معدن رزولوشن کوپر (Resolution Copper Mine) واقع در نزدیکی سوپریور، آریزونا، آمریکا (Superior, Arizona, USA)– یک سرمایه‌گذاری مشترک بین شرکت‌های Rio Tinto و BHP
این روش به دلیل بهره‌وری بالا و کاهش هزینه‌های استخراج در معادن عمیق و بزرگ، یکی از روش‌های مؤثر و پرکاربرد در استخراج ذخایر مس در معادن پورفیری است.
BY Mining Eng - مهندسی معدن و زمین شناسی ⚒
The global forecast for the Asian markets is murky following recent volatility, with crude oil prices providing support in what has been an otherwise tough month. The European markets were down and the U.S. bourses were mixed and flat and the Asian markets figure to split the difference.The TSE finished modestly lower on Friday following losses from the financial shares and property stocks.For the day, the index sank 15.09 points or 0.49 percent to finish at 3,061.35 after trading between 3,057.84 and 3,089.78. Volume was 1.39 billion shares worth 1.30 billion Singapore dollars. There were 285 decliners and 184 gainers.
“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.
Mining Eng from tw