A headline hit of 4.7m grading 19.5% zinc, 7.8% lead, 466 grams per tonne silver, 6.9gpt gold and 1.5% copper was reported - equating to for 49.7% zinc-equivalent - from the Dry Creek deposit, part of the ASX-listed company's Red Mountain project.
The Dry Creek and West Tundra deposits have a resource base of 16.7Mt grading 8.9% zinc equivalent, with drilling now testing for extensions.
Two of the recent holes have been completed and will be assayed in the coming weeks, while another hole is currently underway.
White Rock also plans to drill regionally in the current field season.
White Rock started the June quarter with A$1.8 million cash and raised $2 million from issuing new shares at the end of April.
Shares in White Rock were unchanged at 0.9c in late trade, after earlier hitting 1c, capitalising the company at $11.3 million.