OPERATIONS
Otso Gold is focused on sustaining the process plant at capacity feeding approximately 500 tonnes to the crusher station during day shift. The ore is then crushed to minus 150mm and delivered to a covered stockpile (the Church).
The current mine plan indicates a target grade of 1.54 g/t, 6000 tonnes per day and a strip ratio of 3.26:1, confirmed by the Technical Report (released August 2021). A full economics and growth strategy will be included in the feasibility due Q3 2021. Target production is 90,000 ounces and plant efficiency 92% overall.
Otso Gold have executed a three-year mining contract with one of Finland’s largest mining and construction companies, Hartikainen. Closely managed by Otso Gold, Hartikainen will carry out Otso Gold’s detailed mine plans.
All operational permits and licenses are in place. Our team is working closely with local regulators to enhance and update safety and health action plans and finalise mine closure and environmental management plans.
Otso Gold Mine is a world-class open-pit gold operation located in Central Finland, 80 kilometers by sealed, all-weather roads south from the City of Oulu.
GEOLOGY AND EXPLORATION
The Otso Gold deposit is located in the Svecofennian orogenic belt, part of the Archean-Palaeoproterozoic Fennoscandian Shield, which formed approximately 1900Ma.
The deposit is an orogenic deposit with gold hosted in shears. The current focus for mining is an area on 988,000 m2 that is well defined to the east and west of a local shear. The quartz sulphide veins carry the gold mineralisation and are found in areas where they are easily identified and other areas where they cannot be seen with the necked eye as they micro veins within the mineralised areas.
PROCESSING
The process plant will be re-commissioned in September 2021. Inspections and required remedial works are ongoing.
Run of Mine ore is crushed using a Metso C160 jaw crusher producing suitable mill feed to a 25,000t stockpile.
Crushed ore is recovered, and conveyor transported to the AG mill followed by a pebble mill at approximately 250 tph. There is a two-stage pebble crushing circuit to control pebble mill load. Both mills are Metso:Outotec design and supply and fitted with 3MW motors. The mills have been inspected and serviced by Metso, the motors by ABB.
