Rio Tinto Group's (ASX:RIO) Oyu Tolgoi unit in Mongolia has resumed regular concentrate export shipments, according to a Thursday social media post on X.

The operation injects an average of 23 billion Mongolian tugrik into the country's economy every day and accounts for more than 10% of Mongolia's gross domestic product, according to the post.

The Oyu Tolgoi copper and gold deposit is jointly owned by the government of Mongolia, which has a 34% stake, and Rio Tinto, which owns the remaining 66%, according to the company's website.

The company's shares fell nearly 2% in recent Thursday trade.