Derosa Project Update - Burkina Faso 20th March 2013 Highlights The Bompela artisanal area continues to increase in potential with an open pit now being excavated by artisanal gold miners. A new active artisanal site has been located 850m along strike from the main artisanal workings previously identified. Detailed field mapping & sampling of the site has been completed. Rock chip sampling has returned grades of up to 24.5 g/t gold. The style of mineralisation appears similar to other significant African gold deposits such as Perseus Mining Ltd. s (ASX: PRU) Edikan mine A program leading to a maiden RC drilling program at Derosa is underway. Rumble Resources Limited ( Rumble or Company ) (ASX: RTR) is pleased to provide an update on the Derosa Project in Burkina Faso. Rumble engaged SEMS Exploration ( SEMS ) a leading mineral exploration and mining consultancy company in West Africa, to carry out the following work at the Bompela artisanal area (which forms part of the Derosa Project): Detailed litho-structural and regolith mapping of the east, west, north and south areas of the Bompela artisanal site over a target area of 16km 2 ; Rock chip sampling of outcrops (quartz veins, host rock, alteration/deformation zones) and laterite ridges; and Planning of a RC drilling campaign to target the Bompela artisanal site and surrounding priority targets. This follow up program to fast track the development of the project has been completed. Rumble Resources Ltd Suite 5, 26 Railway Road SUBIACO WA 6008 T +61 8 6555 3980 F +61 8 6555 3981 rumbleresources.com.au ASX RTR 42.4M Ordinary shares 19.2M Listed Options 14.7M Unlisted Options Board of Directors Mr Andrew McBain Managing Director Mr Terry Topping Executive Director Mr Michael Smith Non-executive Director Mr Matthew Banks Non-executive Director Mr David Palumbo Company Secretary Photo 1: Open pit recently excavated at the main Bompela artisanal site.
Detailed Litho-structural and Regolith Mapping The result of field mapping shows that the area is widely covered by alluvium and laterite ridges and plateaus. Alluvium covers large parts of the area of interest which hide the structures undercover. The artisanal miners are only targeting the outcropping laterite hills. Rock types such as amphibolite, granodiorite and felsic volcanic were found outcropping only in the north of the area of interest. Artisanal miners have dug down through the lateritic profile to fresh rock and are bringing up fresh samples of granite, red granite, and amphibolite. The mapping indicated that the host rock unit is commonly red pyrite-altered granite. Some specimens of red granite also contain up to 3% pyrite with minor chalcopyrite. Figure 1: Geological map of the area of interest in the Bompela permit. Area of interest (outlined in blue) is 4 km x 4 km. Artisanal mining sites outlined in yellow. New Artisanal Site Shears filled with quartz veins and chlorite was observed in the artisanal open pit. These veins and the granitoid stock are being targeted by the artisanal miners. The gold mineralisation at Bompela occurs as a vein stockwork developed in competent granodiorite and granite and is typical of granitoid- hosted gold deposits. Whilst completing the mapping around the Bompela artisanal site, SEMS uncovered a new active artisanal site located 850m along strike from the main Bompela artisanal site which can be seen in Photo 2. The area between the 2 sites is covered by alluvial material and is a high priority target for the Company. Mining is very active at the new site, which is mostly focused on the hill slope beneath the laterite escarpment. Apart from the two main sites, artisanal miners are also digging test pits along the laterite escarpment north of the main site. New Artisanal Site Photo 2: Image showing the proximity of both Bompela Artisanal Sites.
Rock Chip Sampling of Outcrops SEMS collected a further 42 grab samples of pit dump material that included quartz veins, fresh white granite, fresh red granite, amphibolite and weathered granite. These samples are from the main artisanal mining area at Bompela and the new active artisanal site located 850m southwest of the main workings. The grab samples returned significant results including 8 samples >1g/t Au (see Table 1) with peak values including 24.5 g/t, 7.2 g/t & 6.46 g/t Au. It is interesting to note that although the peak gold values are from quartz veins the samples taken of the host granite are also highly anomalous averaging 0.9 g/t Au where no quartz veining is present. Figure 2: Map showing the main artisanal site, new site, extent of workings and soil gold anomalism. The follow up exploration program has allowed Rumble to complete an orientation soil geochemical program after mapping of the regional regolith landscape. Three 1 kilometre spaced north-south soil lines were completed with the middle soil line passing through the main artisanal mining site at Bompela. This soils program was undertaken to assess the suitability of the area for low cost surface soil sampling as a regional exploration tool. Assay results, which are limited to the three soil lines, have defined areas of +50ppb Au anomalism on all three lines with a peak value of 104ppb Au corresponding to the main artisanal mining area. Permit Easting Northing Au g/t Description Bompela 529294 1457358 0.96 Pyrite altered granite Bompela 529298 1457346 1.08 Pyrite-chalcopyrite in granite Bompela 529275 1457296 1.45 Weathered granite Bompela 529210 1457251 0.71 Pyrite-chalcopyrite in granite Bompela 529187 1457291 0.74 Weathered granite Bompela 529185 1457405 24.5 Quartz vein Bompela 529185 1457405 6.46 Quartz veinlets in weathered granite Bompela 529246 1457320 0.96 Quartz vein in weathered granite Bompela 529243 1457343 2.15 Quartz vein Bompela 529246 1457341 0.72 Fresh pink granite Bompela 529248 1457348 1.31 Grey quartz vein Bompela 529222 1457322 2.52 Quartz vein in weathered granite Bompela 529204 1457331 7.2 Grey quartz vein Bompela 529168 1457290 0.66 White quartz vein Bompela 528439 1457026 0.88 Quartz veinlets in weathered granite Table 1: Grab samples with >0.5 g/t Au (Gold analysis by fire assay)
