Highlighted Exploration Results
Riverside completed a 1st phase exploration program at the North Breccia and Central Zones in 2017 collecting 91 rock chip and grab samples. Thirty-three (33) of the 91 samples yielded gold assays greater than 0.5 g/t gold (Au) with five samples assaying greater than 3 g/t Au.
The three-best sampled assays were (see press release dated June 6, 2017):
- 133.7 g/t Au with 288 g/t silver (Ag)
- 58 g/t Au with 207 g/t Ag
- 8.42 g/t Au with 87.8 g/t Ag
Nineteen (19) of the 91 samples have silver contents greater than 100 g/t Ag, six of these samples yielding assays that were greater than 200 g/t Ag and the maximum silver assay was 310 g/t Ag.
In September of 2018, Riverside completed a regional soil sampling program. The soil survey covered approximately 30% of the 50 km2 Cecilia 1 concession (see Figure 2 below and press release dated March 5, 2018), and has expanded the targeting around the known central Cerro Magallanes area of the Cecilia Project. The Company continues to advance and refine the known central targets and is also placing equal priority on new property-wide target generation.
Figure 2: Zoning Map of the Cecilia Project Showing a Range of Targets
In October 2018, Riverside reported on rock chip channel samples from the Cerro Magallanes area continuing to expand exploration to different regional areas at the Project (see press release dated October 2, 2018). Riverside’s rock sampling results from the main central rhyolitic dome complex verifies and expands upon historical sampling for gold within breccias and veins on Cerro Magallanes. Dome margins also show positive potential for near surface gold targets. This channel sampling program included 305 samples returning assays ranging from <0.05 to 19.0 g/t Au. Sampling shows consistent gold from the top of Cerro Magallanes (2200m) at the San Jose Target downslope to the northeast to the Agua Prieta-North Breccia Target and through to the Central and East Target (1760m) areas.
Results across the Cecilia 1 concession shows significant upside, with high-grade samples at Medias Rojas up to 12.5 g/t and a 2-m channel sample assaying 2.3 g/t at La Mesa Target. Similar to Cerro Magallanes, mineralization follows primary northeast and northwest trending structural lineaments for which the intersection serves as an excellent migration path for gold-bearing fluids.
