Valor said the above result was recalculated by the SGS lab in Lima after a mistake in the delivery of previous results, which had put the BER288 intercept at just 32m with lower copper and zinc but higher silver and similar manganese results.

"(It) is an extraordinary drill hole and it reinforces the quality of our follow-up drill targets in the western zone of the deposit," chairman Mark Sumner said today.

Valor last week announced a 44% increase in Berenguela's total indicated resources, including a maiden zinc resource, taking the total resource to 25.53 million tonnes at 1.716% copper-equivalent.

Last month, among the company's "unprecedented" assay results was a 3m interval so mineral-rich it exceeded the 4,000g/t silver limits of the assay lab's test capabilities.

The company expected its ongoing drilling programme to continue to confirm and upgrade the existing resource and pave the way for expansion drilling.

Shares in the company were down about 6% in late trade to A$0.3, capitalising it around $46.5 million.