Grasberg Mine, Gold and Copper, Papua,
The Grasberg Mine is the largest gold mine and the third largest copper mine in the world. It is located in the province of Papua in Indonesia near Puncak Jaya, the highest mountain in Papua," Source:
Wikipedia: Grasberg Mine.
Open-pit mining is a surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow.
Grasberg Mine Map