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Twenty Seven Co assay reviews confirm large gold anomalism extensions at Rover

The next reverse circulation drilling campaign will test prioritised targets within newly identified anomalous zones.

Twenty Seven Co Ltd -
A new phase of auger drilling is underway in covered areas to the west of the Harmonic and Creasy 1 prospects

Twenty Seven Co Ltd (ASX:TSC) has completed a comprehensive review of all assay results from recent auger drilling and soil sampling campaigns that confirms large gold anomalism extensions at the Rover Project in Western Australia.

Significantly, the Harmonic prospect target area has been tripled to around 650 metres through the discovery in a geochemical campaign of a 1.77 g/t gold rock chip that is around 400 metres to the northwest of the nearest RC drill-holes.

The focus of geochemical campaigns included the Harmonic, Creasy 3, Red Bush and Mistletoe prospects, coupled with the Maynard Intrusion target, which are all along the 20-kilometre prospective gold strike on the Maynard Hills greenstone belt.

Notable outcomes

Apart from Harmonic, other notable outcomes of the program include:

  • The Red Bush gold in soil anomaly is a strong 600-metre long anomaly, supported by rock-chips up to 0.6 g/t and just north of drill-hole 20RVRC045 which intersected 1-metre at 0.97 g/t;
  • In the Southern Red Bush area around 2.2 kilometres of semi-continuous zone of gold anomalism was identified in soils;
  • A gold in soil anomaly northwest of the Mistletoe prospect is identified with rock chips of up to 0.17 g/t in gossanous banded iron formation (BIF); and
  • The Maynard Intrusion gold in soil anomaly is coincident with an interpreted 'sweet spot' for potential high fluid flow and gold deposition at the southern end of the intrusion.

“Exceeded expectations”

Chief executive officer Ian Warland said: “The assay results from the recent geochemical campaigns have exceeded our expectations, with five significant outcomes that extend anomalous zones and deliver exciting new gold targets.

“Pleasingly, this continues to fill our forward development pipeline with high-quality gold targets along the extensive Maynard Hill greenstone belt.

“Encouragingly, the latest assays covering the Maynard Intrusion target are especially exciting due to the validation of TSC’s model of a highly favourable structural trap site or sweet spot for gold deposition.

“Moving forward, we have extended the auger drilling to test new areas around the Creasy 1 and Harmonic prospects, which are highly prospective for gold mineralisation.”

Overview plan of geochemical program

Regional soil sampling

During July 2020, soil sampling and shallow auger drilling was conducted on east-west orientated lines 400 metres to 100 metres apart, with samples collected along-line spacings of 50 metres to 25 metres (closer spaced samples were collected over areas of confirmed interest).

In general, the auger sample assay results are lower when compared to the soil samples, which is likely due to increased dilution of the sample from the auger process.

However, the auger sampling has proved very useful in areas with shallow cover.

Next steps

  • Auger drilling is taking place to the west of Creasy 1 and Harmonic in areas under thick sand cover; and
  • Finalise drill preparations ahead of next phase of drilling at Creasy 1, Harmonic and the new gold targets.

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