Twenty Seven Co Ltd (ASX:TSC) has returned high-grade assay results from 1-metre re-split samples at Harmonic prospect within the Rover Gold Project in WA with grades up to 1-metre at 8.1 g/t gold from 17 metres.
The samples were from previously reported 3-metre composites taken during a reverse circulation (RC) drilling campaign in October 2020.
Assay results have reinforced TSC’s emerging theme that there is large, shallow mineralised gold system across the Harmonic prospect.
Further, TSC’s geology team recently completed a soil geochemistry program on new tenement – E57/1134 – which is northwest of the Creasy-1 and Harmonic prospects.
“Encouraging gold system”
Chief executive officer Ian Warland said: “Assay results from the latest batch of 1-metre samples from Harmonic continues to build on an emerging discovery of a gold deposit exhibiting significant shallow mineralisation.
“Further, an encouraging gold intersection, in a previously untested region 180 metres to the northwest, indicates excellent potential to extend the deposit.
“Meanwhile, TSC's geology team has completed soil sampling over two priority targets on new tenement, E57/1134, which is around 14 kilometres northwest along strike from Harmonic and Creasy-1 along the continuation of the regional shear zone.
“We look forward to providing updates on the geochemistry results as soon as they are available.”
Previous broad gold zone intersected
Harmonic is around 300 metres to the northwest of Creasy-1 and contains gold mineralisation from surface.
Notably, mineralisation extends for around 200 metres along strike and remains open along strike.
In October, a broad zone of strongly anomalous gold was intersected around 180 metres to the north of the main body of mineralisation defined to date at Harmonic.
Moreover, 1-metre sample assays from drill-hole 20RVRC061 contain 14 metres at 0.3 g/t gold from 33 metres including 2 metres at 1 g/t gold from 33 metres, indicating the shear zone remains mineralised to the north.
Soil sampling campaign completed
TSC’s geology team have completed a large soil sampling campaign over two of the identified priority gold targets including:
- Four Corners – a 400-metre-long historical gold in soil anomaly contained within a broader zone of anomalous gold defined by nominal 200 by 50-metre grid completed by Golden Cross Resources in the mid-1990s; and
- Blue Hills - an area dominated by a prominent ridge of quartzite, with notable geological and structural similarities to the Harmonic and Creasy-1 prospects which are circa 4 kilometres southeast. Notably, the historical gold anomalies appear to be close to the mapped contact between quartzite in the east and mafic rocks to the west. This contact is very important at Harmonic and Creasy-1 because it controls the position of the regional shear zone and gold mineralisation.
The company has collected over 1,000 soil samples on east-west orientated 100-metre spaced lines at Four Corners and Blue Hills, with samples spaced at 50 metres along each line.
All samples have been submitted to the laboratory and results are expected later this month.
Ongoing exploration and next steps
Exploration at the Rover Project is continuing with the key activities over the short-term comprising:
- On receipt of soil sampling assays, interpretation of results for Four Corners and Blue Hills; and
- Assessment of final 1-metre re-split assays from Creasy-1 and Harmonic prospects.