The Little Nahanni Pegmatite Property is in the NWT, adjacent to the Yukon border and
some 39km WNW of the Canada Tungsten mine. The prospect comprises 5,393 ha (53.93 km2) consisting of a system of branching swarms of dykes that extend over 13km exposed strike length and up to 500m width. Individual dykes within these swarms`are mostly 1-10m thickness. Natural exposure and drilling has demonstrated a vertical extent of 300m. Minerals of interest are spodumene, lithium micas, tantalite-columbite and cassiterite. Grades of up to 2% Li2O and 500g/t Ta2O5 are reported for individual dykes. The property has been explored sporadically since 1979. This work included soil and stream sediment geochemistry, chip and channel sampling of cliff faces and 1,798m of diamond drilling. With the current increase in the demand of Li and Ta the property has become a significant prospect. Equitorial Exploration Corp. optioned the claims in 2016 and commenced exploration with a carefully executed channel sampling programme that was performed by Archer Cathro and Associates (1981) Limited (Archer Cathro).
To date no estimate of reserves that would be NI 43-101 compliant has been made. Future work would be best aimed at developing adequate grade data. The 2016 channel sampling is adequate for inclusion in a database of dimensions and grade. Further sampling using accurate surveying and documentation is needed. The property is large enough that many diamond or percussion drill holes will be required to build up a compliant resource. These may best be sited according to results of surface channel sampling. Testing of the mineralization at depth is also an obvious target.
2016 Sampling Program
In 2016 Archer Cathro carried out channel sampling across the various main pegmatite zones on behalf of Equitorial Exploration (Figure 9). Equitorial`s September 6, 2016 news release stated:
“During the 2016 field program, a total of 81 channel samples were cut across dyke swarms in two cirques (3 and 4) on the LNPG property. The samples were cut using a hand-held rock saw. Channel samples are considered the most representative way to test surface exposures and are akin to diamond drill core in size and purpose. Channel samples were collected from the Prison Wall, Berlin Wall, Great Wall of China and Hadrian’s Wall dyke swarms within cirques 3 and 4. Highlights from individual dykes within and adjacent to dyke swarms include:
- 1.57% Li2O, 250.3 g/t Ta2O5, 0.95% SnO2 across 1.70 m
- 2.04% Li2O, 57.8 g/t Ta2O5, 0.05% SnO2 across 4.00 m
- 3.10% Li2O, 53.6 g/t Ta2O5, 0.03% SnO2 across 0.95 m
- 2.33% Li2O, 59.0 g/t Ta2O5, 0.05% SnO2 across 1.20 m
- 1.67% Li2O, 41.4 g/t Ta2O5, 0.03% SnO2 across 3.75 m
- 1.83% Li2O, 67.3 g/t Ta2O5, 0.05% SnO2 across 1.25 m
- 1.63% Li2O, 52.9 g/t Ta2O5, 0.01% SnO2 across 5.15 m
The dykes are separated by sedimentary wallrocks including quartz sandstone, limestone and shale, which do not contain significant amounts of any elements of interest. Weighted average grade calculations for channel sampled intervals are reported in the following paragraphs. Wallrock separating individual dykes within dyke swarms was sampled in Cirque 4, and the values reported were uniformly low. When calculating weighted average grades for the dyke swarms, the wallrocks were assigned zero values for all elements. Weighted averages reported for dyke material within the dyke swarms omitted wallrock dilution.
A 16.80 m interval was channel sampled across an exposed portion of the Prison Wall on the
north side of Cirque 4. The weighted average grade across this interval was 0.29% Li2O, 14.4 g/t Ta2O5 and 0.01% SnO2 over 16.80 m, including a total of 4.4 m of dyke material that graded 1.12% Li2O, 55.0 g/t Ta2O5 and 0.05% SnO2.
