Lynas Corporation has hit a stumbling block in its plan to export 33,000 tonnes of rare earths concentrate through Fremantle Port each year, in the form of independent MLA Adele Carles.

Ms Carles is calling on the state government to stop Lynas’ plan, which involves trucking the concentrate around 1,000 kilometres from its Mt Weld mine, near Laverton, to Fremantle for shipping to its processing plant in Malaysia, which is currently under construction.