Mineralisation Type The gold mineralisation at the Bompela workings is contained in quartz veins and the alteration zones adjacent to the veins. Most of the quartz veins are hosted by granitoid with hydrothermal alteration around the veins appearing to have altered the white granite to a red, or dark pink, granite. Sulphidation with the addition of pyrite and chalcopyrite is also present. The extent of alteration from the veins is still to be tested. This style of mineralisation is similar to that of many other granitoid-hosted gold deposits of the Eburnian age in West Africa (Ghana especially). Examples include Perseus Mining Ltd. s Edikan mine (ASX: PRU) and Xtra-Gold Resources deposit at Kibi (TSX: XTG). These types of deposits typically consist of sets of moderately dipping quartz veins up to 1 m in thickness with wall rock alteration around the veins. Gold is found in the quartz veins and the alteration zones. These granitoid-hosted deposits usually occur near the margins of the granitoid where competency contrasts occur between the granitoid and the country rock. Photo 3: Artisanal miners excavating sections of the Bompela site. Treatment of ore Most of the ore produced by mining is processed at the miners camp where it is crushed, either by hand or machine, put through a sluice box, and what is gathered in the carpet is subsequently panned (Photo 5). One group have been buying crushed material and taking it to this processing plant (Photo 4). The plant consists of many holes dug into the ground and lined with plastic sheeting. The crushed material is placed into two holes either side of a deeper pit. Cyanide solution is then put over the crushed material to leach the gold. The gold-bearing solution then passes through small pipes into the deeper pit where it is collected.
Photo 4: Solution ponds being used to extract gold. Photo 5: Sluicing operations to recover gold. Next Steps Leading to a Maiden RC Drilling Program Underway The mapping and sampling highlighted the potential of the Bompela area and helped develop the next stage of exploration. A staged program is now underway to ensure drill testing of the main artisanal and regional targets is fast tracked. Step 1. Step 2. Step 3. Step 4. Conduct infill geochemical surveying to delineate targets and assist with understanding the structure of the mineralised zones. Undertake a ground magnetic survey over the main area of interest which will detect the magnetic differences in the amphibolites and granites and assist with targeting. RC Drilling The presence of widespread artisanal workings at the main Bompela Prospect and a new area 850m away, along with high grade grab sample results and widespread soil gold anomalism highlights the prospectivity of the project. Step out from the main artisanal areas with Aircore drilling to test beneath areas of alluvial cover. Managing Director s Comment The Managing Director of Rumble, Mr Andrew McBain, said the scope of activity at the Derosa Project is very exciting given the scale of workings achieved by the artisanal miners over the last few months. We are looking forward to the upcoming program and the further testing of this area, which is clearly very prospective for gold mineralisation. - ENDS - For further information visit www.rumbleresources.com.au or email enquiries@rumbleresources.com.au
Figure 3: Map showing location of the Bompela Gold Discovery on the Bompela Permit About Rumble Resources Ltd Rumble Resources Ltd 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. About the Derosa Project Rumble Resources Ltd entered a joint venture and earn-in agreement with Canyon Resources Ltd (ASX: CAY) for the Derosa Project in Burkina Faso under the terms of the agreement Rumble has the ability to earn a 75% interest in the Derosa Project. The Derosa Project consists of 6 contiguous tenements covering an area of over 1,300km². The Project is easily accessible by sealed road, being approximately 125 km northwest of the capital Ouagadougou. The licences are adjacent to the Reo Project operated by Middle Island Resources Ltd (ASX: MDI). The Derosa Project is structurally complex with several large scale north-south and northeast-southwest trending shear zones interpreted across the project area from airborne magnetics data. The main shear zones are interpreted to represent Birimian greenstone belts consisting of mafic to felsic volcanics and sediments which are surrounded by granitoid intrusions. About Burkina Faso Burkina Faso is in West Africa and shares the same highly prospective Birimian geology that underlies Ghana, Mali, Guinea, Cote d'ivoire, Senegal and Niger. West African greenstone belts cover approximately 3,000,000km² with Burkina Faso accounting for 22% making the countries exploration potential enormous. Burkina Faso exploration remains in its infancy compared to Ghana where the advanced exploration climate is host to most of the major West African Gold Mines. Exploration in Burkina Faso has recently increased with the country s new mining code announced in 2003 which is mining friendly. Since 2003, six mines have opened in Burkina Faso and total gold reserves and resources have tripled. Burkina Faso is poised to become the fourth largest gold producer in Africa after South Africa, Ghana and Mali. Burkina Faso has a stable democratic government which is experiencing significant infrastructure improvements, economic growth, security and stability. Competent Persons Statement The information in this report that relates to Exploration Results is based on information compiled by Mr Terry Topping, who is a Member of the Australasian Institute of Mining & Metallurgy and the Australian Institute of Geoscientists. Mr Topping is a fulltime employee of Rumble Resources Limited and has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2004 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Topping consents to the inclusion in the report of the matters based on his information in the form and context in which it appears.