Robust Resources encounters further good drilling news
THE DRILL SERGEANT: Robust Resources (ASX: ROL) has received assay results for two further diamond drill holes recently carried out on the company’s Purple Heart prospect situated within the Lakuwahi Caldera on Romang Island in Indonesia.
The latest results have followed on from earlier work at Purple Heart, with both holes intersecting gold, silver and base metal mineralisation.
Robust has now completed 16 holes at Batu Perak including 10 at Purple Heart that have all intersected gold-silver mineralisation, some also with base metal values.
Geology Map of the central Lakuwahi Caldera showing drilling and
location of LWD 324 and LWD 328 in relation to mineral resources and
targets. Source: Company announcement
The recent drilling followed a recognised pattern with the upper sections of drill hole LWD 324 demonstrating enhanced assays for gold and silver, whereas the lower section is pervasively mineralised in base metals, in particular lead, zinc and copper, but also demonstrating gold and silver.
Results from LWD 324 include:
51 metres at 1.49 grams per tonne gold equivalent (AuEq) and 1.94 per cent base metals (BM) from 0 metres (0.73g/t gold, 36g/t silver, 0.29 per cent copper, 0.84 per cent lead, and 0.80 per cent zinc.
Including:
14m at 1.76g/t AuEq and 1.14 per cent BM from 2m (1.01g/t gold, 35g/t silver, 0.34 per cent copper, 0.62 per cent lead, 0.18 per cent zinc);
13m at 1.82g/t AuEq and 4.24 per cent BM from 36m (0.65g/t gold, 55g/t silver, 0.53 per cent copper, 1.72 per cent lead, 1.99 per cent zinc).
Robust highlighted the intersection in LWD 324 saying it demonstrates the Purple Heart zone remains strongly mineralised at the northern-most limit of the current drilling pattern.
This, the company said, combined with the orientation of the mineralised outcrops and geophysical evidence, suggests there may be a continuous zone of mineralisation beneath thin limestone cover, between Purple Heart and Batu Mas.
The second of the most-recent holes, LWD 328 intersected an even thicker, 108m mineralised zone but at a lower average grade of 0.53g/t AuEq.
“Assay results continue to demonstrate that Romang Island has multiple structures with high mineralisation,” Robust Resources managing director Gary Lewis said in the company’s announcement to the Australian Securities Exchange.
“Hole LWD 324 is another example of this, and the thick zones of gold and silver-rich polymetallic mineralisation are now the focus of current metallurgical test work.
“This test work is aimed at a new concept of processing both oxide and sulphide ores through a sizeable flotation plant, conceivably achieving enhanced metal recoveries overall and a more economic outcome.
“Currently seven diamond drill rigs are operating within the Lakuwahi Caldera, drilling for high-grade base metals, precious metals and manganese.
“An eighth rig is to commence drilling shortly.”