Tartana Minerals Restricted (ASX: TAT) (the Firm), is happy to advise that it has obtained assays and metallurgical testwork primarily based on sampling the D15 metallurgical gap drilled in Might this yr. D15 gap was a diamond gap drilled at initially PQ dimension and reducing to HQ dimension and drilled to 300 metres depth and was drilled parallel and beneath TRC098 which had beforehand intersected 77 m @ 0.62% Cu.
Highlights:
- Tartana D15 assays affirm broad zones of copper mineralisation together with 76 m @ 0.60% Cu, 178 m @ 0.40% Cu or 221 m @ 0.35% Cu, all from 31 m depth downhole.
- Wonderful copper recoveries (89%) to saleable copper focus when testing a pattern that was beneath the useful resource grade common.
- Bulk Pattern Tomra ore sorting outcomes point out that utilizing this course of will lead to a 72% grade enhance and recuperate 71% of the contained copper.
- Mineralisation traits signifies the presence of a better grade zones (1 million tonnes @ 0.82% Cu) enabling the potential for a excessive grade starter pit with the remaining useful resource at 8.5 million tonnes @ 0.38 % Cu which will be upgraded if required.
- The outcomes kind a part of a Scoping Research which is able to examine choices for third celebration processing and/or set up of a copper sulphide crushing, milling and flotation plant or a mix of each. That is separate from the present copper sulphate pentahydrate manufacturing which is ongoing.
The opening was efficiently accomplished on thirteenth Might 2024. The assay and metallurgical knowledge have now been obtained and as mentioned beneath, have returned constructive outcomes which will be integrated right into a Scoping Research which will even think about processing choices. These choices embody third celebration processing and/or set up of a copper sulphide crushing, milling and flotation plant and which can be a mix of each.
Tartana Main Copper Mineralisation
The Firm has beforehand suggested the presence of main copper (chalcopyrite) mineralisation beneath the Tartana pit ground and in early 2023 reported 45,000 tonnes of contained copper useful resource to 130 m depth (see ASX launch dated 9 February 2023). The main points are outlined in Determine 1.
Determine 1. (a) Oxide, transitional and first (contemporary) useful resource estimation for the Tartana open pit utilizing inverse distance estimation and a 0.2% Cu cutoff grade. (b) Main copper mineralisation from drillhole D15.
The useful resource grade and tonnage for the overall main and transitional assets at completely different cut-off grades are introduced in Determine 2.
Determine 2. Transition and first assets at completely different cut-off grades (Reported ninth February 2023)
The Firm has designed a drilling programme with a goal of accelerating the present useful resource to higher than 100,000 tonnes of contained copper which incorporates drilling to check mineralisation beneath 130 m depth and in addition shallower mineralisation on the periphery of the useful resource.
Nonetheless, previous to embarking on this drilling marketing campaign, in Might 2024 the Firm drilled a metallurgical take a look at gap (D15). This was a diamond gap drilled with massive diameter core commencing with PQ dimension after which lowering to HQ core to extend the recovered core pattern. It was drilled to 300 metres depth and was drilled parallel and beneath TRC098 which had beforehand intersected 77 m @ 0.62% Cu though D15 was drilled past the sting of the present useful resource. The aim of the outlet was to:
- Take a look at mineralisation traits together with continuity downdip from TRC098 and different close by holes and past the present useful resource.
- Test assay grade variability between chips from the sooner RC drilling and diamond drill core.
- Examine geological options equivalent to lithologies, bedding traits and structural logging.
- Present an adequately sized pattern for flotation and restoration testwork to supply a saleable copper focus.
- Present a big bulk pattern for testing for Tomra ore sorting
The opening was efficiently drilled and accomplished on thirteenth Might 2024. An overview of the findings is introduced beneath.
Determine 3. Drilling of DD15 in Might 2024.
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