Earthquakes have the potential to substantially affect mining operations, leading to supply chain disruptions that adversely affect the global economy.
China's imports of major commodities are often viewed through the prism of the performance of, and outlook for, the world's second-biggest economy.
Anglo American has warned of more production cuts at De Beers due to reduced spending by Chinese consumers prolonging the market downturn.
Earlier this month, Freeport obtained an export permit for the rest of the year from the government.
