Newcrest Mining is reviewing the future of some of its mines, as the recent plunge in the gold price continues to take a toll on the nation's fourth-biggest mineral export industry.

Newcrest was one of several ASX-listed goldminers to reveal March-quarter results on Tuesday, and the publication of production costs revealed that numerous mines across Australasia are unprofitable at current gold prices.

The gold price is hurting many miners. Credit:Arsineh Houspian

While Newcrest's biggest mines are low cost, its portfolio includes stakes in high-cost mines such as Papua New Guinea's Hidden Valley, which the company owns in partnership with Harmony Gold.

Tuesday's report revealed that ''all in'' costs for the mine were $2268 an ounce during the March quarter; drastically higher than the $US1410 that gold was fetching on Tuesday evening. Newcrest said a program to improve performance and ''assess the future'' of the mine was under way with ''considerable focus''.