Two individual dykes located 13 m and 27 m north east of the dyke swarm were also sampled, and they returned 0.87% Li2O, 56.4 g/t Ta2O5and 0.03% SnO2 across 1.90 m and 1.57% Li2O, 250.3 g/t Ta2O5 and 0.95% SnO2 across 1.70 m, respectively.
A 35.80 m interval was channel sampled across part of the Berlin Wall on the north side of Cirque 4. This interval yielded 0.29% Li2O, 12.3 g/t Ta2O5 and 0.01% SnO2 across 35.80 m, with dykes within it averaging 1.50% Li2O, 63.9 g/t Ta2O5 and 0.05% SnO2 across a total of 6.90m. The best individual dyke within the dyke swarm returned 2.04% Li2O, 57.8 g/t Ta2O5 and 0.05% SnO2 over 4.00 m.
On the south side of Cirque 3, a portions of the Berlin Wall swarm returned 1.00% Li2O, 21.3 g/t Ta2O5 and 0.01% SnO2 across 4.45 m, including 1.95 m of dyke material that graded 2.29% Li2O, 48.7 g/t Ta2O5and 0.01% SnO2.
Great Wall of China
A 52.60 m interval across the Great Wall of China on the north side of Cirque 3 returned a weighted average grade of 0.38% Li2O, 20.7 g/t Ta2O5 and 0.01% SnO2. Within the 52.60 m interval, fourteen individual dykes were sampled a total thickness of 16.65 m. The combined
thickness of the dykes graded 1.21% Li2O, 65.4 g/t Ta2O5 and 0.03% SnO2.
A 19.70 m interval across a portion of the Great Wall of China on the south side of Cirque 3
averaged 0.50% Li2O, 21.3 g/t Ta2O5 and 0.01% SnO2 over 19.70 m, including four dykes totaling 7.00 m that graded 1.41% Li2O, 59.9 g/t Ta2O5 and 0.04% SnO2.
An individual dyke located 77 m east of the Great Wall of China dyke swarm on the south side of Cirque 3 returned 1.63% Li2O, 52.9 g/t Ta2O5 and 0.01% SnO2 over 5.15 m.
A 10.35 m wide portion of Hadrian’s Wall was sampled on the south side of Cirque 3. This interval returned 1.13% Li2O, 71.1 g/t Ta2O5 and 0.03% SnO2 over 10.35 m. Within that interval, dyke material graded 1.86% Li2O, 116.7 g/t Ta2O5and 0.05% SnO2 across 6.30 m.
Twenty-five metres west of the 10.35 m exposure of the Hadrian’s Wall dyke swarm, two additional dykes returned 0.85% Li2O, 80.9 g/t Ta2O5and 0.05% SnO2 over 1.05 m.”
43-101 - Interpretation and Conclusions
The Little Nahanni pegmatite prospect contains a system of Lithium-Caesium-Tantalum-
type pegmatite dykes that crop out over a strike length of 13km in seven separate groups within the present property boundary. Spodumene and to a lesser extent the micas are potential lithium sources. Accessory tantalite-columbite and cassiterite contents have sufficient grades to bring the rock to within potentially economic values. Continuity of the dykes over a vertical range of 300+ metres is demonstrated by natural exposure and past drilling. So far the greatest thickness of a single dyke encountered is ≈10m, encountered in drill holes 6 and 7. The thickness of each`swarm`of dykes is up to 300m. The most reliable channel sampling has been that performed in 2016. Careful measurement of dyke width and host rock intervals have enabled bulk grades tobe calculated. Such results as 10.35m at 1.13% Li2O, 71.1 g/t Ta2O5 and 0.03% SnO2 are highly encouraging.
The pegmatite system has not been investigated to depth. The potential exists for dykes to coalesce below the level of the lowest cirque and grade could well be different. Closer to the postulated buried intrusive source for the pegmatite beryl could become significant. There is also the possibility that greisen has been developed in the upper portion of the granite, with potential for Sn and W. Drilling of several deep holes along the extent of the system is desirable.
