Mineral Resources (ASX:MIN) reported ore reserves at its Onslow Iron project of 359 million tonnes at 57.5% iron as of March 31, up 73% from 207 million tonnes as of June 2023, according to a Wednesday filing with the Australian bourse.

The project's mineral resource was 743.7 million tonnes at 56.3% iron, up from 394 million tonnes, the filing said.