Brazilian Critical Minerals (ASX:BCM) yielded "strong" ion exchange leaching responses to magnesium sulfate with the leach results received from its extensional drilling campaign last year at the Ema project in Brazil, according to a Friday filing with the Australian bourse.

The company reported 58 intercepts within the mineralized horizon, resulting in average recoveries of 48% total rare earth oxide and 62% magnet rare earth oxide, the filing said.

The bankable feasibility study is slated for release within the month, per the filing.

Shares rose 5% in midday trade on Friday.