Twenty Seven Co Ltd (ASX:TSC) (FRA:U9V) is set to start auger drilling at the 100%-owned Yarbu Gold Project, around 160 kilometres northeast of Southern Cross and about 90 kilometres northwest of TSC’s Mt Dimer Project in Western Australia.
The company has appointed Kalgoorlie-based drilling contractor Gyro Australia to undertake the campaign comprising around 660 holes using a low impact Landcruiser-mounted auger drilling rig to test bedrock geochemical signatures.
Drilling will comprise shallow 2-3 metres deep auger soil sample drill holes, depending on penetration depths, across the tenement package.
Maiden exploration campaign
Twenty Seven CEO Simon Philips said: “We are looking forward to getting our maiden exploration campaign underway at Yarbu, an area which we believe has the potential to host multiple structural gold targets.
“Auger drilling provides us with a low-cost, yet highly effective means to test several encouraging areas within Yarbu that have been detected during the recent reprocessing of geophysical data.
“Data from this auger program will be used to generate and prioritise follow-up drill targets.
“Yarbu forms a key part of our 22 kilometres strike along the highly prospective Clampton Fault which is known to host significant gold mineralisation and remains largely underexplored by modern techniques.
“Our team has worked hard to secure a strong foothold within this highly prospective region within the WA Goldfields and we look forward to advancing our systematic exploration programs over the coming months.”
Historical soil geochemistry
TSC’s geological staff have been collating and reviewing historical soil geochemistry which shows Yarbu has a complex geological structural history and confirms the presence of favourable structural settings within the tenement package.
Historical geochemical samples mainly comprise auger sampling which was tested only for limited geochemical elements, and at much higher detection limits compared to what is now available at commercial labs.
The company will use a low detection limit assaying technique which produces results on a full suite of elements and this is expected to provide new insights into potentially masked mineralisation at depth.
Two-pronged drilling approach
Drilling is designed on a two-pronged approach - firstly, to identify elemental alteration halos within the tenement, which can be seen from historical geochemical sampling, and secondly to test newly discerned fold structures identified from TSC’s reprocessing of the regional geophysics.
The company has designed an 800 metres x 400 metres grid pattern, which will give maximum coverage of the tenements and minimum spacing to identify geochemical alteration halos.
Next steps
Planned activities at Yarbu include the following:
- Starting of auger drilling campaign this month;
- Compilation of all historical soil data into a single database, which will provide the geological team with unparalleled insight into the geochemical signature of known mineralisation around the Yarbu tenements and coupled with the new geochemical data, will unlock further details; and
- Modelling of drilling data and planning for further activities which may include further infill drilling.
Further work programs designed to test other priority targets within TSC’s portfolio are being finalised and details will be announced shortly.