The world’s biggest iron ore miners will be able to withstand the expected plunge in prices because their race to cut production costs has dramatically lowered the industry’s margin pressure point, allowing them to keep fueling a cash juggernaut that’s revived the mining sector. More than 90 percent of producers in the global seaborne market can generate profits at a benchmark price of $60 a metric ton, Adrian Doyle, a Sydney-based senior consultant at researcher CRU Group, said by phone.