공시 • Aug 09
Catalyst Metals Li Provides Updated Mineral Resource Estimates for the K2 and Plutonic East Underground Mines
Catalyst Metals Limited provided updated Mineral Resource Estimates for the K2 and Plutonic East underground mines. Plutonic East and K2 represent near term developments for Catalyst. These Resources provide the foundation for Catalyst's approach to developing and mining these deposits. The Mineral Resource Statement for the K2 Underground Mineral Resource estimate was prepared during July 2024 and is reported according to the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the 'JORC Code') 2012 edition. The Mineral Resource estimate includes 81,734 m of drilling from 844 reverse circulation (RC) drill holes and 78 diamond drillholes (DD) including RC holes with diamond tails (RCD, DD/RC) completed since 1990. The depth from surface to the current vertical limit of the K2 Underground Mineral Resources is approximately 250m (390 mRL). In the opinion of Catalyst, the resource evaluation reported herein is a reasonable representation of the global gold Mineral Resources within the K2 underground deposit, based on sampling data from RC, RCD, RC/DD and DD drilling available as of 2 May 2024. Mineral Resources are reported below topography and comprise only fresh rock. The K2 Underground Mineral Resource (MRE) has been undertaken with a focus on delineating areas of the MRE with Reasonable Prospects for Eventual Economic Extraction (RPEEE) by underground mining methods. The MRE has been constrained within an underground Stope Optimiser (SO) evaluation from the depleted resource model. SO input parameters include a 1.5 g/t Au cut-off, minimum mining width of 1.5m, minimum stope length of 5m and minimum stope height of 5m. The orientation of SO's is variable depending on the geometry of the mineralisation resource model. The entire MRE consists of Indicated and Inferred Mineral Resources. No Measured Mineral Resources have been reported at this stage of the project. The depth from surface to the current vertical limit of the Mineral Resources is approximately 600 m (1110 mRL). In the opinion of Catalyst, the resource evaluation reported herein is a reasonable representation of the global gold Mineral Resources within the Plutonic East underground deposit, based on sampling data from Face Samples, RC and DD drilling available as of 6 June 2024. Mineral Resources are reported below topography and comprise only fresh rock. Historic open pit and underground mining depletion has been removed. The Plutonic East Underground Mineral Resource (MRE) has been undertaken with a focus on delineating areas of the MRE with Reasonable Prospects for Eventual Economic Extraction (RPEEE) by underground mining methods. The MRE has been constrained within an underground Stope Optimiser (SO) evaluation from the depleted resource model. SO input parameters include a 1.5 g/t Au cut-off, minimum mining width of 2.5m, minimum stope length of 5m and minimum stope height of 5m. The orientation of SO's is variable depending on the geometry of the mineralisation resource model. The entire MRE consists of Indicated and Inferred Mineral Resources. No Measured Mineral Resources have been reported at this stage of the project. MINERAL RESOURCE ESTIMATE (K2): All drilling data used in this Mineral Resource Estimate were from Diamond and Reverse Circulation methods. The sampling database has been compiled from information collected when the Project was under ownership of numerous companies including (listed from most recent): Catalyst Metals (2022 to current), Vango (2013 to 2023), Dampier Gold (2012 to 2013), Barrick Gold (2001 to 2012), Homestake (1999 to 2001), Resolute (1990 to 1999). For the most recent drilling completed by Vango, planned drill hole collars were pegged with a DGPS and marked with wooden pegs hammered into the ground and flagged with high visibility flagging tape. On completion of drilling, the actual drill hole collar position is measured by survey staff using a DGPS working off a network control of survey stations, to an accuracy of 20 mm from the nearest survey station. These coordinates replace the planned coordinates in the geological database. All reported coordinates are referenced to grid system MGA_GDA94 Zone 50. The topography is relatively flat at the location of drilling. The survey station network meets the Mine Safety and Inspection Regulations 1995, section 3.49, where the accuracy of a survey must be not less than 1:5000. The collar locations of historic drill holes were validated from geological logging information from annual reports and the original database when Vango acquired the tenure. The majority of drill holes used in the resource estimate have been accurately surveyed by qualified surveyors using DGPS. Downhole surveys have been conducted at regular intervals using industry-standard equipment. Some magnetic units have affected the azimuth readings where single shot cameras were used and these records have not been used. Many holes have been surveyed using Gyro tools. All Vango holes used in the resource estimate have some form of down hole survey. Recent (2023) downhole survey data was collected by Westdrill using an Axis Mining Technology Champ North Seeking Gyro tool. Surveys are conducted at EOH using a north seeking gyroscope reading every 5 m. If early drilling finds strong hole deviation, then surveys are conducted during drilling (collar, 30 m, 60 m, 90 m etc. to EOH). Survey deviation is supervised by the geologist onsite, with major deviation discussed with the driller at the time. Previous downhole survey data was collected using a REFLEX gyro tool and historically with Eastman cameras, with follow-up downhole surveys carried out by Surtron using gyroscopic survey equipment. Historical downhole surveys were reviewed and verified where information was available through direct comparison within the database. Recent Vango RC drilling was conducted utilizing 5.75 inch face sampling bit. Diamond drilling was conducted utilising NQ2 core. Core was orientated by spear methodology. Historical Diamond holes utilised PQ3, HQ3 or NQ2 core diameter, RC drilling utilised a 5.5 inch drill bit. Historical Drilling: Extensive previous work has been completed by Resolute Mining, Homestake Gold, Battle Mountain Australia, Barrick Mining and Dampier Gold. Previous metallurgical and resource work has been completed by Resolute Mining, Barrick Mining and Dampier Gold. Quality of historical drilling information is varied, but all of the above companies used high quality methodology at the time. Catalyst consolidated the belt in 2023 following the successful acquisition of Vango Mining and the merger with Superior Gold Inc. Sampling and Sub-Sampling Techniques: Recent Vango RC drilling assays are from 1 m samples split on the cyclone (using a cone splitter).