Flowermountain schreef op 14 maart 2022 12:08:
ReptileAustralia's Deep Yellow, through wholly-owned subsidiary Reptile Mineral Resources (formerly Reptile Uranium Namibia), is investigating the Reptile project (formerly Omahola project). It comprises both Omahola alaskites and paleochannel and sands south of these, especially Tumas, now central to the Reptile project.Omahola Basement/Alaskite includes the high-grade Inca primary uraniferous magnetite deposit at about 200 metres depth, the Ongolo Alaskite 10 km away, and MS7 Alaskite in between and possibly connected to it. An acid leach mill near the Ongolo Alaskite deposit was envisaged treating ore from Ongolo and MS7 Alaskite deposits and the Inca uraniferous magnetite deposit, all possibly mined by shallow open pit (to 200 m).Inca has 2800 tU indicated and 2400 tU inferred resources at about 0.04%U. It is about 10 km south of Etango and 35 km in from the coast. Some 12km northeast of Inca, the Ongolo Alaskite deposit was discovered in 2010, and has 2600 tU measured, 3000 tU indicated and 4000 tU inferred resources at 0.032%U grade and a strike length of up to 2km (contiguous with Extract's Ida Dome). In between is MS7 with 1660 tU measured, 370 tU indicated and 500 tU inferred resource. It is 600m along strike and 400m wide.All resources (Jan 2013) are JORC-compliant. In 2021 the company reported resources of 43,800 tU grading 0.016%U at 100 ppm cut-off for the whole greater Omahola project comprising Inca, Ongolo and MS7.In November 2011 the company submitted an environmental assessment report for Inca envisaging an open pit mine producing up to 2.5 Mt/yr of uranium and iron-bearing ore which could result in production of up to 960 tU/yr, depending on project economics. The company has applied for a mining licence. Environmental assessment of Ongolo-MS7 was done in 2012. A mill situated close to Ongolo was envisaged. However, the company is now focusing on the paleochannel deposits.Test work on Ongolo alaskite ore reported in April 2013 showed promising results from heap leaching. In June 2014 the results were confirmed, with potential uranium recoveries of 80% after seven days' leaching and acid consumption of 12.4 kg per tonne. This means that the cut-off grade could be 100 ppm and hence average grade of the ore would be reduced to 0.0191%, with large increase in recoverable uranium to 48,000 tU.