Riverside exploration work
In November 2019, Riverside completed a second round of exploration. The second phase of recently completed work was conducted to identify the east and west extension of this HG shear zone. Riverside geologists mapped and sampled the eastward extension on this shear and found more high-grade gold including 7 g/t gold from the HG shear zone. The new surface samples are believed to demonstrate a mineralized strike length for the HG zone of about 600 m. These samples align with older VLF (1999) and IP anomalies from a survey completed in 2010 (see Figure 3). The older geophysics shows the anomaly extends both east and west along strike suggesting a potential mineralized strike length of 2.6 km from this data.
Riverside’s first phase of work included 29 rock samples taken from both outcrop and old trenches (see Figure 2).
Preliminary prospecting and mapping work has traced the known quartz-carbonate vein beyond the high-grade sample location over a strike length of 400 m, and historical surveys and field observations indicate that this vein may extend over a strike length of up to 2 km.
The recent work confirmed three previously identified areas and three other possible target zones.
There are two predominant target orientations (see Figure 2):
- The first orientation trends east-west and is associated with contact zones that have been delineated by VLF and IP chargeability geophysical surveys
- A second orientation target zones trend at 340 degrees (NW) and is defined by linear magnetic lows, field geology and soil geochemistry.
Three trenches were completed in 2010 along the HG zone. Trench #1 shows several shears, the largest being 3 m wide and exposed over an 80 m long strike within the trench. Two quartz-carbonate shears were sampled by Riverside in Trench #1. Three of the five samples taken from this trench returned 19.7 g/t, 31.9 g/t and 6.9 g/t gold. Trenches 2 and 3 were sampled in November 2019 by Riverside with one of two samples taken at Trench #3 returning 6.8 g/t gold (2nd exploration program). This sample appears to align with drilling conducted by GLR which returned >3 g/t gold within sheared metavolcanics rocks and is open along strike for further exploration drilling.
Trench #1 in particular showed several shears, the largest being 3 m wide and exposed over an 80 m long strike within the trench. Two quartz-carbonate shears were sampled by Riverside in Trench #1. These shears are within mafic volcanics with sulphide mineralization; primarily pyrrhotite and pyrite. Two of the 5 samples taken from this trench returned 19.7 and 31.9 g/t gold (see Figure 2 below). Another sample 30 m to the east returned 6.9 g/t and still another sample 275 m along trend returned 1 g/t gold. These Riverside samples are on trend with drill hole GL-93-2, drilled by Greater Lenora Resources Corp. in 1993 which returned >3 g/t gold within sheared metavolcanics rocks. Riverside believes this drill intercept and the trench samples demonstrate a 400 m strike length for this target (HG Target) that could extend, based on interpretation of geology and geophysics for 2 km in total strike length (this total strike length needs to be confirmed with more field studies).
Similar parallel targets were delineated to the south of the northern most HG Target. These zones are oriented roughly east-west and coincident with VLF, IP chargeability and soil geochemistry anomalies. The Brinklow zone may align with the historical hole DDH50-01 which intersected anomalous gold (>3 g/t) within mafic volcanics at only 7.6 m downhole.
The third most southern Crib Target extends from the pipeline right-of-way to the southeast corner of the Project and is located along the boundary of mafic volcanic and pillow basalts that also coincides with a VLF and partial gold-in-soil anomaly.
Two other N-NW trending targets were also identified. One of these targets is identified by Hardrock Gold’s historical drill holes #1, #3 and #4 which all returned anomalous gold intercepts >3 g/t gold. One grab sample south and on trend from these holes returned anomalous gold (0.7 g/t) and may define another target area. The trend of this zone is the same as another zone identified near the eastern boundary.
This eastern structure target is delineated by a strong linear magnetic low, interpreted as a fault, and a large, coincident north-south trending gold in soil anomaly. Field surveys near the southern boundary found evidence of faulting in bedrock.