All seven drill-holes completed in the campaign so far have appeared to intersect copper mineralisation
Castillo Copper (LON:CCZ), the metal explorer focused on copper across Australia and Zambia, on Thursday reported significant copper mineralisation from drilling at its Big One Deposit in the Mt Isa copper-belt district of north-west Queensland.
The company said its latest drill holes (BO_318-21RC) complement the results announced on 29 June 2021 (BO_315-317RC).
Highlights
- Drill-hole BO_318RC intersected significant visible copper mineralisation in two distinctive zones – 11m from 89-100m and 34m from 153-187m (apparent thickness)
- Massive copper sulphide mineralisation clearly observed (chalcopyrite and chalcocite)
- All seven drill-holes completed in the campaign so far have appeared, through visual inspection, to intersect copper mineralisation – the best intercepts are shown in Figure 1 below:
Figure 1: Best Intercepted Mineralisation
| Borehole | From (m) | To (m) | Apparent Thickness (m) |
| BO_318RC | 89.0 | 100.0 | 11.0 |
| BO_318RC | 153.0 | 187.0 | 34.0 |
| BO_319RC | 55.0 | 64.0 | 9.0 |
| BO_321RC | 63.0 | 72.0 | 9.0 |
| BO_315RC1 | 61.0 | 69.0 | 8.0 |
| BO_316RC1 | 113.0 | 120.0 | 7.0 |
| BO_316RC1 | 129.0 | 146.5 | 17.5 |
| BO_317RC1 | 90.5 | 103.0 | 12.5 |
By reconciling these new data points with the geological modelling completed to date, Castillo Copper has clearly verified material extensions to known mineralisation and potentially a larger underlying system then initially envisaged.
A key feature behind the success of the current campaign, according to the copper miner, has been the significantly improved targeting, resulting from the effective utilisation of geophysical insights to refine and reshape the drilling programme to boost the collective exploration potential.
All samples from drill-holes BO_318-21RC are currently with the laboratory for analysis, while results
from BO_315-317RC are expected to be received imminently.
Simon Paull, Managing Director of Castillo Copper, said: “Hitting copper mineralisation seven times from
seven starts is an outstanding way to progress the drilling campaign at the Big One Deposit. In particular, the result from drill-hole 318RC is excellent, throwing off two zones of visible mineralisation totalling 45m, and confirms massive copper sulphides are apparent.”
“These intercepts provide clear evidence that known copper mineralisation has been materially extended and that the underlying system could potentially be larger than initially envisaged. With a further 19 drill holes still to come, the Board is delighted with progress to date and looks forward to releasing interpreted insights from upcoming assays results.”
 reported significant copper mineralisation from drilling at its Big One Deposit in the Mt Isa copper-belt district of north-west Queensland.){kind=link}