Root Lake Lithium Project

The Root Lake Lithium Project (option exercised to acquire 100%) is located in Ontario, Canada. 

Historic Results

The project comprises 1,013 Ha of mining claims and has over 10,000m of historic drilling. 

Mineralisation is hosted in extensive outcropping spodumene-bearing pegmatite structures with widths up to 19m and grades of up to 5.10% Li2O.  In addition, tantalum grades of up to 380 ppm were intersected.

Due Diligence Review

Assay results from the limited maiden due diligence drilling program conducted at Root Lake have validated the historical results, confirming the quality and continuity of the lithium mineralisation at the McCombe pegmatite with grades up to 3.8%  Li2O obtained and also as seen from the metallurgical drill hole RL-16-06, which was drilled down dip for 70 continuous metres of mineralisation, with an average grade of 1.7% Li2O. These results support the potential for the Root Lake Project to host multiple high quality spodumene structures.

Considerable historical exploration for lithium was undertaken in 1956 at the McCombe pegmatite, which is located on two dikes and has been traced at surface for a strike length of approximately 550m.

Capital Lithium Mines Ltd. completed a diamond drilling programme at the McCombe pegmatite on the Root Lake property in 1956, consisting of 55 drill holes for 10,442m. Capital Lithium Mines Ltd. outlined a 2,333,752 tonne deposit (NB: Not JORC or NI 43-101 compliant) with a grade of 1.3% Li2O. This non-compliant deposit at the McCombe pegmatite covers less than 5% of the whole Project area.

The McCombe pegmatite structure is hosted in a vertically stacked series of dipping pegmatite sills. The best exposed part of these pegmatite dikes, situated toward the west end, has been mapped historically. Dike 1 is the largest and is intermittently exposed for a strike length of 176m and maximum width of 15m. Dike 2 is lens-shaped in plan and measures 19m by 87m.

Drill collar map for the historic and current drilling completed at the McCombe pegmatite. Also highlighted are the outcropping pegmatites structures and potential extensions of the mineralisation zones

As a result of the due diligence review, Ardiden is pleased to confirm that multiple drill-ready targets have now been identified on the McCombe and Root Lake pegmatite structures at the Root Lake Lithium Project  which have the potential to significantly expand the lithium mineralisation in the area.

These drill targets have been identified by the Company after reviewing the current and historical drilling results, mapping, exploration and resource reports which defined a number untested anomalous zones in and around both known lithium occurrences, including the McCombe pegmatite (known strike length of 550m) and the Root Lake pegmatite (known strike length of 1,200m.

The review has confirmed that the majority of the exploration has previously been focused on the McCombe prospect, and only limited and incomplete exploration has been undertaken across the rest of the project area, including the Root Lake prospect. 

The review has also highlighted that the lithium-bearing pegmatite structures at the McCombe and Root Lake prospects, and elsewhere on the project, are yet to be fully defined and remain open in multiple directions.

Ardiden has now identified multiple new drill-ready targets areas along both the McCombe and Root Lake prospects which will provide Ardiden with the opportunity to expand the known zones of lithium mineralization at these locations.

The Root Lake prospect is encouraging with a known strike length of 1,200m and remains open both to the east and west. The historical drilling completed in 1956 confirmed and intersected a pegmatite structure at depth (~25-30m below surface), verifying the presence of spodumene with grades of up to 2.62% Li2O being reported.

Overall map showing the location of the McCombe and Root Lake pegmatites on the Root Lake lithium project. Highlighted are the outcropping pegmatites structures, current and historic trenches and drilling and the potential extensions of the mineralisation zones.

In 2009/2010, Golden Dory completed a trenching and sampling program on the outcropping zones of the pegmatite structure, which is located approximately 75m to 100m north of the historical drilling locations. Golden Dory reported grades of up 4.43% Li2O being obtained from those trench samples.

These historical high grade intersections of Li2O at the Root Lake prospect are consistent with the high grades identified at the McCombe prospect and provide Ardiden with greater confidence in the project to host multiple high grade spodumene structures.

The Company will now undertake an exploration program which is due to commence shortly, to confirm if the pegmatite intersected at the Root Lake prospect in the historical drilling is in fact the same pegmatite structure that is outcropping to the north and was tested by Golden Dory.

1955 Historical Trench Sampling of the Pegmatite at Root Lake

The next phase of exploration for Ardiden at the Root Lake Project prior to undertaking further drilling is likely to include a further analysis of the current and historical data in conjunction with a detailed geological and structural mapping program, in order to develop a better understanding of the pegmatites and the influence of the surrounding structures and to obtain a better understanding of the relationship and potential connection between the McCombe and Root Lake pegmatites.

Ardiden considers the early intersection of significant zones of spodumene-pegmatite mineralisation close to surface at Root Lake to be very positive outcome of the drilling program, while the identification of additional and extensions of the pegmatites structures reaffirms the high potential of this project area to host a JORC Compliant lithium resource.

Root Bay Lithium Project

The Company owns 100% of the Root Bay lithium project.

The Root Bay lithium project is accessible via local logging roads north of Sioux Lookout and is located approximately 300km north-west of the regional centre of Thunder Bay. The project is strategically located approximately 5km to the east of the recently acquired Root Lake Lithium Project and consists of three claim areas, totalling 720 hectares.

The project was staked by Ardiden as part of its regional exploration focus in and around the Root Bay spodumene-bearing pegmatite structure located in Claim 4282605. The outcropping Root Bay spodumene-bearing pegmatite structure was accidently discovered by a representative of the Ontario Ministry of Northern Development and Mines (“MNDM”) in 2011. 

The newly discovered pegmatite is exposed on the eastern side of a logging road along the prominent ridge that follows the presumed trace of the Lake St. Joseph Fault. The exposed pegmatite is described as hosted by locally pillowed, mafic metavolcanic rocks.

Initial observations by the MDNM states the dyke is characterized by coarse white albite, grey quartz and pale grey-green spodumene crystals up to 10cm long. The outcrop distribution of the pegmatite indicates that the spodumene dyke is perhaps 10m wide at this location along the limited, exposed contact of approximately 60m.


Photo of the Root Bay pegmatite exposure

Reconnaissance Exploration and Sampling Program

Ardiden completed an initial reconnaissance exploration and sampling program at the greenfields Root Bay Lithium Project in August 2016.

Root Lake Lithium Project Claims Area and location of McCombe Pegmaitite, Root Lake Pegmatite and Root Bay Pegmatite

Ardiden’s geological team cut a 15m channel across the surface of the outcropping pegmatite, collecting 15 samples which were each 1 metre long. The channel samples were logged and sent to Actlabs laboratory in Thunder Bay for analysis under QAQC procedures.

Logging and analysis from the maiden sampling program has confirmed the strong presence of spodumene with lithium mineralisation identified in all of the channel samples and outstanding grades of up 2.54% Li2O returned.

Example of Spodumene crystal in the Root Bay pegmatite exposure

Ardiden considers these initial exploration results to be very encouraging, particularly the presence of a continuous 13m long lithium mineralisation zone across the surface of the primary pegmatite exposure, averaging 1.77% Li2O.

This initial limited mapping and sampling program provided information about the geological and structural formations and confirmed the orientation of the pegmatite exposure as North-South striking.

The next phase of exploration will target the strike and dip continuity of the primary pegmatite structure and allow additional local pegmatite exposures to be mapped and sampled.