Third Rig On Site At Chinook Zn-Pb-Ag-Mn Discovery

Rumble Resources Limited (ASX: RTR) has added an extra 10,000m to its 30,000m drill programme on the exciting and rapidly advancing Chinook Zinc-Lead discovery at the Earaheedy Project, located approximately 110km northeast of Wiluna, Western Australia.

Following the announcement of an 125% increase in the zinc-lead mineralised footprint in July 2021, the current drill programme at the Earaheedy Project has been upgraded to 40,000m.

Subsequently, a third RC rig has arrived onsite to assist in scoping out the overall size of the shallow northeast dipping Zn-Pb- Mn-Ag mineralisation at the Chinook discovery.

Once the limits of the mineralisation are defined, drilling will then focus on the multiple inferred feeder structures which contain near surface higher-grade Zn-Pb-Mn-Ag mineralisation. In addition, RC drilling is also planned to test the ground between Chinook and the Magazine/Navajoh prospects that lie some 8 to 10km southeast along strike from Chinook.

RC Drilling – Current Programme

A total of 88 RC drill holes completed for 14,988m
Currently three RC rigs on site
Only four holes reported to date of this current programme – Significant Increase in Earaheedy Mineralisation Footprint)
Thirty-two RC drill hole assays at laboratory awaiting analysis
Sixteen (RC drill hole assays in transit to assay laboratory
Thirty-six RC drill hole assays on site

Diamond Core Drilling

Diamond core drilling at Chinook has focused on twinning previously reported RC drill-holes to enable grade reconciliation. However, several attempts to gain full recovery of core has been unsuccessful due to water and alternating hard and soft layers within the mineralised zone. Sonic drilling is now being trialed to optimise core recoveries.

Eight diamond drill holes completed for 904m
All holes returned less than 50% core recovery

Sonic Core Drilling

Rumble has engaged Sonic drilling specialists (Groundwave Drilling Services) to assist in improving the core recovery within the mineralized zones. The Sonic drilling programME will initially twin three (3) drill-holes (EHRC044, EHRC050 and EHRC061). The first drill-hole EHS001 successfully completed a twin hole of EHRC050 (34m @ 4.22% Zn + Pb from 66m – returning very high (95%) core recoveries.

Surface Geophysics – Target Generation

Rumble recently completed gravity and passive seismic surveys which are now being processed and interpreted. The aim of the surveys is to complement the airborne magnetics and aid in understanding the structural controls that upgrade the tenor of the Zn-Pb-Mn-Ag mineralization of the very large sediment hosted base metal system.

Once the results are analysed, the combination of airborne magnetics, gravity and passive seismic may provide a valuable targeting tool to vector into the inferred higher-grade base metal feeder structures at the Chinook discovery and delineate new discoveries along the 45km’s of prospective strike within the Earaheedy Project.

Gravity Survey

An orientation gravity survey completed over the main known extent of Chinook and immediate surrounds confirmed multiple NW to NNW trending gravity trends that correlate with the multiple inferred feeders (also interpreted from airborne magnetics) which host the higher-grade Zn-Pb mineralisation. Following on from the success of the orientation program, Rumble has expanded the programme to:

• Cover the 12km of strike between Chinook and Magazine – 2,059 gravity stations on a 100m by 100m grid have now been completed, WHILE Modelling (inversion) and geological reconciliation is ongoing

Passive Seismic Survey

A passive seismic survey has been completed at the Chinook Prospect and was designed to coincide with existing drill-hole sections.