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March 24 (Reuters) - SouthGobi Resources Ltd , a Canadian coal miner with operations in Mongolia, said it could default on a debt repayment and was looking to raise money, sending its shares down as much as 29 percent in afternoon trading.
The company, controlled by Rio Tinto Plc through its unit Turquoise Hill Resources Ltd, also reported a bigger quarterly loss, mainly due to impairment charges.
A delay in securing additional financing could result in a default of $250 million debentures held by China Investment Corp, SouthGobi said in a statement on Monday.
SouthGobi shares plunged to 52 Canadian cents in afternoon trading, making it one of the biggest percentage losers on the Toronto Stock Exchange.
The company had working capital - the difference between current assets and liabilities - of $41.7 million as of Dec. 31, compared with $120.4 million a year earlier. As of March 24, the company had $10 million cash on hand.
SouthGobi said it expects liquidity problems to continue and margins to remain weak as coal prices are likely to stay anemic in China this year, echoing U.S. rivals such as Alpha Natural Resources and Arch Coal Inc.
Producers of metallurgical, or steelmaking, coal have been hit by weak demand amid slowing growth in China.
SouthGobi is being investigated by Mongolia's Independent Authority Against Corruption (IAAC) and State Investigation Office (SIA) for possible breaches of anti-corruption, money laundering and taxation laws.
The company said on Monday it had received a notice from the Mongolian authorities that might lead to criminal actions against three of its former employees and SouthGobi could be held liable as "civil defendant".
The company's net loss widened to $138.7 million, or 75 cents per share, in the fourth quarter ended Dec. 31, from $56.6 million, or 31 cents per share, a year earlier.
SouthGobi took impairment losses of $106.8 million in the quarter.
The company reported revenue of $32.5 million.
SouthGobi reported revenue of $1.2 million in the year-earlier quarter, hurt by suspension of production at its flagship Ovoot Tolgoi mine in Mongolia.
The company's shares had fallen about 65 percent in the past year, excluding Monday's losses. The stock underperformed the TSX-Toronto Stock Exchange 300 Composite Index, which had risen about 12 percent in the same period.
(Reporting by Ashutosh Pandey in Bangalore; Editing by Kirti Pandey)