Map 1. Seymour Lake Location Map. Click map to enlarge.
Map 2. Seymour Lake and KM61 Claim Map. Click map to enlarge.
Map 3. Regional Geology map of the Caribou Greenstone Belt, with locations of other regional exploration. Click map to enlarge.
Map 4. Location of North and South Aubry zones at Seymour Lake.
Map 5. Drill hole and trench locations at North Aubry pegmatite zone, Seymour Lake. Click map to enlarge.
Map 6. Cross section 99+50 at North Aubry Zone, Seymour Lake. Click map to enlarge.
Map 7. Cross section 99+25 at North Aubry Zone, Seymour Lake. Click map to enlarge.
Map 8. Drill hole and trench locations at South Aubry pegmatite zone, Seymour Lake. Click map to enlarge.
Map 9. Longitudinal cross section at South Aubry Zone, Seymour Lake. Note Li2O intercepts at main pegmatite body and lower horizon. Click map to enlarge.
Map 10. Drill Location Map, Seymour Lake Project, January, 2010. Click map to enlarge.
Map 11. Lithium Enzyme Leach Soil Results, Seymour Lake Project, January 2010. Click map to enlarge.
Map 12. Lithogeochemical Sampling Results, Seymour Lake Project, January 2010. Click map to enlarge.
- Highly fractionated spodumene-subtype pegmatite with bulk Ta-enrichment from 0.01 -- 0.02% Ta2O5
- Significant Ta values intersected in trenches including 2.49% Ta2O5 over 4m
- Significant Li values intersected in drill core including 2.081% Li2O over 16.9m
- Similar grades of Ta2O5 and Li2O and geometry as Tanco's Bernic Lake Mine in Manitoba
- Mineralization open down dip to the east at the North Aubry and along strike (N and S) and down dip to the east at the South Aubry
- New Li, Ta and Be targets identified from enzyme leach soil sampling program in 2008
- Completed 2362 m drill program in 2009
The Seymour Lake tantalum (Ta), lithium (Li), beryllium (Be) property is located approximately 45 km northeast of Armstrong in northwestern Ontario. The property is road accessible via Hwy 527 from Thunder Bay to Armstrong, east via the gravel Jackfish forest road (57 km), and then south along the Ferland logging road (5 km). The main Seymour property is approximately 10 km from the Ferland Station along the CN Railway and connected by a nearly complete improved road. Two proposed Ontario Hydro hydroplants (2013) are within 10 km along the Little Jackfish River to the east and northeast.
The main claim was optioned from Stares Contracting of Thunder Bay, ON and covers zoned, coarse-grained granite pegmatite dikes carrying significant values in tantalum (Ta), beryllium (Be) and lithium (Li) in the North and South Aubry zones. The property totals 51 claim units, covering the main showings and the area of potential pegmatite extensions (open) to the northeast, east and southeast, for a total of 816 hectares.
The Aubry pegmatites were discovered in 1957 by prospector Nelson Aubry of Nakina, Ontario. The prospect was worked by Anaconda Canada in the late 1950's, and by ACA Howe for the Tantalum Corporation of Canada during 1969 and 1970. In 1979, E&B Explorations Inc., in partnership with Cominco Ltd., also briefly explored the prospect. In 1999, geologists from Gary Clark Consulting undertook limited rock sampling, which led to the staking of the main claim covering the Aubry zones by Stares Contracting of Thunder Bay and eventually the option by Linear Resources (now Linear Gold) in January, 2001. Linear completed extensive sampling, trenching and drilling programs in 2001 and 2002.
Stockport Exploration (formerly Linear Metals) acquired a 100% interest in the Seymour Lake Property from Linear Gold (formerly Linear Resources) in April 2006. The original core claim (1245661), and additionally those adjoining claims within a 1 mile buffer are subject to a 3% NSR to Stares Contracting (50% purchasable for $1,000,000).
