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Gold Fields warns of rising costs as Iran's war increases input prices

South Africa's?Gold?Fields?expects that its costs will increase, as the Iran War has pushed up prices for inputs like fuel and explosives. The forecast impact, assuming $100 oil per barrel on a portfolio basis, is between 40 and $50 per ounce, it said.

Gold Fields has not changed its cost guidance for this year. However, it says that measures such as fuel-efficient and high-capacity transport systems? at its mines should contain costs.

Diesel, the company's biggest cost, has increased by as much as 70%. Freight costs rose by 40%, and the price of liquefied gas, used to power Gold Fields' remote mining operations in Western Australia at sites like Agnew Mine, jumped 30%.

Costs of cyanide and explosives are also rising

The cost of explosives, as well as cyanide (a chemical made from natural gas or petrochemical feedstocks) used for gold processing has also increased by 10%. The price of international crude futures LCOc1 reached a high of around $126 by the end April after the U.S. launched airstrikes against Iran on February 28. This triggered a wider conflict, resulting in an unprecedented disruption of energy supplies.

The price of oil fell below $100 per barrel on Thursday as U.S. president Donald Trump?talked about the prospects for peace. However, it remains much higher than at the beginning of the year.

Gold prices have fluctuated and are now around $4,744 per ounce. They reached a high of $5,595 at the end January. The miner produced about 633,000 ounces during the first quarter 2026. This is 15% more than the same period in 2015.

Gold Fields anticipates producing between 2.4 and 2.6 millions ounces in 2026. Nelson Banya reported; Barbara Lewis edited.

(source: Reuters)