Robust: Base metals intersected at Perak Basin greatly enhances VMS potential
Tuesday, October 29 2013 - 02:05 AM WIB
ASX-listed Robust Resources Limited announced Tuesday the assay results from diamond drill hole LWD 370 which is the latest to be completed in a series of highly successful drill holes undertaken at the Perak Basin VMS target on Romang Island.
The precious and base mineralization intersected in LWD 370 is the most significant to date, and gives Robust further confidence that the Perak Basin may host a large VMS- style deposit.
Gold grades are nearly three times higher than any previous intersection, the company said in a statement. Silver and base metals values are also strong and occur over substantial thicknesses.
Results from LWD 370 are as follows:
-50.3m at 3.37 g/t AuEq1 and 3.91% combined base metals from 78.8 m (1.41 g/t Au, 104 g/t Ag, 0.18% Cu, 1.88% Pb, 1.85% Zn) including:
- 22 m at 6.28 g/t AuEq and 5.79% combined base metals from 98m (2.59g/t Au, 195g/t Ag, 0.26 % Cu, 2.90 % Pb, 2.63% Zn) and including high-grade zone
- 9m at 8.44 g/t AuEq and 9.56% combined base metals from 111m (4.34 g/t Au, 217 g/t Ag, 0.34 % Cu, 4.84% Pb, 4.38 % Zn)
The importance of these results lies not only in the high grades intersected, but the fact that LWD 370 is a substantial south-east step-out-distance (200 meters) from the initial discovery drill section, and the hole is located in a central position within the Perak Basin, Robust said.
This result supports the technical team?s view that a large proportion of the Perak Basin contains an extensive and highly mineralized, stratabound mineralized horizon, the company said.
In addition, the trend is thickening and increasing in grade in the central parts of the Basin. Company geologists now interpret the deep resistivity anomaly located near the center of the Perak Basin to be an important feeder structure for the introduction of ore-forming fluids into the basin environment during the genesis of the mineral deposits approximately 1 million years ago. It is also thought that this feeder structure is a valid exploration target in its own right and is postulated to have potential for high-grade massive sulphide deposits such as those found deeper beneath the Batu Mas deposit.
Robust?s Managing Director Gary Lewis commented: ?Robust?s exploration activities in the Perak Basin continue to improve, and our technical team believes the results from LWD 370 represent some of the most important assay results received since we commenced exploration on Romang Island in 2008.
?Given the exploration success we have had at the Perak Basin polymetallic deposit, a fourth diamond drill rig is being reprioritized and remobilized to work on definition drilling of the mineral deposits. A significant amount of drilling is required to fully exp lore and define this exciting target.
?This reprioritization is necessary so we can complete as much drilling as possible before the deadline for data finalization for the mineral resource estimation work, which will be completed to JORC Code (2012) standards by independent consultants Mining Associates Pty Ltd. The Resource Estimate is planned to be finalized early in 2014.
?This week Robust will reach a new milestone in its work on Romang Island when 40,000 meters of high-quality diamond drilling will have been completed by the Company?s owner-operated fleet of rigs.?
Editing by Reiner Simanjuntak