Tri Origin cuts zone at Calarie

Drill tests on a target indicated by a deep-penetrating

induced-polarization (IP) survey have turned up a new gold zone at depth on the Calarie property in New South Wales.

Tri Origin Exploration (TOE-T), which is exploring the property jointly with Australian-listed Delta Gold, drilled six holes in its most recent phase of work — three over a 500-metre strike length near a known gold deposit and another three in an area 1-2 km north of the deposit. One of the holes to the north, CALDD-007, tested an anomaly delineated in an IP survey using the Quantec Consulting “Realsection” system.

In that hole, Tri Origin intersected an 8-metre zone of mineralization grading 0.68 gram gold per tonne, including a 3-metre interval that held 1.18 grams per tonne, centred about 147 metres down the hole. Three other holes also cut mineralization, with the best showing 8.2 grams gold over 1 metre.

Realsection, a 2-pass IP survey, starts with an orientation phase that determines the optimum depth for the survey to investigate; in the second pass, the survey crew chooses an IP array that will effectively penetrate to that depth. The results are mathematically modelled to provide resistivity and chargeability maps and sections that show these physical properties at their actual, rather than their apparent, depths below surface.

Mineralization at Calarie typically shows strong silicification, which increases the resistivity, and abundant disseminated sulphides, which increase chargeability. The combination of highly resistive and highly chargeable rock is a prime exploration target.

Calarie, in the Lachlan Fold Belt, about 300 km northwest of Sydney, is a former gold producer with a resource of 514,000 tonnes grading 2.2 grams gold per tonne, all of which exists at depths of fewer than 100 metres. The new zone confirms that there is gold mineralization deeper than previously tested.