The Seymour Lake property is located in the Caribou Greenstone Belt, which trends ENE along the top of Lake Nipigon, near the northern margin of the Wabigoon Subprovince. A prominent SW-trending portion of the belt wraps around the NW end of a large composite felsic pluton in the property area. The Stockport Exploration claim group (including KM61 claims) covers a large (1 km x 7 km) lensoid-shaped contact zone between the pluton to the south and metabasalts to the north.
The pegmatite dikes are associated with the granitic pluton and intrude the mafic volcanics (pillowed lava, amphibolite, and tuff) that make up the majority of the Seymour Lake property. Pillowed lava in TR-NA-5 shows streching in the N-S direction with stratigraphic tops toward the north (after Pye, 1968). Dykes associated with the contact between the metavolcanics and the felsic pluton are generally coarse-grained and contain spodumene, but not tantalite mineralization. Dikes that have injected farther into the metavolcanics and away from the contact are finer-grained and contain beryl, spodumene and tantalite-columbite mineralization (see Image 3). Typical mineralization at the North Aubry pegmatite is an assemblage of muscovite, spodumene, quartz, K-feldspar and albite +/- manganotantalite +/- beryl +/- apatite +/- lepidolite +/- garnet. The South Aubry pegmatite is characterized by spodumene-bearing feldspathic zones, often with accessory blue to green beryl with locally abundant tantalite in the southernmost trenches.
Linear Resources Exploration Results (2001 - 2002)
The work carried out by Linear in the summer of 2001 demonstrated the economic possibilities for a significant tantalum deposit(s) in the area. The North Aubry vein has been exposed over a +200 m strike length with widths up to 50 m. Values in the TR-NA-5 area at the south end of the zone reach 2.49 % Ta2O5 over 4 m with the tantalum values in the tantalite indicating extreme fractionation. These values are the highest encountered in Ontario and similar to those from the Tanco Mine in Manitoba, Canada's only tantalum producer. Lithium alteration in the mafic volcanics indicates an intense mineralizing pulse which may have produced stacked zones of pegmatites.
Exploration at The South Aubry zone, located 600 m to the south of the North Aubry uncovered coarse tantalite mineralization with significant Ta values; for example: a lepidolite bearing boulder located to the south of the South Aubry near TR-SA-4 yielded Ta2O5 values of 541 ppm (0.054 %).
A drill program at Seymour Lake, testing primarily for tantalum, was completed during August 2002 with a total of 1,866 metres of NQ core drilled in 32 drill holes. The drilling tested the North and South Aubry zones, where lithium (spodumene), tantalum (tantalite), and beryllium (beryl) mineralization is found in shallow dipping granite pegmatites over a strike length in excess of one-kilometre. The zones remain open to the north and south and down dip, and other stacked pegmatites have been located in the area.
The 2002 drill program tested the North Aubry zone over a 200-metre strike length with 23 shallow vertical holes (SL-02-1 to 16, SL-02-25 to 31), with 21 of 23 holes intersecting pegmatites hosting Li2O mineralization. In the South Aubry area, drilling tested a 380-metre strike length with eight shallow vertical holes (SL-02-17 to 24), all of which intersected Li2O mineralization. The drill intersections are close to true widths due to the near horizontal to shallow dipping nature of the units.
While the drilling was targeted primarily at the tantalum potential of the zones, significant lithium mineralization was intersected in the North Aubry zone including: 1.735% Li2O over 14.25m in SL-02-2, 2.386% Li2O over 9.20m in SL-02-4, 0.955% Li2O over 20.65m including 1.190% Li2O over 14.74m in SL-02-9, 2.212% over 5.70m in SL-02-14, 1.325% Li2O over 23.85m including 2.059% Li2O over 9.00m and 2.232% Li2O over 3.04m in SL-02-27, and 1.475% Li2O over 17.72m including 1.937% Li2O over 12.97m in SL-02-31. Click here for link to full North and South Aubry DDH highlight table, including Li2O, Ta2O5 and BeO intercepts.
