Jan 8 (Reuters) - Blank-cheque firm ACG Acquisition said on Monday it had signed a non-binding term sheet for a controlling stake in a copper mine in the EMEA region.

The mine is estimated to produce 20-25 kilo-tonnes of copper per annum, the special purpose acquisition company (SPAC) said, adding that the acquisition would require a funding of $200 million.

"There can be no certainty that a binding agreement in respect of this opportunity will be reached nor as to the terms of any potential financing," ACG said.

In September, a $1 billion metals deal by the company was terminated following delays when the different sides, which included a leading global miner and top automakers as anchor investors, tried to revise it.

ACG had planned to buy a nickel mine and a copper mine from Appian Capital, betting on rising demand for metals needed for the global green energy transition.

SPACs are shell companies that raise money via an initial public offering and later merge with a private company, taking it public. (Reporting by Eva Mathews in Bengaluru)