Red River Resources Limited (ASX: RVR) is pleased to announce it has been granted the Toomba Project (EPM 27357) and applied for the Don Project (EPMA 27520) near its Thalanga Operations in northern Queensland as part of its strategy to maximise exposure to gold.

Small-scale historical gold mining activities have occurred in both project areas, which are 20-30km northwest of Thalanga, with high-grade gold mineralisation (hosted in mesothermal quartz veins) at multiple locations in the project areas.

Exploration by previous tenement holders confirmed the presence of high-grade gold mineralisation in multiple identified vein systems at the Toomba Project (Toomba Old Workings, Toomba East, Central and Lady Barrington) and the Don Project (Don and Don SW).

China Yunnan Copper completed nine reverse circulation drill holes at the Toomba Project in 2008/2009, which confirmed the presence of a laterally extensive mesothermal vein system, with PC005 returning an excellent intersection of 2m @ 26.5 g/t Au and 43 g/t Ag from 43m down-hole at the Toomba Old Workings. This result was not followed up and represents a high priority exploration target for Red River.

Toomba Exploration and Mining History

Operations at the Toomba Mine (Toomba Old Workings) commenced in 1889, and several shafts were sunk, one to a depth of 130 feet. The workings were located on a fissure vein in granite, which was traced for about 450m on the surface. The fissure ranged from 30cm to 1.2 metres in thickness, consisting of quartz with pyrite, galena and sphalerite. Gold assays ranged from 15 dwt (pennyweights) to one ounce per ton. Total output is recorded as 335 ounces from the Toomba Mine (QLD Mines Dept 1936).

Toomba Project Area Geology and Mineralisation

Previous rock chip sampling by Mt Stewart Gold/China Yunan Copper between 2005 and 2010 produced highgrade gold (average gold value of 9 g/t Au) values with samples also returning results of up to 128 g/t Ag, 0.7% Cu, 3.4% Pb and 4.8% Zn.

The Central Vein is a zone of veining and veinlets seen in outcrop, float and historic exploration trenches for more than 400m with a further occurrence 800m to the north. Rock and chip sampling returned assay values of up to 9.65g/t Au.

The Toomba East Vein Zone strikes for more than 300m and has been mapped as a trend of small pits and exploration trenches with coincident area of sulphidic quartz veinlets as float on the surface. Samples returned maximum results of up to 6.25 g/t Au, 68 g/t Ag, 1.25% Pb and 0.15% Zn.

The Lady Barrington Vein has been exploited by a deep shaft and strikes for approximately 200m. Rock chip samples returned values to 8.81 g/t Au, 6 g/t Ag, 0.57% Pb and 0.18% Zn.

China Yunnan Copper (CYC) completed nine reverse circulation (RC) holes in 2008/2009 testing vein systems at the Toomba Project. Six RC holes (643m drilled) tested the Toomba Old Workings, two RC holes (215m drilled) tested the southern portion of the Central Vein structure and three RC holes (340m drilled) tested the Toomba East Vein.

Three RC holes (PC005, PC006 and PC007) tested the northern portion of the Toomba Old Workings. PC005 was designed to test the structure beneath the northern workings. PC005 intersected a quartz vein at 43 metres down hole, with a down hole width of approximately 1.3m. The intersection returned an excellent assay result of 2m @ 26.5 g/t Au, 43 g/t Ag, 0.4% Cu, 0.9% Pb and 1.8% Zn.

PC0006 was drilled 50 metres to the south (from PC005) along strike and under more old workings and an outcropping zone of veinlets hosted in sericite altered granite. PC006 intersected a 5m wide zone of quartz veining from 47m to 52m downhole. The maximum gold assay was 1m @ 0.27 g/t Au and the main vein zone assay up to 0.19 g/t Au.

PC007 was drilled a further 116 metres south along strike under old workings. PC007 intersected a solid zone of vein quartz from 37m to 42m downhole. The main vein assayed to only 0.4 g/t Au and the best result came from the hanging wall veining (0.55 g/t Au).

The CYC drilling confirmed the presence of high-grade gold mineralisation at in the northern section of the Toomba Old Workings in a laterally extensive mesothermal vein system. This drilling has not been followed up and the intersection in PC005 is still open down dip and to the north.

Don Project Exploration and Mining History

Historical mining activity in the Don Project area was limited to the Don and Don SW mines. At the former, historical records indicate a shaft was sunk on the Don reef to a depth of 53m and about 0.75m wide. Some stoping was undertaken at the 46m level and back to the 18m level. The ore crushed assayed about 1 oz Au. In 1935, ore from the surface was crushed and assayed at around 15 dwt (pennyweight, where 1 penny weight = 1.56 g/t) Au.

Don Project Area Geology and Mineralisation

Gold mineralisation at the Don deposit is hosted by a 0.4m to 2.0m thick quartz vein that extends over 250m, striking NNW with an average dip of 75-degree to the WSW. Several small pits expose an en echelon array of smaller quartz veins on the eastern side of the main vein, in an overall N-S zone. Historical samples of mineralised quartz vein material taken from mullock heaps contained between 1 to 3% galena-chalcopyrite-pyrite-bornite and returned assays up to 54.7 g/t Au.

The Don SW workings, about 600m SW of the Don Workings, extend over a N-S trend of approximately 400m. The main mineralised quartz vein observed at surface, extends over 270m, is 0.4-1.0m wide, strikes 345-degree and dips WSW at 70-degree to 80-degree. At the northern end of the reef, a set of shallow pits trace another quartz vein with a strike of 350-degree over a length of 180 metres. Historical sampling of mineralised quartz taken from mullock heaps contained 3-6% galena-chalcopyrite-pyrite-bornite, returning assays of up to 9.6 g/t Au. At least five percussion holes were drilled by Rowe Drilling in 1992-3, from the west, but no company records of the drilling are available. It is understood that drilling was undertaken by prospectors on a speculative basis.

Next Steps

Red River has commenced exploration activities at Toomba (mapping, sampling) to be followed up by trenching to better define the extent of the vein systems prior to drilling. Upon grant of the Don tenement (expected shortly), Red River will commence similar activities.

Contact:

Mel Palancian

Tel: +61 3 9017 5380

Email: mpalancian@redriverresources.com.au

(C) 2020 Electronic News Publishing, source ENP Newswire