Drilling Commences at Munarra Gully Cu-Au Project
M51/122 - White Rose Prospect
o Programme designed to extend the known 800m of copper-gold strike potential and outline additional parallel mineralisation
o Programme designed to test wide (up to 80m) zones of copper-gold anomalism previously defined by shallow AC drilling and strong Ni-Cu mineralisation associated with a pyroxenitic intrusion
Rumble's maiden RC drilling program at Munarra Gully discovered significant Cu- Au mineralisation including:
* 22m @ 1% Cu from 29m coincident with 19m @ 2.19 g/t Au from 33m (WRRC001)
E51/1677 - Over 8km of Strike Potential
o Testing significant copper in soil anomalism (3.6km of strike) and a series of magnetic targets under cover, which have been recently defined by airborne magnetics conducted by Rumble
o Designed to test copper gold mineralisation defined by the aircore drilling
Exploration Target: Multiple copper-gold bearing mafic (norite) intrusions
o Target mineralisation style is potentially magmatic Cu-Au and is atypical with respect to mineralised mafic intrusive systems due to high Cu:Ni ratios, high Au and Ag, low S and elevated PGM's*
o The style is similar to known large copper rich mafic intrusive (orthopyroxenite) historical deposits in:
- Brazil (Caraiba mining district - 96Mt @1.82% Cu reserve and production)
- South Africa (Okiep mining district - 94Mt @ 1.75% Cu historic production)
*The style of mineralisation is known to form extensive camps of deposits
Airborne Magnetic Survey (see image 2 and 4 in link below)
Rumble conducted a detailed airborne magnetic survey over the main inferred Cu-Au mineralised trend (Feb 2019) within the Munarra Gully Project. The survey was designed to highlight potential magnetic features related to structure and mineralisation. The survey comprised of 540 line-km on 100m line spacing bearing 145deg with a sensor height of 45m.
From the processing of the magnetic data, a semi continuous magnetic feature has been inferred (see image 2 in link below) which has a strong association with the high order copper in soil anomalism. The feature is under relatively shallow cover (5 to 10m depth of cover) along strike between the copper in soil anomalism and the White Rose Prospect. The magnetic feature has been inferred as potentially being a Cu - Au bearing norite (mafic intrusive) sequence which is the main target mineralisation style at Munarra Gully.
M51/122 - White Rose Prospect (New Cu-Au Discovery Aug 2018, see figure 2 and 3 in link below)
In August 2018 four (4) RC drill-holes returned significant copper-gold mineralisation from a fine to medium grain intrusive pyroxenite (norite) at the White Rose Prospect (ASX announcement - Significant Cu-Au Discovery at Munarra Gully - 30 Aug 2018). All four RC drill-holes intercepted significant copper-gold mineralisation over 160m of strike which is completely open (along strike and depth). See image 2 in link below for significant intercepts. Results included:
o 22m @ 1.00% Cu from 29m coincident with 19m @ 2.19 g/t Au from 33m - WRRC001
During December 2018, five shallow aircore drill traverses (average depth was only 22m and 15m vertical) tested for potential strike extensions to the significant copper-gold mineralisation discovered by the maiden RC drilling at White Rose.
The aircore program extended the strong copper with gold anomalism geochemistry to 800m strike northeast and west from the White Rose Cu - Au mineralisation. In addition, wide widths of copper geochemistry were intercepted (up to 80m) which has significantly added size and scale potential to the Munarra Gully Project.
Aircore and RC Drill Programme for White Rose (Commenced)
o Aircore drilling designed to extend the 800m of copper-gold strike potential - open west and northeast
o RC Drilling to test wide zones of copper-gold anomalism (up to 80m in width) within the 800m of copper-gold untested at depth
o RC Drilling to test new target type - A north-south trending magnetic target tested by the aircore drilling confirmed an ultramafic intrusive (pyroxenite) which returned Ni to 4008 ppm and Cu to 1061 ppm near surface
E51/1677 - Over 8km of Strike Potential
During December 2018, infill and extension lag sampling (344 samples) complemented previous orientation lag sampling (107 samples) for a total of 451 samples and were collected on 200m by 50m and 200m by 100m spacings over a strongly magnetic northeast trending sequence of mafic volcanics with ultramafic and mafic intrusions.
Four (4) significant, coherent copper anomalies were discovered, some with gold anomalism over a strike of 3.6km:
1. Copper A1 Anomaly - 600m strike, up to 400m wide with copper to 437 ppm
2. Copper A2 Anomaly - 500m strike with copper to 444 ppm
3. Copper A3 Anomaly - 2000m strike with copper to 620 ppm and gold to 35 ppb
4. Copper A4 Anomaly - 200m strike with copper to 916 ppm and gold to 19 ppb
Strike Under Cover: Approximately 4km of potential strike is under cover between the copper in lag anomalism and the White Rose Cu - Au mineralisation. Airborne magnetics have shown an undercover magnetic connection and high probability of mineralistation extension - see image 2 in link below
Aircore and RC Drill Programme for E51/1677 (commenced)
- Aircore drilling programmed to test copper in soil anomalism over a strike of 3.6 km and associated magnetic targets under cover over 4km in strike
- RC drilling to be completed on best targets generated by the aircore drilling
To view tables and figures, please visit:
About Rumble Resources Ltd
Rumble Resources Limited (ASX:RTR) (FRA:20Z) is an Australian based exploration company, officially admitted to the ASX on the 1st July 2011. Rumble was established with the aim of adding significant value to its current gold and base metal assets and will continue to look at mineral acquisition opportunities both in Australia and abroad.
Rumble Resources Ltd