Junior explorer Twenty Seven Co has unveiled a slew of gold-in-soil geochemical anomalies at its Yarbu gold project, 160km northeast of Southern Cross in Western Australia.
The company’s latest round of auger drilling has confirmed three previous anomalies etched out from last year’s auger program along with highlighting a new target area with samples grading up to 92.7 parts per billion gold.
Following on from the company’s maiden auger drill blitz across its 223 square kilometre project, Twenty Seven plumbed an additional 348 drill holes for 535 metres into its largely under-explored tenure. The latest round of auger drilling was designed to hit priority targets and infill anomalies detected in last year’s exploration.
A total of 331 samples were sent to Lab West in Perth for analysis using low-level UltraFine fraction techniques.
Assay results from the latest auger program confirmed, and further refined, the three gold-in-soil anomalies delineated last year with results of up to 164 parts per billion gold.
At Area 1, the company reported infill auger drilling has narrowed in on a gold anomaly, with coincident zinc and molybdenum anomalism, extending across an area of 1400m by 700m primed for future air core drill testing.
Additionally, management says Area 2, in conjunction with the nearby Area 3 zone, lies adjacent to the historical Clampton North prospect identified via a 1000m-by-200m auger gold anomaly.
The mineralisation in the adjacent tenement is believed by the company to be associated with the Area 2 anomaly.
Intriguingly, significant historical intercepts including 16m at 3.09 grams per tonne gold from 88m with a richer interval of 10m at 4.44g/t gold from 90m are also reported to the south of Area 3 in an adjoining licence.
Recent reprocessing of aerial geophysical surveys by Twenty Seven indicate the central portion of Areas 2 and 3 appear to be associated with the limbs and hinge zone of at least two major folds.
Tipping into the trifecta of high priority gold targets is an additional discrete gold target – Area 4 – the company has carved out towards the north of its tenement package. The newly-defined gold anomaly has returned assay values up to 92.7ppb gold and is coincident with elevated arsenic, lead and zinc.
Twenty Seven Co Non-Executive Chairman Rohan Dalziell said: “This latest auger campaign confirms gold mineralisation across the three broad areas within the Yarbu Project and has tightened the area of gold-in-soil anomalism identified in 2021. This allows our technical team to accurately review and confidently plan drilling programs with the aim of identifying further gold mineralisation at depth.”
The 100 per cent owned Yarbu tenure lies adjacent to Ramelius Resources’ Marda ground where the mid-tier Australian gold miner is mining 1.8-to-2 g/t dirt for trucking to its 2.7 million tonne per annum Edna May plant near Westonia. Ramelius acquired the 5.3 million tonne resource grading 1.96 grams per tonne gold for $13 million in cash in 2018.
Twenty Seven Co has more than one iron in the fire as it contemplates its next move at Yarbu. The company says it is assessing options for its proximal Mt Dimer project to the southeast that also lies in the same greenstone belt and is also awaiting final multi-element results from its Rover gold project, west of Leonora where recent RC drilling confirmed shallow gold mineralisation.
Add into the mix a farm-in agreement with mining heavyweight Rio Tinto to explore for non-gold minerals at its North Rover project and things could get interesting very quickly for the junior explorer.
Is your ASX-listed company doing something interesting? Contact: matt.birney@businessnews.com.au
14 Oct 2026
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