Red River currently holds approximately 610km2 of exploration permits in the highly prospective Mt Windsor Belt, and these are divided into five project areas:

Project

Tenements

Thalanga

EPM 16929, EPM 10582

Liontown Waterloo

EPM 14161, EPM 10582, EPM 25815

Highway Reward

EPM 10582, EPM 25985, EPM 18713, EPM 18471, EPM 26718

Ermine

EPM 12766, EPM 25815

Trooper Creek

EPM 18470

 

Red River Tenement Holding in the Mt Windsor Belt

The Mt. Windsor Volcanic Belt, located south of Charters Towers (Central Queensland) is one of the most prospective geological provinces for volcanic hosted (VHMS) mineralisation in Australia. The initial discovery in the Belt was made in 1905 (Liontown), and a number of additional deposits were discovered in a 15 year period of intense exploration activity, from the mid 1970s to the mid 1980s, triggered by the discovery of the Thalanga deposit in 1975.

To date, the major deposits discovered and mined in the Belt include:

Thalanga (7.0Mt @ 2.5% Cu, 3.7% Pb, 11.7% Zn, 0.6 g/t Au & 98 g/t Ag)

Highway Reward (3.8Mt @ 6.2% Cu & 1 g/t Au)

Volcanic Hosted Massive Sulphide (VHMS) Deposits

Volcanic Hosted Massive Sulphide (VHMS) deposits are a globally important class of base metal deposit typically with combinations of copper, lead and zinc and significant precious metals (gold and silver). The polymetallic content of VHMS deposits positions them as one of the most desirable deposit types for security against fluctuating prices of different metals.

VHMS deposits form at or near the sea floor through the focused discharge of hot, metal-rich hydrothermal fluids and are strata bound accumulations of sulphide minerals that precipitated at or near the sea floor in spatial, temporal and genetic association with contemporaneous volcanism. (Franklin et al, 2005). VHMS deposits are discovered in submarine volcanic terranes that range in age from 3.4Ga to actively forming deposits in modern seafloor environments. Most, but not all VHMS deposits, occur in clusters that define major mining districts. The clustering is attributed to common heat source that triggers large scale subsea floor fluid convection systems.

Palaeozoic age (541Ma to 252Ma) VHMS deposits represent the majority of Australian VHMS deposits, and are concentrated in the rocks of Cambro-Ordovician age (541Ma to 443Ma) in the Mount Windsor Volcanics (Queensland) and the Mount Read Volcanics (Tasmania). There are a wide range in variability of styles of Australian VHMS deposits including mounds, pipes, sheets layered deposits, stacked deposits, stockwork and disseminated deposits, distal reworked deposits and cyclic layered deposits (Large, 1992).

 

Cross Section of Typical Mound Style VHMS deposit, after Hannington et al. (1998)

The schematic diagram represents a classic cross section of a VHMS deposit, with concordant semi-massive to massive lens underlain by a discordant stockwork vein system (feeder zone) and associated alteration halo or pipe (Galley et al, 2007)

The major deposit size can range from 15-90Mt with a median deposit size of 1-5Mt, with an average grade for Cu-Pb-Zn deposits of 1% Cu, 5% Pb and 12% Zn with high silver and gold credits, with an average grade of 120 g/t Ag and 2g/t Au (Gemmell et al, 1998).

 

Franklin, J.M., Gibson, H.L., Jonasson, I.R., and Galley A.G., 2005, Volcanogenic massive sulfide deposits: Economic Geology 100th Anniversary Volume, p. 523-560

Galley, A.G., Hannington, M.D., and Jonasson, I.R., 2007, Volcanogenic massive sulphide deposits, in Goodfellow, W.D., ed., Mineral Deposits of Canada: A Synthesis of Major Deposit-Types, District Metallogeny, the Evolution of Geological Provinces, and Exploration Methods: Geological Association of Canada, Mineral Deposits Division, Special Publication No. 5, p. 141-161.

Gemmell, J.B., Large, R.R., and Zhaw, K., 1998, Palaeozoic volcanic-hosted massive sulphide deposits: AGSO Journal of Australia Geology and Geophysics, 17(4), p. 129-137

Hannington, M.D., Galley, A.G., Herzig, P.M., and Petersen, S., 1998, Comparison of the TAG mound and stockwork complex with Cyprus type massive sulfide deposits: Proceedings of the Ocean Drilling Program, Scientific Results Volume 158, College Station, TX, p. 389-415

Large, R.R., 1992, Australian volcanic-hosted massive sulfide deposits: Features, styles, and genetic models: Economic Geology, v. 87, p. 469-968