NSW Greens MPs arrested at Adani protest

NSW Greens MPs Jeremy Buckingham and Dawn Walker have been arrested at a blockade in Queensland protesting the Adani Carmichael coal mine.

The pair was among 17 people arrested on Wednesday morning for trespassing at the proposed site of the controversial mine, 270 kilometres west of Bowen, according to Queensland Police.

A group of more than 30 protesters blockaded a rail construction site near the proposed mine, with many climbing on top of vehicles, police said.

Another woman locked herself onto a gate at the site, according to police, who are still working to remove the lock from her neck.

Mr Buckingham and Ms Walker were each issued with a police infringement notice for trespassing unlawfully at a place of business and fined $252.

Mr Buckingham said while several people were arrested and taken into custody, police worked with "professionalism and a high level of care".

"I was just told I was under arrest," Mr Buckingham told AAP following the incident.

"The officer just placed his hand on me and said 'you are under arrest, move to the side of the site'."

Mr Buckingham, who has been in Queensland for four days, says he intends to stay in the region until at least Friday, talking to farmers and traditional landowners near the proposed coal mine in the Galilee Basin.

He said he would travel to the Great Barrier Reef to observe coral bleaching on Thursday.