been tested for spodumene or lithium.

The Yasinksi Lake greenstone belt is also home to projects like Q2 Metals’ (TSX- V:QTWO) Mia lithium project, which recorded 18 grab samples averaging 2.65% with results of up to 4.37% Li20, and Ophir Gold’s (TSX-V:OPHR) Radis lithium project, which hosts rock chips up to 2.33% Li20. 

Summit Minerals (ASX:SUM) has partnered with highly regarded lithium-focused geological consultancy Critical Discoveries Corporation (CDC), who will manage the exploration program.


228 pegmatites flagged at Castor

A total of 228 interpreted pegmatite occurrences have been identified within Castor from satellite imagery. The CDC team have commenced active field reconnaissance across the southern and central targets, particularly those with ready access near the James Bay Road and powerlines.

“Following recent delays due to wildfires and subsequent workforce shortages in the region, we are very excited to finally get on the ground at Castor and begin our field exploration program,” SUM exploration manager Jonathan King said.

“Over the last few months, we have been working diligently to refine our targets for this program, giving us the best chance of exploration success.”


Two phase exploration program

CDC will split work into two phases, with the exploration team basing itself out of the town of Radisson.

Phase One is a ground reconnaissance phase investigating interpreted pegmatite targets with ready access to the James Bay Road and powerlines that traverse the project.

Phase Two will be a reconnaissance heliborne program to navigate the less accessible targets.



This article was developed in collaboration with Summit Minerals, 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.