Based on the world record nomination from Asia Records Institute (ASRI) and Decision No. WK/USA.INDIA/687/2021/No.143, World Records Union (WorldKings) officially declared Grasberg gold mine as the largest gold mine in the world on April 29, 2021.

Grasberg minerals district includes open-pit and underground mines. It has produced 528 billion ounces of copper and 53 million ounces (Moz) of gold, including more than 432 billion ounces of copper and 46Moz of gold from the Grasberg open pit.

The mine stands at the collision of the Indo-Australian and the Pacific tectonic plates. Two distinct phases of intrusion have led to the production of nested coaxial porphyry ore bodies and sulphide-rich skarn at the margins, while sedimentary strata include Eocene clastic carbonate limestone with siltstones and sandstones near the base.

Each year, this gold mine provides on average the world more than 2 million ounces of gold. Currently, this gold mine has nearly 20,000 mining workers. It is mainly owned by Freeport-McMoRan (FCX).

FCX operates under a Contract of Work (CoW) agreement with the government of  which allows Freeport to conduct exploration, mining and production activities in a 11,100-hectare (27,400-acre) area (Block A). It also conducts exploration activities in a 167,000 ha (413,000 acres) area (Block B).

According to Mining Technology