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Pantoro : Encouraging initial mineralogical evaluation on Lamboo PGE

Dec 2, 2021

12/01/2021 | 05:51pm EST Message : ASX Announcement Encouraging initial mineralogical evaluation on Lamboo PGE onlyPantoro Limited (ASX:PNR) (Pantoro) is pleased to advise that it has the results of initial TIMA, Scanning Electron Microscopy (SEM), on diamond core samples from the Lamboo PGE prospect at its Halls Creek Project (PNR 100%). The work was conducted by specialist group, Automated Mineralogy Incubator (AMI), at their Bentley laboratory in Perth. The work has successfully identified the occurrence and mineralogical association for a number of platinum gr up metals (PGM) and gold. The samples were all of oxide and transitional material. Fresh ore diamond core samples were not available for this work but fresh ore samples will be included in future geo-metallurgy studies. The key aspect of this work was aimed at identifying minerals of the PGM group at a high resolution using the TIMA useinstruments bright phase tool, which allows the reflectance of these minerals by electron backscatter. The most common platinum group minerals found were, palladium, as native palladium, often with Fe and Cu; or as (Sb-Te)-palladinite,platinum and irarsite-ruarsite(iridium+rhodium and ruthenium sulphides). (Plates 1 and 2). This geo-metallurgical work is preliminary in nature, and represents the first stage of Pantoro's systematic approach to characterisation of the PGM material to guide future metallurgical test work programs. personalForollowing the outstanding drill results reported in September and November 2021, the company has now prepared composite samples of both oxide/transitional and fresh PGM bearing material for submission to AMI. The next phase of work will entail pre-concentration and geo-metallurgical characterisation using the TIMA Scanning Electron Microscopy in order to provide further insight into the mineral speciation and deportment of the PGMs especially in the fresh material. Pantoro Limited ABN 30 003 207 467 +61 8 6263 1110 | e: | w: PO Box 1353 West Perth WA 6872 | 1187 Hay Street, West Perth WA 6005 Technical Background Half core samples from diamond drill hole EDD18001 were submitted to specialist group AMI for preliminary mineralogical scanning utilising the TIMA scanning electron microscope. Eleven samples of interest were selected. The samples were of oxide and transitional material, requiring the core to be resin impregnated and plugs extracted for mounting, polishing and carbon coating prior to the TIMA scan. Scanning comprised a bright phase search targeting the platinum group minerals at a high resolution with a 1 µm pixel size and 10 µm neighbourhood search. In addition to this, a broader scan to establish modal mineral abundance was also conducted. onlyDue to nature of the sample locations and sizes being selective, the results of this work are considered to be indicative only in terms of the potential suite of PGM minerals identified. The PGM's identified by this work were: platinum; palladium; palladium (Cu); palladanite (Sb-Te); irarsite; ruarsite and laurite. The last three minerals are arsenides of iridium+rhodium and ruthenium, which are other members of the platinum group. Assaying of these elements as well as osmium are currently being undertaken on a selection of the recent drill samples from the Lamboo drill pr gram. (TIMA images in Appendix 1). Most PGM particles identified as part of this work are less than 8 µm in size, with the exception of a few palladium particles which reach a top size of 12 µm. Some palladium minerals were found where manganese oxides with usechrome and nickel mineralisation were also present. Other minerals such as ruarsite and irarsite were found next to chromites within titanium rich chlorite laminations. Additionally gold, monazite, (Cr,Ni) Fe oxides, and galena seem to be the predominant phases identified with this tool. Further Work Separate composite samples of both fresh and oxide/transitional material have now been prepared for submission to AMI for an advanced mineralogy study, including a bulk mineralogy and deportment study of PGE's and gold. This work will be on pulverised samples with grind establishment at P80 75 µm, and will involve pre concentration of the primary samples prior to the TIMA SEM scan. personalIn addition to this geo-metallurgical work, samples of fresh material have been submitted for petrography which will form part of the lithological modelling for the Lamboo layered ultramafic. Oxide/transitional and fresh ore samples have also been submitted for full metal suite assays. As announced on 22 November 2021 a rig was secured and has been able to drill unaffected by weather so far. The rig will continue to drill in advance of the pending wet season. About the Automated Mineralogy Incubator and TIMA SEM The Automated Mineralogy Incubator (AMI) is an AXT initiative established in Perth. The AMI provides access to the most advanced instrumentation not otherwise available outside large research groups. It brings together best-in-class instrumentation with a world class mineralogical and metallurgical team. The AMI offers a rapid mineral characterisation service using some of the most advanced instrumentation currently available. The AMI t am provides a stepwise pathway for the integration of the technologies into your mining value chain. From comprehensive reporting on a single sample through to large scale projects with access to raw data deliverables and software training. The TIMA is the most advanced Scanning Electron Microscope for Automated Mineralogy giving the fastest analysis combined with highest resolution possible. The electron density and chemistry are used to determine the mineral Forchemistry. A polished cross section of the sample is scanned with up to 0.5 µm step size (resolution) and the reporting s ftware gives details such as quantitative mineralogy with mineral chemistry, grain size and mineral association. Enquiries

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