智利上半年铜矿开采成本下降，逆转趋势

Group 1 - The core point of the article is that Chile's large copper mines have experienced a decrease in direct production costs in the first half of the year, reversing a trend of rising costs in recent years [1] - Cochilco reported that the decrease in costs is attributed to lower processing and refining costs, alongside significant increases in gold and silver prices, which rose by 39% and 26% respectively during the same period [1] - The cash cost of copper in Chile, the world's largest copper producer, has dropped to $1.767 per pound, compared to $1.912 per pound in the first half of 2024 [1] Group 2 - Cochilco conducted a survey of 21 copper mining companies, which account for approximately 94% of the country's mining output [2]