Strong anomalous results delivered from preliminary soil auger drilling program across eight initial target areas at Chillagoe project.

A total of 466 shallow soil sample and associated rock chip samples were collected with the prospects tested featuring either extensive untested historic workings, multiple rock chips with anomalous gold, silver, copper and base metals, or magnetic anomalies suggesting pipe-like buried intrusions with no previously recorded exploration activities.

Thomson Resources Ltd (ASX: TMZ) confirmed it would plan additional reverse circulation (RC) at new target areas, following enhanced geological understanding at target locations within the project.

Findings from the drilling included 0.5 grams per tonne (g/t) gold in soils at Laverock as well as a rock chip with 16 g/t gold and 20 per cent copper. Two parallel long gold 700 metre anomalies were determined at Borderline with up to 0.3 g/t gold, 125 g/t silver and 2.5 per cent lead, with gold anomalies with magnetic targets were also found at Paradox and Pandanus.

Chillagoe Project

Thomson Resources identified eight target areas within the Chillagoe project, with drilling taking place through October and November 2020.

The prospects were selected from many occurrences across a 25km by 20km area. In general, the targeted deposit type was Intrusion Related Gold (IRG) in breccia pipes and/or intrusion related copper-gold lodes.

Holes were drilled using a tray back mounted soil auger at 20m intervals across mineralised trends or magnetic anomalies. The average depth of all 466 samples was 1.2m, which was shallower than expected and indicates limited dispersion of anomalies.

Gold, silver and copper targets revealed for Thomson Resources
Target areas identified by Thomson Resources at Chillagoe. Pic:Supplied

Results across the target areas

At Laverock, Thomson Resources detected a 1km long magnetic anomaly in the southern part of the area where four lines of auger sampling occurred. Copper mineralisation was visible within a shallow pit at the end of one of the lines with a rock chip assay returning results of 16.0 g/t gold, 64 g/t silver, 20 per cent copper and small traces of tungsten (0.4pc). Anomalies occurred on all four soil sampling lines with up to 75 ppb gold, 1.5 per cent copper and 0.5 per cent bismuth.

Two parallel gold anomalies were discovered within the Borderline target area with a single best discovery of 0.3g/t gold, 125 g/t silver, 2.5 per cent lead and 1 per cent antimony in the eastern lode. Within the western lode, four main costeans were trenched.

Soil sampling at Paradox by Thomson returned gold anomalies on all three lines over the magnetic target with up to 35 parts per billion (ppb) gold. On the flank of the magnetic anomaly, two other samples returned anomalous lead (0.3pc) and zinc (0.2pc).

Soil testing intersected gold anomalies at other locations, including an extension to at least 400 metres at Salt Creek, with up to 55 ppb gold; anomalous gold up to 20 ppb across the centre of a high-resolution section at Pandanus; and 14 ppb discovered at Arizona.

Sampling was unable to be performed at the initial target point at West Ridge, while the magnetic targets at Welcome Creek returned weak findings and are unlikely to be further explored.

From the entire drilling program, across 466 sample collections, 31 were deemed to be highly anomalous, with a further 82 considered anomalous. From these results, Thomson Resources expects to add to the already planned drill targets during the upcoming dry season.


This article was developed in collaboration with Thomson Resources Limited, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.