Drilling at the newly named Cannonball prospect intersected 3m at 3.42% nickel, 1585 parts per million copper and 1077 parts per billion platinum group elements, including 1m at 5.83% nickel from 62m.
An adjacent hole hit 5m at 1.35% nickel, 1121ppm copper and 1214ppb PGE from 81m.
The prospect has been defined over a 1km strike length, based on a geochemical anomaly, and lies along the same ultramafic unit that hosts the Camelwood discovery, 500m to the north.
The company said Cannonball would be a high-priority drilling target.
Rox also had success at other targets at Fisher East, with nickel, copper and PGE intersected at the Emu Bush North, Emu Bush Central, Emu Bush South, Twinleaf and Red Mulga prospects.
Emu Bush North also returned a gold hit of 1.74 grams per tonne.
Rox managing director Ian Mulholland said the number of targets identified bode well for the chance of further nickel sulphide discoveries.
“Some of the targets show similar or even higher values compared to our initial RAB drilling results that resulted in the Camelwood discovery, particularly Cannonball, where the new discovery of massive nickel sulphides is very exciting,” he said.
“The anomalies also show elevated levels of copper, platinum, palladium and gold, which indicate a magmatic source for the nickel.”
Drilling will resume as soon as possible, pending rig availability.
Shares in Rox gained more than 6% to A3.4c after earlier reaching a high of 3.9c.