OceanaGold, owner of a New Zealand mine, says a worker at its Didipio project in the northern Philippines has died following a severe storm.
The man was a Filipino national and an employee of one of Oceana's mining contractors.
Oceana said it and the contractor were investigating the man's death.
"We are extremely saddened by this tragic event," chief executive Mick Wilkes said in a statement.
"Steps are being taken to ensure similar incidents do not occur again."
The Didipio project is currently being built and due to be completed in the final quarter of 2012.
Oceana said this week that project costs had blown out by 19 per cent to A$220 million ($284 million).
The mine will initially have a 16-year life and is expected to produce 100,000 ounces of gold and 140,000 ounces of copper a year.
Oceana is ASX-listed and currently only produces in New Zealand, with its shares up 2.5 cents to A$1.915.