Geological reserves at Mount Pongkor reach approximately 6 million tons of gold ore with an average gold grade of approximately 17.14 grams per ton and a silver grade of approximately 154.28 grams per ton.
This figure demonstrates the significance of Mount Pongkor's mineral resources.
According to the 2012 article "Tracing the Traces of the Gurandil at the Pongkor Gold Mine" on the Ministry of Energy and Mineral Resources website, the gold reserves at Mount Pongkor are estimated to be sustainable for the next 12 to 14 years.
This indicates that the mine still has substantial and sustainable production potential, playing a significant role in contributing to the national gold supply.
4. Dompu, West Nusa Tenggara (NTB)
The Onto Mine is a gold mine located in Hu'u District, Dompu Regency, West Nusa Tenggara (NTB). The Onto Mine is the result of exploration conducted by PT Sumbawa Timur Mining (STM) since 2010.
The discovery of a copper-gold ore deposit in this area was announced in February 2020 by the Ministry of Energy and Mineral Resources (ESDM), indicating the region's significant potential.
Based on exploration results as of December 2019, the Onto Mine's mineral resources are estimated at 1.7 billion tons, with a copper content of 0.89% and gold content of 0.49 grams per ton.
To determine the size, extent, and characteristics of the mineral resources, 64 drill holes were drilled. This discovery demonstrates the vast and rich mineral resources of the Onto Mine.
BACA JUGA:20 Places in Indonesia with Extraordinary Views, You Must Visit
5. West Sumbawa, NTB
The Batu Hijau gold mine is located in West Sumbawa Regency, West Nusa Tenggara Province (NTB).
Known as the second-largest gold and copper mine in Indonesia, Batu Hijau even holds the largest reserves in the country.
Operations began in 2000 and are managed by PT Amman Mineral Nusa Tenggara, an Indonesian mining company with a strong reputation in the industry.
The Batu Hijau mine is a key asset in Amman Mineral Nusa Tenggara's mining portfolio. Batu Hijau's significant gold and copper reserves solidify its position as a key pillar of the Indonesian mining industry.
Exploitation of the natural resources here not only impacts the local economy in West Sumbawa but also makes a substantial contribution to the national economy.