Nordica 3Historical Background
In May of 2000, Michael Brenner put down a couple of large trenches (42A07SE2009/42A07SE2009) on the north side of the Nordica Intrusion, just west of the Watabeag Lake Road, based on information from an airborne geophysical survey (OGS survey?). The trenches appeared to be located very close to the contact between the mafic/ultramafic intrusive, and the Kasba Lake granodiorite to the north. After digging at least 2 metres deep, and not reaching bedrock, they decided to halt the program. I'm not aware if they took any till samples, but if they did not, they should have. Maybe they didn't reach any till horizon.
In September of 2004, Big Red Diamond Corp carried out a till sampling program over parts of the Windsor/Edwards Property, which coincides with the southeastern region of RT Mineral's property (42A07SE2010/42A07SE2010). I'm not sure why they planned their line south of the intrusive? Were they thinking of the glacial movement, and the down ice direction? They were aware of where the contact of the Nordica Intrusion was located, because they had a copy of Map 3421. As the auger drilling took place in 2004, they would have also had access to the recently released OGS airborne magnetic maps, showing where the southern limits of the intrusive was located. I noticed that they did their drilling along an old road, so maybe it was the easy access to the area, that made them auger drill where they did. Who knows!!
In November of 2008, SEDEX Mining Corp carried out a preliminary geological assessment of selected outcrops near the Windward Ni-Cu-PGE Showing. Mineralization at the showing occurs within a layered mafic -ultramafic intrusion, which has been intruded by a granitic intrusion as well as diabase sills or dikes. The mineralization is of two types: 1) stratiform chromium mineralization within a <1-3m wide chromite-bearing horizon that extends along strike for at least 35 metres; and 2) anomalous PGM mineralization that occurs as spotty sulphide disseminations within the gabbro/leucogabbro unit that may extend at least 180 metres.
Five outcrops were visited during the assessment. What interested me was that peridotite seems to be pervasive in this part of the Nordica Intrusion. Also, there may be a relationship between the serpentinization of the peridotite and the chromite bands. The latter could be an important factor, in future exploration programs, especially if a more detailed magnetic survey was carried out. One may be able to detect chromite bands by following the serpentinite horizons, and this could be done with the results of a magnetic survey. Magnetite is often associated with a serpentinized ultramafic rock.
Analysis of hand samples collected from 4 of the outcrops revealed some interesting numbers. There were no samples taken from Outcrop 5. From north to south, the outcrops are Outcrop 1 to Outcrop 4. The best assay results were taken from Outcrop 4, which is in contact with the granodiorite of the Watabeag Lake Batholith. The highest numbers were taken from the Chromite Horizon.
In May of 2009, SEDEX Mining Corp carried out some geological mapping of claim 3019113. This claim is located near the northern contact of the Nordica Intrusion. The only outcrop noted within the claim was located near claim post No. 2. It was mapped as a gabbro/diorite outcrop. About 50m to the north were some old posts, that I figure were the old no. 3 posts of Michael Brenner, who dug a deep trench, but never found any outcrop. SEDEX's outcrop is located on the east-west magnetic trend, suggesting that this outcrop is definitely part of the Nordica Intrusion. They took a sample, which contained pyrite, but I'm not aware of the results.