Among the highlights, Regulus intercepted 714m at 1.02% copper-equivalent, namely 0.68% copper, 0.38g/t gold and 7.6g/t silver.

It also hit 396m at 1.05% CuEq and 137m at 3.75% CuEq.

Chief geological officer Dr Kevin Heather said there were indications of a mineralising event that was typical of those found in the peripheral portions of porphyry copper deposits.

"Not only are we seeing some of the best drill results and continuity of mineralisation on the project to date, but we are also encountering strong indications of a post-skarn, pre-high-sulphidation, phyllic alteration event with associated strong chalcopyrite-pyrite mineralisation locally with bornite," he said.

The results are from drill holes on Regulus' concessions in the ongoing resource expansion programme being done in collaboration with Compañía Minera Coimolache SA which operates the Tantahuatay gold mine to the south.

The drilling highlights were within the footprint of AntaKori's inferred 294.8 million tonne resource grading 0.48% copper, 0.36g/t gold and 10.2g/t silver.

Regulus had just over C$617,000 in working capital at the end of March and said in May management was evaluating a future financing to fund AntaKori's drilling programme proposed to the end of the year.

Regulus last month said its significant shareholder Route One Investment Company had committed to a US$30 million equity financing for Regulus' proposed Argentine spin-out, Aldebaran Resources.

Its shares closed up 8.8% yesterday to C$2.10.