Major polymetallic discovery expands potential of Batu Perak prospect: Robust
Tuesday, October 15 2013 - 06:03 AM WIB
ASX-listed Robust Resources Limited announced on Tuesday assay results from diamond drill hole LWD 358 at the Batu Perak prospect within the Lakuwahi Caldera prospect on Romang Island.
The company said in a statement that LWD 358 was drilled as part of a series of holes designed to explore the extensive stratabound Volcanogenic Massive Sulphide (VMS) target at Batu Perak. The hole encountered a large and strongly mineralized polymetallic breccia, at least 160 meters thick. The hole has an upper silver-rich cap, and deeper in the hole there are gold and base metal rich zones.
The polymetallic breccia is located 250 meters to the south-east of the VMS system, and the expected geological relationship between the two will be determined through follow-up drilling.
The LWD 358 hole represents another very significant intersection on Romang Island and also features mineralization that started at shallow depth of 6.3 meters and ended in mineralization at a final depth of 166.7 meters. The breccia zone is open substantially in all lateral directions and at depth.
The results from LWD 358 include:
* 160.4m at 1.22 g/t AuEq1 and 2.3% combined base metals from 6.3m
(0.61 g/t Au, 32 g/t Ag, 0.10% Cu, 1.25% Pb, 0.96% Zn) including silver-rich zone:
* 13m at 5.02 g/t AuEq and 1.42% combined base metals from 22m
(0.69 g/t Au, 229 g/t Ag, 0.03% Cu, 1.36% Pb, 0.03% Zn) and including gold-rich zone
* 22m at 1.89 g/t AuEq and 4.04% combined base metals from 65m
(1.10 g/t Au, 42 g/t Ag, 0.21% Cu, 2.43% Pb, 1.39% Zn)
Robust?s Managing Director Gary Lewis commented: ?Hole LWD 358 is one of the most significant intersections encountered to date within the Lakuwahi Caldera prospect. The current interpretation is that it is part of the feeder system for the exhalative VMS-style mineralisation currently being explored at Batu Perak.
The continuous grades over a very long interval means that this breccia is a new target in itself with significant discovery potential.
Editing by Reiner Simanjuntak