43-101 - Recommendations
The author of the 43-101 considers the following recommendations, made by Heather Burrell of Archer Cathro to the Company in September 2016 to be very pertinent and still relevant: “The following steps would be beneficial for the advancement of the LNPG property:
- Transportation of the 2007 diamond drill core from its current storage location near Finlayson Lake to Whitehorse;
- Re-logging of the diamond drill core to determine if dyke material was blended with sedimentary wallrock material or if some dykes were not sampled. This would allow us to confirm how the previously reported drill results compare to the channel sampling completed in 2016;
- Data input and interpretation of the 3D survey information that was collected by the previous operator;
- Systematic prospecting and channel sampling throughout the property;
- Investigation of pre-sorting technologies to separate mineralized dyke material from wallrock waste;
- Relationship building with the Nahanni Butte First Nation;
- Permitting the land use application for advanced exploration activities on the LNPG property; and,
- Diamond drilling near previous holes and the best channel sample locations.“
- Property situated directly east and along strike of Quantum Minerals’ Cat Lake Mineral Project (previously Irgon Lithium Mine). During 1956-1957, the Irgon Mine was an underground mining operation for spodumene (one of the hard rock sources for Li). The pegmatite had an historic estimate of 1.25 million tons of ore grading 1.51% Li20 (Mineral Inventory File No. 221).
- Equitorial claim block 150 m from south end of Irgon Lithium Mine shaft and approximately 93m east of the last exposed outcrop of the Irgon Pegmatite and approximately 122 m along
- 48 feet of spodumene bearing quartz were drilled in 1948 - not followed up at the time (Manitoba Assessment File 98073 - not 43-101 compliant)
- Property approximately 180km northeast of Winnipeg, Manitoba
- Excellent infrastructure - Provincial Highway 314 in southeast Manitoba cuts through the property
Cat Lake Mineral Project
QMC Quantum Minerals Corp News Release September 7, 2017 reported:
“Between 1953-1954, the Lithium Corporation of Canada Limited drilled 25 holes into the Irgon Dike and reported a historical resource estimate of 1.2 million tons grading 1.51% Li20 over a strike length of 365 meters and to a depth of 213 meters (Northern Miner, Vol. 41, no.19, Aug. 4, 1955, p.3). This historical resource is documented in a 1956 Assessment Report by Bruce Ballantyne for the Lithium Corporation of Canada Ltd. (Manitoba Assessment Report No. 94932). This historical estimate is believed to be based on reasonable assumptions and the company/QP has no reason to contest the document’s relevance and reliability.”
The property lies within the east-trending Mayville-Cat-Euclid Greenstone Belt (“MCEGB”) located along the northern contact of the Maskwa Lake Batholith. This northern greenstone belt has a similar structural geological setting as the Bird River Greenstone Belt (“BRGB”) which is located along the southern contact of the same batholith, and is parallel to and approximately 18km to the south of the MCEGB. The property is located 20km north of the Tanco Mine Property. The BRGB hosts the world-class Tanco rare element-bearing pegmatite dike as well as numerous other lithium bearing pegmatites. The Tanco Mine went into production in 1969 and produced tantalum, cesium and spodumene (lithium). It was previously North America’s largest and sole producer of spodumene (Li), tantalite (Ta) and pollucite (Cs).
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EXX has a first right to a 50/50 joint venture to finance equally the construction of the first magnesium and refining production facility for use by MDD to produce magnesium metal and related products, by using its proprietary magnesium metal technology upon EXX completing its investment of C$1.5 million to MDD.
Upon the successful completion of the first production and refining facility under the joint venture terms, EXX shall then have the first right to enter into a further 50/50 joint venture in regard to participate to financing of the construction of the second production and refining facility on the same terms as the first joint venture.
EXX will also have the right to finance other production facilities on a 50/50 joint venture, on a non-exclusive basis, with MDD once the first two facilities are financed and in operation.