The Overflow Mine operated during the turn of the century, mining gold, silver and lead ore. Its mining history together with the region’s geology underscores the project’s excellent potential for base and precious metals.
In the past, the property was held in a joint venture with Triako Resources Ltd (Triako) prior to its takeover by CBH Resources Ltd. An exploration priority of Triako was the delineation of additional mill feed for its nearby Mineral Hill Mine prior to the mine’s closure.
Previously reported results from Triako’s drilling include:
- TBB001 : 5 metres @ 7.61 g/t Au, 36 g/t Ag, 0.12% Cu, 2.24% Pb and 5.10% Zn
- TBB008 : 10 metres @ 5 g/t Au, 16 g/t Ag, 0.20% Cu, 1.00% Pb and 1.40% Zn.
The Overflow Project is located 180 kilometres west of Dubbo, NSW, and 40 kilometres north of the previously producing Mineral Hill Mine (held by CBH Resources Ltd).
It is adjacent to the Cobar Basin, one of Australia’s most significant mining districts having produced metal valued at several billion dollars or more at today’s prices.
Tri Origin is taking a longer term view of the opportunities at Overflow, with a focus on greenfield opportunities associated with extensive geochemical anomalism, and related geophysical targets.
Relatively shallow drilling conducted by previous explorers in the 1970s and ‘80’s at several of these targets has identified numerous zones of elevated lead, zinc, copper, silver and gold in oxidised ferruginous material, such as drill hole BOBP9 drilled by Amoco Minerals in 1982 which returned 10 m @ 0.14% Cu, 0.77% Pb, 0.2% Zn and 7g/t Au from surface.
Tri Origin believes these targets have the potential to host significant mineralisation at depth similar to other large deposits in the Cobar Basin. A general characteristic of Cobar-type deposits is a small surface footprint, strong vertical continuity and a depleted-leached ferruginous to gossanous zone above primary sulphide mineralisation.
Source: NSW DPI Image Library