Robust reports high grade polymetallic assays from Perak Basin drilling

By Ruli Setiawan

ASX-listed Robust Resources Limited announced Wednesday the completion of 9 holes from recent exploration drilling of the Perak Basin on its Romang Island project in Indonesia?s Maluku Provice.

Of particular note are several high grade intersections of the Barite Exhalative (BEX), a sub-horizontal mineralized zone rich in barite, gold, silver and base metals which occurs over a large portion of the Perak Basin drilled so far, the company said in a statement.

The stand-out hole in the current set of results is LWD 429. This hole was drilled on the north-eastern margin of the basin and intersected high grades of gold, silver and base metals:
o 12.8m at 7.00 g/t AuEq and 8.86% combined base metals from 44.2m
(2.32 g/t Au, 248 g/t Ag, 0.42% Cu, 4.23% Pb, 4.21% Zn) including:
o 9.0m at 9.35 g/t AuEq and 11.63% combined base metals from 47.0m
(2.94 g/t Au, 340 g/t Ag, 0.58% Cu, 5.60% Pb, 5.45% Zn) including:
o 2.3m at 23.2 g/t AuEq and 29.7% combined base metals from 52.7m
(7.80 g/t Au, 819 g/t Ag, 1.00% Cu, 14.2% Pb, 14.5% Zn)

Individual assays from LWD 429 are particularly noteworthy
- 10.02 g/t Au
- 1,190 g/t Ag
- 6.0% Cu
- 50.9% BM (24.6% Pb, 24.8% Zn, 1.5% Cu)
- 40.6% Ba (calculated 69% Barite - BaSO4)

Geologically, LWD 429 consists of sulphide?rich and sulphide-poor BEX. The hole intersected the BEX mineralization 50 meters north-east of the high-grade ?white smoker? mineral previously announced in LWD 411 (7.4m at 4.75 g/t AuEq from 29.7m) thus demonstrating good continuity of high-grade mineralization.

On the opposite side of the Perak Basin, vertical hole LWD 428 intersected strongly mineralized BEX horizon, which overlies a feeder-system breccia, variably mineralized with base and precious metals, over 130 meters thick:
o 7.3m at 4.36 g/t AuEq and 5.66% combined base metals from 75.1m (BEX)
(0.37 g/t Au, 211 g/t Ag, 0.09% Cu, 2.29% Pb, 3.28% Zn) within a broader zone
o 137.5m at 1.06 g/t AuEq and 1.50% combined base metals from 74.0m (BEX + feeder)
(0.37 g/t Au, 40 g/t Ag, 0.06% Cu, 0.76% Pb, 0.68% Zn)

Robust?s Managing Director Gary Lewis commented: ?This is a particularly exciting development ? the emergence of a high-grade precious and base metal domain on the eastern side of the Perak Basin could have significant economic upside for the project.?

?Work on the island continues apace with 7 drills prioritized between the Mn Feasibility Study related drilling and the Perak Basin exploration and discovery program,? he added.

Although the main Lakuwahi Caldera mineral deposits, including Perak Basin, are no longer classified as forestry land and therefore do not require an access permit, other parts of our IUP licenses, particular North Romang, are still classified as the lowest grade production forest, he explained.

?Our forestry access permit has now been extended until 2015, which continues to allow us complete access to continue further exploration for the life of the current licenses. Our application for an exploitation permit is in the final stages of submissions and approvals and the important environmental study known as AMDAL has already been completed and accepted ? this will allow us to fully unlock the value of our assets on Romang Island through commercialization of the deposits.?

Editng by Reiner Simanjuntak