Rumble Resources Limited (ASX: RTR) has intersected a new 2.2km high-grade feeder structure at the recently named the Chikamin Feeder Zone at its Earaheedy Project, 110km northeast of Wiluna, Western Australia.
The significant intersection was obtained in maiden RC drilling results along the Sweetwater Trend, along with the discovery of potentially two new parallel high-grade feeders within the 100% RTR (E69/3787) tenement.
The delineation of these zones has led to a further expansion of the Chinook Prospect’s mineralised footprint to over 5.5km x 2km at Earaheedy.
RC Drilling Results
High grade Zn-Pb mineralisation has been defined over a strike of 2.2km on 200m by 100m drill sections in association with a northwest-southeast trending structural zone, which is interpreted to be a mineralised feeder fault.
The newly named Chikamin Feeder Zone extends into Rumble’s 100% owned tenement (E69/3787) and occurs along the previously highlighted Sweetwater Trend. This new feeder zone is parallel to the earlier discovered Kalitan Feeder Zone, which lies 1.5km to the northeast. Some of the more significant RC results associated with the Chikamin Feeder included:
- 12m @ 5.49% Zn + Pb from 56m (EHRC596), Inc 6m @ 9.90% Zn+Pb from 57m
- 56m @ 2.00% Zn + Pb from 103m (EHRC598), Inc 18m @ 3.78% Zn+Pb from103m, Inc 14m @ 4.25% An+Pb from107m
- 38m @ 2.22% Zn + Pb from 83m (EHRC603), Inc 3m @ 4.63% Zn + Pb from 85m and 2m @ 8.01% Zn+Pb from 118m
- 28m @ 1.76% Zn + Pb from 70m (EHRC592, Inc 1m @ 9.11% Zn + Pb from 71m
The mineralisation is broad (up to 50m true width) with high grade core intervals and is shallow dipping. The Chikamin Feeder Zone is open to the northwest and is likely associated with the original Chinook discovery intercepts (EHRC050 – 24m @ 5.57% Zn + Pb and EHRC044 – 21m @ 4.31% Zn + Pb) which lie to the southeast.
Further Potential Parallel Feeder Zones
Additional broad parallel intercepts of sulphide Zn-Pb mineralisation with high grade core zones have also been delineated approximately 300m and 600m west of the Chikamin Feeder Zone. Results include
- 22m @ 2.88% Zn + Pb from 62m (EHRC609) o Inc 12m @ 4.1 % Zn + Pb from 69m, Inc 7m @ 5.08% Zn + Pb from 72m
- 53m @ 1.13% Zn + Pb from 43m (EHRC632), Inc 6m @ 4.22% Zn+Pb,24 g/t Ag from 72m, and 2m @ 8.15% Zn + Pb, 16 g/t Ag from 76m
The hig- grade mineralisation is sulphide and sphalerite (ZnS) dominant and is also strongly anomalous in Ag. These new zones hosted within the Navajoh Unconformity Unit are likely to further increase the Chinook mineralised footprint which now has a strike length of over 5.5km.
RC Drilling Results – Spur Feeder Zone
RC drilling results to the east of Chinook at the Spur Feeder Zone has shown strong continuity of high-grade mineralisation within broad intervals (60m wide) of Zn-Pb sulphide mineralisation. The Spur Zone is inferred to trend east-west and is contiguous with the Kalitan Feeder Zone. Mineralisation remains open to the east and at depth.
Next Steps at the Earaheedy project
- RC drilling to target further high-grade feeders is ongoing along Sweetwater Trend
- Assays from 38 RC and diamond drill holes from the recent campaign at the Tonka- Navajoh Prospect, which were planned to infill and extend the Colorado and Magazine High Grade Feeder Zones are pending
- The company is currently planning further RC/DDH drilling to test the many potential high grade east-west and northwest-southeast feeder structures that have been recently outlined via lithostructural mapping and interpretation of the geological data compiled to date over the Project
- Sighter metallurgical test work to develop a preliminary flowsheet for the sulphide flotation concentrate is progressing well and will be reported as soon as final results are compiled
- An independent technical study to determine the optimum drill spacing for a maiden resource has commenced, with a maiden JORC mineral resource estimate (MRE) due to be reported in 2023
- Rumble is investigating beneficiation techniques e.g. DMS and sensor ore sorting to increase the potential resource and enhance the optionality for the Project.
