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

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

Braeside Project - Earning 70%

The Braeside Project (E45/2032) is located in the northern Gregory Ranges, 129 kilometres east of Marble Bar with access to the main Telfer mine road.  The project hosts the Braeside Zn-Pb Ag mining district which includes the Ragged Hills mining centre (discovered in 1901) and numerous small mines along a major structure known as the Braeside Fault zone. The historic mines were operative from 1925 to 1959.

 

Please click this link for Braeside Presentation: Braeside Presentation

 

                                                                           Image 1 – Historic Zn-Pb-Ag Ragged Hills Mine

The project consists of 1 granted and 3 exploration licence applications covering the fault structure totalling over 646 km2. There is over 60km of strike of numerous untested Zn, Pb and Cu prospects along a mineralised fault structured corridor.

The Braeside Fault zone contains high grade poly-metallic mineralisation with dominant galena and associated sphalerite and chalcopyrite. Mineralisation at the Ragged Hills Mine is up to 4.2m wide in steep dipping fault/shears. Mineralised breccia/stockworking up to 50m in width is reported at Gossan Hill. Historic artisanal mining focused on massive galena shoots (up to 1.5m in width) within the mineralised zones.

The Braeside Fault zone and associated mineralisation are hosted in Fortescue Group mafic volcanics and volcaniclastics (Pearana Basalt and the Kylena Basalt) underlain by the Koongaling Felsic Volcanics. The felsic volcanics are bimodal with the Fortescue Group basalts and are potentially the source of the poly-metallic mineralisation. Pb age dating of the mineralised basalts hosting galena is the same age as the Koongaling Felsics (2.76Ga). 

 

Image 2: Braeside Tenement Area highlighting Fault Fracture System

Historic Exploration

Drilling

The reported historical exploration is limited to six known drill-holes. Three holes were completed in 1928 by the Department of Mines and three by Anglo Westralian Pty Ltd in 1951, focussing on the workings at Ragged Hills and Barker Well. The best historical drilling intercept at Ragged Hills was reported by Anglo Westralian Pty Ltd in 1951 to be:

·         1.83m (horizontal width) at 8.1% Pb, 4.6% Zn and 6.2ppm Ag.

Due to the historical nature of the drill holes the Company has been unable to locate or provide further drill hole data as required under ASX Listing 5.7.2, however does not believe the excluded information is material and rather these limited results are included to support the Company’s belief in the exploration potential of the Braeside Project.

Grab Sampling

Historic grab sampling conducted within the project area includes three surveys completed in 1987, 1990 and 1993. Very high grade base metal and gold reported in 1987 is interpreted to be associated with a line of workings west of the main Ragged Hills mine area.  A total of seventy seven (77) grab samples returned Zn up to 18.9% (17 samples > 1% Zn), Pb up to 79% (35 samples >10% Pb), Cu up to 11.64% (22 samples >1% Cu), Ag up to 325 g/t (44 samples > 20 g/t Ag) and Au up to 13 g/t (12 samples >1 g/t Au).  The company is conducting further due diligence on the assay results from 1987 and considers the grab samples likely to represent ore samples from old workings.

In 1990 and 1993 regional grab sampling throughout the project area was completed by helicopter and ground traverses. A total of one hundred and sixty eight (168) grab samples were collected over a broad area and very high grade results include Zn up to 8.1% (2 samples > 1% Zn), Pb up to 69.3% (11 samples >10% Pb), Cu up to 7.5% (11 samples > 1% Cu), Ag up to 112 g/t (9 samples > 20 g/t Ag) and only a trace of Au. It is important to note that the focus of the samples in 1990 and 1993 were to find gold prospects.

A previous report in respect to the Ragged Hills mine area stated that “an average of 22 ore samples gives 27.2% Pb and 110.72 g/t Ag”, and noted that copper was present and enriched at the surface. Please see Annexure A - table 2,3&4.

Exploration Model

Litho-geochemistry and check sampling conducted by Rumble has highlighted that the base metal mineralisation has a strong association with sub volcanic porphyritic rhyolites of the Koongaling Felsic Volcanic sequence that lies immediately east of the Braeside Fault system. Litho-geochemistry analysis of the porphyritic rhyolites (calc-alkaline type) indicate the rocks correlate with FIIIa type rhyolites which are considered prospective for VMS deposits. Wall rock alteration geochemistry associated with the known base metal mineralisation at the Ragged Hills Zn Pb Ag deposit returned strong Na, Ca depletion with strong K, Ba, Sn and Al addition. The litho-geochemistry indicates the base metal mineralisation and associated Braeside Fault Fracture system potentially represents a feeder fracture/fault network to underlying sub volcanic porphyritic rhyolites.

Age dating by the Geological Survey of Western Australia supports potential bimodal volcanism with the Koongaling Felsic Volcanics returning an age of 2760 +/- 10 Ma. The host rocks to the base metal mineralisation (Kylena Basalt) has an age of 2760 +/- 30 Ma. Pb age dating of the mineralised basalts hosting galena is the same age as the Koongaling Felsics Volcanics.

The exploration model supports the potential for VMS mineralisation associated with underlying sub volcanic porphyritic rhyolite. At the Ragged Hills deposit, the mineralised feeders are relatively deep indicating the potential VMS sub seafloor deposition level has been stripped off (erosion or tectonic). However, there is potential for high grade Zn Pb Ag pipe like deposits located at feeder fault intersections.

Further north of the Ragged Hills deposit area and along the Braeside Fault fracture system (within the project area), volcaniclastic and shale lithologies have been mapped and may represent palaeo-seafloor positions that have potential to develop VMS deposits. 

                                      Image 3: Exploration Model for the Ragged Hills Mine area. Porphyry related

                                     Massive Sulphides associated with feeder zones –Bimodal VMS Potential.

 

Exploration Process

The Braeside Project consists of multiple high grade Zn, Pb, Cu and Ag deposits and occurrences associated with a major NNW fault zone within mafic volcanics and volcaniclastics over a strike of at least 30km. The poly-metallic mineralisation has not been tested by detail geophysics and geochemistry with only 6 historic drill-holes known partially testing immediately below historic workings.

Wide (50m) zones of breccia/stockworking within the highly mineralised structural corridor remain completely untested at the Gossan Hill prospect.

Rumbles technical team has developed a program to systematically explore the Braeside projects looking to generate first order VMS targets using proven exploration techniques. Rumble will fast track exploration.

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