Riikonkoski Project
The Riikonkoski Copper deposit, estimated to have 12.44 M tonnes of 0.52% copper by the Geological Survey of Finland (“GTK”) is an advanced-stage exploration project that has not seen any exploration conducted below 200 m depth. Outside of the Kittilä Gold Mine, this was the second largest exploration effort completed by the GTK in Lapland. Riikonkoski has an existing Resource, and this is classified as a "Historical Resource" under NI 43-101 guidelines.
Zone |
% Copper |
Tonnes |
Itämalmi |
0.48 |
9,560,000 |
Läntinen |
0.68 |
2,450,000 |
Kangas |
0.45 |
430,000 |
Total |
0.52 |
12,440,000 |
Source – GTK Report M-19/2734/-72/1/10
The deposit was discovered and explored in the 1960’s and 70’s by the GTK as potential feed for the Outokumpu Mine in southeast Finland when copper was trading at US$0.59/lb, and the Outokumpu deposit was almost exhausted. Unfortunately, only grades in excess of 3% copper were economic at the time, and exploration was not continued at Riikonkoski. Advances in mining, particularly block panel caving and higher copper prices make Riikonkoski very attractive, not to mention its proximity (6.5 km to the southeast) to Naakenavaara that lies in the same geological formation. 16,326 meters in 72 holes were completed by the GTK (1970 to 1974) and identified four bodies of copper and gold mineralization, NI 43-101 spacing compliant. These bodies are hosted by altered sediments and tuffaceous rocks very similar to to Naakenavaara. The presence of gold at Riikonkoski was not investigated by the previous operator, although selected sampling of only 2% of the core by the GTK did yield values greater than two grams gold/tonne, the best interval being 2.13 meters grading 10.97 grams gold/tonne. Taranis has conducted a comprehensive geological study of the deposit, and it bears a striking resemblance to modern sea-floor deposits that are found in the Mid-Atlantic Ridge at Logatchev, particularly the Ashaz-2 and Logatchev-1 vent fields. These deposits form over active rifts, and in the case of Naakenavaara are dominated by ultramafic volcanic rocks that have extensive sediment cover and are intruded by albite dykes and intrusions. The importance attached with this recognition is that these deposits tend to be large and laterally extensive, and are prone to having high-grade portions located proximal to the areas of hydrothermal venting. Taranis has filed the Mining Claim applications over the deposit, and is awaiting the approval of the Mining Claims by the Finnish Government.