Thompson, who has been chairman of the company since 2018, said according to Rio Tinto’s board that he would not be eligible for re-election in 2022, according to the company.
“As chairman, I am ultimately responsible for the shortcomings that led to this tragic event,” Thompson said in a statement. “The tragic events at Juukan Gorge are a source of personal sadness and deep regret, as well as a clear violation of our values as a company.”
Thompson’s announcement comes almost a year after Rio Tinto, the second largest mining company in the world, blew up the Juukan Gorge in Western Australia to expand an iron ore mine.
The local rangers of the country, the Puutu Kunti Kurrama and Pinikura people, fought for years to protect the caves, and their destruction was met with indignation. The caves had a significant archaeological value and a deep cultural significance for the indigenous people.
Two other executives – Chris Salisbury, head of the iron ore industry, and Simone Niven, group manager for corporate relations – also left the company after the incident.
Thompson said in his statement on Wednesday that the company had involved investors, the government and indigenous communities to learn from the demolition of the caves.
The council said it had accepted Thompson’s decision and would seek a successor.