Grasberg Mine, Copper and gold mine in Papua, Indonesia
This operation extends across multiple levels beneath the surface at more than 4000 meters elevation in the Sudirman range, employing three different extraction methods that work at different depths. The excavation reaches from shafts near the surface down to deep caverns where ore is released through controlled collapse.
A Dutch geologist encountered ore veins during an ascent of Mount Carstensz and collected samples that were later studied. The following decades brought gradual expansion of extraction as access roads and infrastructure were built into the remote highlands.
Local workers come from distant parts of Indonesia and live in high-altitude settlements where the cold air and thin oxygen shape daily routines in ways unfamiliar to lowland visitors. Families who moved here for employment adapted their cooking methods and built homes designed to withstand the mountain climate.
Access requires special permission and remains closed to visitors without prior arrangement, as the facility includes active extraction areas and security zones. Those traveling nearby can view the surroundings from a distance but should account for the altitude and harsh mountain weather.
The caverns beneath the surface are so large that they release rock through controlled collapse over many years, which is then transported upward and processed. This method allows extraction of deep ore without creating open pits at the surface.
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