Rumble Resources Ltd (ASX:RTR, OTC:RTRFF) continues to raise the prospectivity of its Earaheedy Project in Western Australia, this time through the discovery of high-grade zinc-lead mineralisation at the Mato prospect.
Assay results for 17 out of the 23 drill holes completed at Mato intercepted flat lying zinc-lead mineralisation, with EHRC733 returning the best results of 16 metres at 5.09% zinc and lead, including a higher grade zone of 10 metres at 7.05% zinc and lead.
Other noteworthy readings include:
- 9 metres at 3.15% zinc+lead from 165 metres (EHRC732);
- 46 metres at 1.04% zinc+lead from 104 metres (EHRC726), including 4 metres at 5.16% zinc+lead from 104 metres; and
- 14 metres at 2.49% zinc+lead from 154 metres (EHRC720).
EHRC733 sulphide examples and sieved Navajoh Unconformity Unit.
Part of larger zone
Notably, the mineralisation in the 17 drill holes occurred within the Navajoh Unconformity Unit and the top of the underlying Sweetwaters Well Dolomite, which are the host lithologies for the Chinook, Tonka and Navajoh deposits.
These three deposits are part of Earaheedy’s globally-significant maiden mineral resource estimate of 94 million tonnes at 3.1% zinc and lead and 4.1 g/t silver.
Six holes with pending assays immediately down-dip of EHRC733 have all intercepted visible zinc-lead mineralisation, as seen through portable X-Ray Fluorescence and logging, although visual results are not considered to be a proxy or substitute for laboratory analyses and should be read with caution.
Location of Chinook and Tonka-Navajoh deposits and the Mato Prospect, highlighting the 9-kilometre-long prospective area.
Moving forward
Rumble is planning to run a ground gravity survey at Mato this month, in conjunction with the existing airborne gravity gradiometry (AGG) survey to better target potential high-grade feeders within the unconformity-related mineralisation along strike of EHRC733 and structurally hosted MVT-type mineralisation.
Work to gain access to heritage areas is ongoing, which will allow Rumble to test both along strike and up-dip of EHRC733 within the previously outlined 9-kilometre-by-3-kilometre area, where multiple feeder fault targets have been interpreted.
Other upcoming work includes:
- Discovery drilling – Reverse circulation drilling aimed at defining the limits of the emerging world-class zinc-lead-silver base metal system within the Navajoh Unconformity Unit, with a focus on discovering new high-grade feeders.
- Metallurgical studies – Variability and composite samples provided by diamond and sonic drilling will be collected to confirm the simple and conventional flowsheet, and further improve the flotation performance. Additionally, value adding beneficiation work such as dense media separation and ore sorting will commence once sufficient volumes of cored material have arrived from site.
- Scoping studies – To commence initial works on scoping studies for the Earaheedy Project, including reviewing some of the early development scenarios/options.
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