Although not specifically targeted in the drill program, significant lithium (spodumene) mineralization was also encountered at the South Aubry zone including: 1.460% Li2O over 4.25m including 2.389% Li2O over 1.80m in SL-02-17, 0.757% Li2O over 13.30m including 0.976% Li2O over 4.60m in SL-02-20, 0.648% Li2O over 10.36m including 1.368% Li2O over 2.15m in SL-02-21, and 0.390% Li2O over 7.07m including 1.401% Li2O over 2.92m in SL-02-22. Click here for link to full DDH highlight table.
The drilling indicates that the pegmatites on the Aubry trend occur as an undulating system of stacked sheets that dip shallowly to steeply eastward. The main part of the North Aubry zone ranges in true thickness from 10 to 28 metres. Mineralization remains open down dip to the east and continues as a narrower zone to the north and south. The main part of the South Aubry zone maintains an estimated true thickness of 15 to 16 metres over a strike length of at least 95 metres. It remains open along strike to the north and south, and down dip to the east.
The results indicate there are higher-grade lithium and tantalum zones to depth at the North Aubrey and there is potential to locate high-grade zones at the South Aubry. Further, there remains excellent untested potential for additional pegmatites, both stacked at depth and along strike, along the Aubry trend. The Seymour Lake property remains highly prospective for further discoveries and a re-evaluation of data is underway leading to a fall 2009, detailed exploration program, including drilling.
2009 Exploration Results
In 2008, concurrent with exploration of the KM61 property, 200 metre spaced grid lines at Seymour were refreshed and an Enzyme Leach soil survey undertaken at a 50 metre sample spacing along the lines. At total of approximately 640 samples were collected, which successfully indicated several potential areas of additional pegmatite-hosted lithium-tantalum-beryllium mineralization, both close to the known occurrences and at kilometric distances from them.
A drill program was undertaken in the fall of 2009 to follow-up the soil sampling results and to test for subsurface extensions of the know mineralization. Approximately 2,400 metres in 19 holes tested extensions of the North and South Aubry zones, as well as several Enzyme Leach anomalies, including one located down-dip of the Pye Showing. Concurrently, grid mapping, prospecting, lithogeochemical sampling, and extensions to the Enzyme Leach soil survey were completed.
The drilling significantly extended the area of the Main Horizon at the North Aubry, including the discovery of several new, stacked, high-grade lithium-bearing pegmatite sills (Lower-1 and Lower-2) at depth below the Main and Lower Horizons. The drilling also intersected a thick pegmatite sill down-dip of the Pye occurrence, indicating potential for mineralization over a kilometric area, supported by several untested lithium in soil anomalies and several areas of anomalous lithium in the host volcanics.
During the 2009 drill program, only two narrow high grade tantalum intersections were made: SL-09-3A with 1.0 metre of 0.221% Ta2O5; and SL-09-33 with 0.84 metres at 0.098% Ta2O5. Most of the 2002 and 2009 holes hit locally anomalous zones of tantalum (0.01 to 0.05% Ta2O5), indicating a strong bulk enrichment in the pegmatite, although bulk sampling will likely be necessary to establish true tantalum grades due to its often "nuggety" occurrence as relatively coarse but irregularly distributed crystals.
Several holes completed on the South Aubry indicate the Main and Lower horizons appear to locally pinch out to the north and northeast (although SL-09-48 intersected several narrow horizons, including 1.23 metres at 0.422% Li2O and 0.062% BeO, and 2.32 metres at 0.854% Li2O and 0.032% BeO). Further testing of the showing should concentrate to the south and west, where the horizons are open, and also supported by anomalous soil and/or lithogeochemical anomalies.
Drilling of the Aubry occurrences during the 2002 and 2009 drill programs indicates that there is an extensive buy only locally tested system of rare-metal enriched pegmatite sills, both laterally and stacked at depth. Additionally, soil and lithogeochemical sampling indicate that there is very good potential for the discovery of significant extensions to the known occurrences, as well as the possibility of discovering new zones, especially to the east and south.
Stockport holds a 100% interest in the Seymour Lake property subject to a 3.0% NSR over the area where the previous drilling was conducted (see Map 2). Stockport Exploration can repurchase 50% of the 3% NSR for $1,000,000.