Chile: mining areas connected to giant sinkhole were permanently closed

The permanent closure of mining stopes directly related to a giant sinkhole, that appeared in the northern part of the country in July, was announced by Chile's mining minister on Friday (07 October 2022).

Mining minister Marcela Hernando made the announcement after meeting with union members, mine workers and technical experts studying the sinkhole.

"The sector of the Gaby stopes, that are directly related to the subsidence, are closed definitively and will never be exploited again," Hernando said, referring to a sector of stopes in the Alcaparrosa copper mine in northern Chile.

The minister added that the government is working on recovering water from an aquifer that was damaged by the sinkhole.

"We're interested in recovering 1.3 million cubic meters of water that are currently stagnant in the depth," Hernando said. "Our intention is to return them to the aquifer, for which we're studying multiple alternatives."

Chile's SMA environmental regulator announced the charges against the Canadian-owned Lundin Mining Corp's copper mine on Thursday for the sinkhole.

SMA filed a charge labeled as "very serious" for "irreparable environmental damage" to the aquifer, in addition to a "serious" charge for over-extraction and two minor ones related to transporting minerals.

The government said it was planning to reopen parts of the mine where conditions allowed to avoid the loss of jobs.

Canada's Lundin Mining Corp owns 80% of the property, while the remaining 20% is held by Japan's Sumitomo Metal Mining and Sumitomo Corp.

The company could face closure, have its environmental permit revoked or be fined the equivalent of $13 million or more.

In mid-August, the SMA ordered "urgent and transitory" measures while investigating the causes of the 36.5-meter-diameter (120-foot-diameter) hole in Tierra Amarilla, some 665 km (413 miles) north of the capital.