Adani Australia mining chief executive Lucas Dow on Thursday announced the scaled-back project would be "100 per cent financed" from within the Adani conglomerate.

Ms Palaszczuk said the announcement was "very different to what we have been seeing" and she wanted more details.

"There is no taxpayers' money going into the building of that railway line, they have to have agreements with Aurizon, we haven't seen any of that evidence as of yet," she told the ABC on Friday morning.

"And, of course, we will believe it when we see it."

Ms Palaszczuk said the success of Adani's project would depend on whether the company met its milestones.

"We've got a lot of companies that come and say we've got finance to begin things and it doesn't happen," she said.

"I will believe it when it starts happening."

Adani was previously seeking a $1 billion taxpayer loan from the Northern Australia Infrastructure Facility to finance a 388-kilometre rail line needed to move its coal to port for export.

However, Ms Palaszczuk announced she would veto the NAIF loan during the state election campaign.

In September, Adani announced it would save $1.5 billion by scaling down the rail line. It will now build a shorter narrow gauge line to connect with Aurizon's existing rail plans.

Speaking from Gladstone, Resources Minister Matt Canavan said Adani's investment plans were fantastic news for the region.

"It's still, here in central and north Queensland, difficult economic times, the unemployment rate in this region is 6.8 per cent over the last 12 months and that's well above the national average," he said.

"What this region needs is jobs and it needs big investments like this.

"My hope now is that we can all work together to create these jobs, deliver this opportunity."

Senator Canavan said it was the first of six mines that might go ahead in the Galilee Basin.

"All together they could deliver 15,000 jobs in central and north Queensland and deliver opportunities for decades," he said.

"Adani have said they've got the money and it's up to governments now to come together and support investment in our state.

"There' no public money going towards this, so the project has been improved and gone through all of the processes, in fact it's probably been the most assessed project in our nation's history.

"It's gone through 12 court cases, all of them they've won."

On Twitter, Mr Canavan described Adani, which has its headquarters in India, as a "little Aussie battler" that "just keeps chugging along".

In response, Greens senator Larissa Waters tweeted: "Is this satire? Or is your government deaf to irony as well as science?"

Senator Waters said there was still time to stop Adani's Galilee Basin mine.

"It's no surprise they've announced that they're going to fund their own mine; it's because no one else will actually give them any money," she said.

Greens MP Michael Berkman said Labor had issued the environmental approval and mining leases and set up a royalties deal.

"We are so far beyond the point of being able to accept Labor's 'we'll believe it when we see it' kind of approach," he said.

However, Conservative Party Senate candidate Lyle Shelton welcomed the news Adani's coal mine would start construction.

"This is terrific news for the Queensland economy," he said.

Queensland Resources Council chief executive Ian Macfarlane said the investment in the project was a sign of the strength of the state's resources sector.

"In recently months Adani has made sensible revisions to the project to ensure it can get underway as soon as possible, including a scale up to capacity and a decision to use common narrow gauge infrastructure," he said.

"Today's announcement will be an economic kickstart for all of central and north Queensland, in particular for Rockhampton and Townsville where most of the jobs will be created."