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Office Location

Head Office

Suite 9, 36 Ord St
West Perth, Western Australia 6005

Tel: +61 8 6555 3980
Fax: +61 8 6555 3981

Fraser Range Joint Venture Projects - IGO 70% RTR 30%

Exploration target(s)

  • Massive Ni-Cu type deposits
  • Palaeo-channel gold deposits
  • Basement gold deposits

Rumble secured the involvement of leading base metal and gold miner Independence Group NL (ASX: IGO) to explore and earn an interest in its highly prospective projects in the Fraser Range region of WA (Image 1) (Fraser Range Project).

IGO has earned its 70% interest in Rumble’s Fraser Range tenements - Rumble is now free carried to completion of a PFS.

             Image 1 – IGO 70% Rumble 30% JV - Fraser Range Projects

Thunderdome JV Project – 70% IGO 30% RTR, Fraser Range

The Thunderdome Project consists of tenement E28/2366 which covers 140sq km’s on the main Fraser Range gravity ridge associated with dense mafic/ultramafic rocks of the Fraser Complex. It has a large prominent dome feature clearly visible on regional airborne magnetic images. This large dome feature is one of the largest in the Fraser Range and has a fold axis of some 22km. Within this larger target area are also several smaller features which may represent later stage intrusions.

The Thunderdome project is located 30 km north-east along trend of the recent Mawson nickel-copper discovery (refer Image 2) made by Legend Mining.

Sailfish Nickel-Copper Target (image 2)

Coincident magnetic low/gravity high features that are conceptual targets analogous of Legend Mining’s Mawson Ni-Cu discovery

Old Soldiers Nickel-Copper-Zinc Target (image 2)

Multiple EM conductors over a 12km Cu-Zn trend have the potential for VHMS and/or magmatic Ni-Cu deposits

Image 2 - Thunderdome Old Soldiers and Sailfish prospects located 30km along trend from the Mawson Ni-Cu Discovery

Thunderstorm JV Project – 70% IGO 30% RTR, Fraser Range

The Thunderstorm Project lies within the Albany Fraser Province and is located some 250km SSE of Kalgoorlie, Western Australia. The Thunderstorm Project comprises of three exploration licences, E28/2528, E28/2529 and E28/2595 for a total area of 323km².

First stage exploration by IGO utilised the SPECTREM AEM system to map the depth of cover and to highlight conductors under shallow cover along with acquiring magnetics data.

The SPECTREM AEM system is a high-definition fixed-wing, time domain airborne electromagnetic geophysical technique. The SPECTREM AEM survey defined two major palaeo-drainage systems that cover up to 50% of the area of the Thunderstorm Project up to 100m in depth.

Along with the geophysics, IGO completed a wide spaced air core drilling program (1.5km by 400m pattern) over a portion of the project which resulted in significant high-grade gold mineralisation intersected intermittently over 13km’s in a large scale palaeo-drainage system and underlying basement on wide spaced air core drilling (1.5km by 400m pattern) at the Themis and Pion Prospects.

Themis Gold Prospect (Image 3)

High-grade gold was intersected within a palaeo-drainage and into basement rocks. Hole 18AFAC30771 returned:

  • 25m @ 2.42 g/t Au from 42m - including 5m @ 10.85 g/t from 49m

Pion Gold Prospect (Image 3)

Some 13 km further along the palaeo-drainage at the Pion Prospect, hole 18AFAC20486 returned:

  • 4m @ 3.8 g/t Au from 86m       

The intersection of significant high-grade gold mineralisation in wide spaced drilling within a large complex palaeo-drainage system over a broad area highlighted the potential for both palaeo-channel and basement hosted gold deposits.

Rumble considers the Themis Prospect gold mineralisation as the most significant gold intercept in recent years in the Fraser Range outside of the Tropicana gold system.

Nickel-Copper Targets

The Spectrem AEM survey indicated that 50% of the bedrock in the Thunderstorm tenements is covered by two major paleochannel systems up to 100m deep.

The Spectrem AEM is blind to mineralization below such thick conductive cover.

In areas of shallow cover the Spectrem AEM survey has identified 5 target areas which will be followed with SQUID MLEM surveys.

Image 3. Thunderstorm with a Spectrem AEM map background – Highlighting planned air-core drilling, MLEM surveys, Flora Survey Area completed and major paleochannel systems (red on image).

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