Rumble Resources Ltd (ASX:RTR) has observed stringer style copper sulphide mineralisation from initial visual observations of diamond drill cores recently completed at the Amaryllis gold-copper-silver prospect.
Amaryllis is part of the Munarra Gully Project, 60 kilometres to the north of the township of Cue in Western Australia.
The intersected mineralisation is associated with electromagnetic (EM) plates identified in the Calytrix Zone which forms part of Amaryllis prospect, and along strike from previously identified gold-copper-silver mineralisation.
Munarra Gully Project geological Interpretation – location of Amaryllis Prospect and untested Amaryllis Shear Zone over airborne magnetics.
As anticipated, the drilling has intersected visual stringer copper sulphide mineralisation in all six diamond drill holes, which based on previous drill results typically has a correlation with gold-silver mineralisation.
The diamond core is currently being cut and submitted for assay with results expected early next year.
Rumble managing director Shane Sikorasaid: “Whilst the major Zinc-Lead-Silver discovery at the Earaheedy Project is the Company’s primary focus, Rumble has some highly prospective projects in its pipeline that are at advanced stages of exploration.
“Looking to make new discoveries”
“Rumble will continue to complete high impact, low-cost exploration drilling at these projects looking to make new discoveries and creating value for shareholders.
“Rumble has been systematically advancing the Munarra Gully Project over 3 years, zeroing in on the Amaryllis Prospect and associated shear zone.
“The Amaryllis Au-Cu-Ag Prospect is a large-scale Au-Cu-Ag system with over 2.3km’s of partly tested mineralisation and with over 15km of strike potential (no drilling).
“Within the Amaryllis Prospect, the Calytrix Zone covers over 350m of strike, with previous drilling identifying >1% Cu and >1 g/t Au intersections, highlighting strong continuity of mineralisation.”
Similarities to Chibougamau
Rumble considers the Amaryllis Prospect as having similar geological characteristics to the Chibougamau Gold-Copper Shear Vein Deposit, which has produced 3.5 million ounces of gold and 1 million copper metal tonnes at an average weighted grade of 2.05 g/t gold and 1.76% copper and mined down to 1.1 kilometres in depth in Quebec, Canada.
Based on the potential comparative style of mineralisation with respect to the Chibougamau Gold-Copper Deposit, Rumble late last year completed a ground TEM (transverse electromagnetic) program looking for conductive EM plates at depth which was unsuccessful due to the highly conductive overburden masking any response below 60 metres.
Subsequent to the surface TEM program, a Down Hole TEM (DHTEM) program was completed with 2 deep RC (reverse circulation) holes drilled to 250 metres within the Calytrix Zone.
The aim of the program was to search for conductors below the conductive overburden, targeting conductive high order TEM Plates at depth which may represent high-grade gold-copper-silver mineralisation.
Two significant high-order conductors were defined within the main mineralised shear zone and were very steep dipping highlighting a strong dip component (similar to the Chibougamau Style).
Perspective view of the Calytrix TEM plates and the recently completed diamond core drilling.
Six diamond drill holes were subsequently designed to test the DHTEM plates and along strike intersecting visual stringer copper sulphide mineralisation in all holes, which has the potential for associated gold and silver mineralisation.
The diamond drilling was co-funded by EIS government grant.
Importantly, the proof-of-concept success of the DHTEM survey has indicated it will be a valuable targeting tool searching for potential high-grade gold-copper-silver deposits throughout the entire 15 kilometres of strike.
Next steps
Subject to receipt and analysis of assay results, the next exploration stages include:
- DHTEM survey of the current diamond core holes
- Aim to delineate off hole conductors and potentially further define mineralisation along strike and down dip
- Scout AC (aircore) drilling to delineate the gold-copper-silver corridor along the ASZ (Amaryllis Shear Zone)
- Strategic RC drilling with DHTEM along the ASZ