Rumble Resources Limited (ASX: RTR) has enjoyed a rise in investor interest, after the company confirmed a major zinc-lead discovery at the Chinook Prospect within its Earaheedy Project near Wiluna in Western Australia.
Expedited assay results of the two RC drillholes EHRC050 and EHRC044, indicate that the Chinook Prospect has the potential to be at the upper end of the company’s existing exploration target based on the consistent grades (4% – 5% Zn + Pb), the true thickness (up to 34m vertical), the intersection of Zn-Pb over 2km of strike, the width over 1.1km and the mineralisation being open in all directions.
The two holes returned;-
- EHRC050 – 34m @ 4.22% Zn + Pb from 66m (True Width – 1% Zn + Pb cut-off) o Includes 17m @ 6.65 % Zn + Pb from 73m. With higher grade core zone of 14m @ 5.02% Zn, 2.03% Pb (7.05% Zn + Pb) from 76m
- EHRC044 – 21m @ 4.31% Zn + Pb from 61m (True Width – 2% Pb + Zn cut-off), Includes 10m @ 5.02 % Zn + Pb from 67m
Rumble’s Zn-Pb exploration target at the Earaheedy Project is between 40 to 100 million tonnes at a grade ranging between 3.5% Zn-Pb to 4.5% Zn-Pb. The exploration target is at a shallow depth (80m), and over 40km of prospective strike (completely open) has been defined within the Earaheedy Project.
Management said that of importance is the shallow nature of the Zinc-Lead mineralisation, which is amenable to large scale open cut mining scenarios.
Managing Director, Shane Sikora, said the results have highlighted the potential for a very large-scale (Tier 1) Zinc-Lead System as the Chinook Prospect drilling has only tested 2km of the 45km of prospective mineralised strike underlining the potential to delineate multiple large tonnage, shallow (open pit) deposits throughout the Earaheedy Project.
The fast-tracked assay results for EHRC050 and EHRC044 along with the previous RC drilling completed by Rumble has highlighted the very-large scale of continuous Zn – Pb (with Ag) mineralisation which is completely open along strike and down dip at Chinook. Image 4 presents the drill hole locations (including all holes awaiting assay results in red) and shows that the mineralisation is open to the northwest with two historic drill holes ending in mineralisation (i.e.TRC66 – 119-120 EOH 2.05% Zn + Pb). Hole TRC66 is 750m along strike from Section 1.
The system is open to the southeast, however, it is interpreted that block faulting has lifted the mineralisation along strike and the zone has moved to the northeast. RC drilling by Rumble has confirmed > 2km of mineralised strike (completely open).
The three sections highlight the continuity of mineralisation down dip. Section 1 reported visible Zn-Pb mineralisation in all seven holes (awaiting results) over a down dip length of 600m. To the northeast, historic drill hole TDH14 (11m @ 3.6% Zn + Pb from 225m) is interpreted to be the same mineralisation zone which infers the down dip length to be 1500m.
The Earaheedy project is located approximately 110km north of Wiluna, Western Australia. Rumble owns 75% of E69/3464 and Zenith Minerals Ltd (ASX: ZNC) owns 25%. Rumble has a single contiguous exploration license application ELA69/3787 (100% RTR) covering the known strike extent. The project area covers the inferred unconformity contact between the overlying Frere Iron Formation and underlying Yelma Formation of the Palaeoproterozoic Earaheedy Basin.
RC and diamond core drilling by Rumble has defined two areas of significant Zn-Pb mineralisation with anomalous Ag. Within EL69/3464, Chinook and Magazine lie 12km apart. Within the project area, Rumble controls 45km of prospective strike which has the potential for multiple large tonnage Zn – Pb deposits.