Rumble Resources Limited (ASX: RTR) has had early success at the recently commenced RC drilling at the Chinook Prospect along the Sweetwater trend at the Earaheedy Project, located 140km northeast of Wiluna, Western Australia.
Chinook Prospect – RC Drilling – Sweetwater Extension (E69/3787)
Drilling commenced late July within the 100% RTR Sweetwater tenement – E69/3787, with the focus on extending the five km x two km Chinook Zn-Pb-Ag-Cu sulphide mineralisation envelope to the west. RC drilling is being completed on 200m by 100m spacings with 36 drill holes completed to date.
The initial RC drilling stage is focused on assessing approximately 1500m of untested highly prospective strike which is part of the main Chinook zone.
All drill holes have intersected the unconformity related Zn-Pb mineralisation recognised through portable X-Ray Fluorescence (XRF) and visual inspection, hosted in the Navajoh Unconformity Unit and the top of the underlying Navajoh Dolomite.
The Zn-Pb results obtained via portable X-Ray Fluorescence (pXRF) analysis are semi-quantitative and deemed to provide an indication of base metal mineralisation. The samples have been sent to a commercial laboratory for more quantitative geochemical analysis, with results anticipated to be received over the coming months.
Multiple drill holes have returned significant sphalerite, galena and pyrite mineralisation indicating potential higher-grade zones whilst testing the extension of the Chinook mineralisation into the Sweetwater tenement.
The sulphide mineralisation style is identical to the Main Chinook Zone. The Chinook Main Zone previously reported intersections including 24m @ 5.57% Zn + Pb from 66m (EHRC050) and 17m @ 5.21% Zn + Pb from 103m (EHRC061).
The RC drilling is ongoing with the plan to keep extending along strike to the west from the Chinook Prospect – see Image 2 for the location of planned drilling of the inferred mineralised zone.
Prior to Rumble’s drilling, only two shallow historic holes previously drilled along the 15km’s of Sweetwater Trend intercepted Zn-Pb mineralisation, 12km to the west of Chinook.
Airborne Gravity Gradiometer Survey (AGG)
The survey flew an area of approximately 400 sq. km on 250m line spacings and covered the Chinook, Tonka and Navajoh Prospects and over 40km of highly prospective strike (Navajoh Unconformity).
Final processing and results are pending. Preliminary processing (vertical gradient) has highlighted a strong association with gravity lows and zones of significant base metal mineralisation.
The interpreted gravity lows will be the strong focus for upcoming drilling. Ongoing geological and structural interpretation suggest several factors may reflect the gravity low areas including replacement of carbonates with silica alteration (hence mineralisation), less indurated basement (from alteration) and laterally extensive collapse breccias overlying feeder zones. For further information please visit: https://rumbleresources.com.au/
