Tombola Gold Ltd (ASX:TBA) has intersected a wide zone of copper mineralisation based on visual inspection and supported by a Niton handheld XRF analyser in the first diamond drill hole in a four-hole programme at Little Duke Project in Queensland, Australia.
This first hole (of hole LD22DD001) was drilled as part of the recently announced 2,500m Golden Mile drilling programme. The hole was drilled 20m south of the last drilling carried out on the area in the 2019 programme, where intersections of significant copper, gold and cobalt were recorded in LD19RD025 of 68m @ 1.4g/t Au; 0.4% Cu and 245 ppm Co (incl 14m @ 4.7g/t Au, 1.3% Cu and 529ppm Co), and LD19RC023 of 121m @ 0.9g/t Au, 0.2% Cu and 287ppm Co.
Mineralised zones of stronger mineralisation containing chalcopyrite were intersected based on visual observations between 94 – 106m, 153 – 159m and 240 – 250m within a broader zone of disseminated sulphides.
“We are very excited with the significance of this drill hole. The 170m of mineralisation from 70m beneath surface has the potential to establish this project as a very large target for the copper, gold and cobalt operation located proximate to our flagship Mt Freda Gold Mine that is expected to produce initial gold over the coming months,” Managing Director, Byron Miles, said.
The mineralised drill core contains extensive intervals of quartz – carbonate hydrothermal breccia contained within a conductive shale-host with significant chalcopyrite, massive pyrrhotite and pyrite in an iron sulphide copper gold (IOCG / ISCG) style of mineralization. Importantly, the trend of mineralisation appears to continue to the south along the northwest margin of a large magmatic body interpreted to be deep and large igneous intrusion.
Future targets at Little Duke will continue to be defined in the sparsely drilled area going to the south testing for continuity of the strong sulphide mineralization intersected in this drill hole.
The Little Duke project is located within the Golden Mile, approximately 800 m northeast of the Mt Freda Open Cut, located above a significant conductive structure previously identified by Ausmex.
Historic mining was previously focused on high grade gold from surface located with a steeply dipping quartz breccia. Maiden drilling on the project by Ausmex in 2018 identified a deeper graphitic shale “shear zone” that hosts extensive gold, copper and cobalt mineralisation. Follow up drilling in 2019 encountered chalcopyrite + pyrrhotite_carbonate_quartz brecciation and veining.
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