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Industrial and Commercial Bank of China (ICBC) and China Construction Bank said in separate statements they were not working on the project, after media recently reported that Chinese banks may get involved.
Adani is seeking A$2 billion ($1.5 billion) in financing by March 2018 for the A$4 billion first stage of its proposed Carmichael coal mine in the state of Queensland, a project that has been shrunk from a A$16.5 billion plan to make it more viable.
Adani declined to comment on its financing plans on Monday or the statements from the Chinese banks.
Australian and overseas banks have balked at granting loans for the project, which environmentalists oppose due to climate change and the potential for damage to the Great Barrier Reef.
Industrial and Commercial Bank of China (ICBC) said on Sunday it has no intention of financing a controversial A$16.5 billion ($12.5 billion) Australian coal mine being built by Indian conglomerate Adani Enterprises.
"ICBC has not been, and does not intend to be, engaged in arranging financing for this project," ICBC, China's biggest listed lender by assets, said in a statement on its Australian website.
"ICBC attaches great importance to its social responsibilities and keenly promotes 'green financing' ... This statement is made without any view on or prejudice towards the Carmichael mine project."
The mine's location 400 kms (250 miles) from a Pacific Ocean shipping terminal means financing infrastructure costs has been at the forefront of debate over the project's economic viability.
"China Construction Bank is not involved with, nor considering involvement with, the Adani Carmichael Mine project," an external spokesperson for China Construction Bank in Australia said in an emailed statement on Monday.
CCB in China was not immediately available for comment.
China Export Import Bank was not immediately available for comment.
Carmichael has been delayed by court challenges from environmentalists and indigenous groups concerned about climate change and the impact on native land and water supply, but those challenges have been rejected.