Federal Resource Minister Martin Ferguson is back in Perth and this time he appears not ready to pick a fight with resources companies as he announced on Friday that the federal government has opened its doors on more inputs about the much-disputed minerals resource rent tax (MRRT).

Mr Ferguson said that the government is all set to conduct dialogues with mining firms and listen to their concerns as he and members of the Policy Committee set foot anew in Perth where meetings were held between him, mining interest groups and individual companies.

The Resource Minister is making sure that the strife that marred his earlier talks with mining executives would not be replicated which arose as smaller firms complained of the government's alleged selective deal with giant mining players such as BHP Billiton, Rio Tinto and Xstrata.

Junior miners were protesting that the federal government's decision to tax only coal and iron ore would benefit the already established giant mining companies.

The smaller mining companies also want the government to reconsider its $50 million mark from which point the proposed mining tax would take effect.

Mr Ferguson said that all the inputs put forward so far would be seriously studied by the government as he clarified that the government is not promising any specifics that would address such concerns, stressing that "the government has announced its basic parameters."

He reiterated that the policy group has been created to execute the parameters of the mining tax as he acknowledged that issues have been raised against the $50 million threshold though he reminded that "in terms of our consideration that's a matter we'll have to discuss in due course with the Treasurer."

On another front of the mining tax's complex issues, magnetite miners urged the federal government to consider exempting the segment from the tax proposal as the magnetite network executive director Megan Anwyl called into attention the fact that the value of magnetite ore is too low to be taxed.

Ms Anwyl argued that magnetite should be included in the exemption list as she pointed out that "there's very little value to magnetite ore as it comes out of the ground and it's only after the very expensive, intense processing that it acquires some value."