Southeast Asia: Distribution of Major Mineral Deposits

1. Distribution of Copper Resources

Copper resources in Southeast Asia are primarily concentrated in Indonesia, the Philippines, the Annamite Range in Laos, and the Central Volcanic Arc of Myanmar.

• Indonesia: A global heavyweight in copper resources. Deposits are primarily located in the Ertsberg and Grasberg mountains of Papua Province, with smaller deposits in Sulawesi, Sumatra, and Java. The dominant mineralization style is porphyry copper. Key deposits include:

  • Ertsberg and Grasberg Copper-Gold Mines (Papua Province)

  • Batu Hijau Copper Mine (Sumbawa Island)

  • Various deposits in North Sulawesi and Bacan Island.

• The Philippines: Boasts abundant copper resources, mainly distributed across:

  • Northern Luzon Highlands: Zambales, Benguet, and Nueva Vizcaya provinces.

  • Southern Mindanao: Surigao del Norte, Zamboanga del Norte, Davao Oriental, and South Cotabato provinces.

  • Central Region: Cebu Province and surrounding areas. The mineralization is primarily porphyry-type. Representative deposits include:

  • Atlas Copper Mine

  • Kingking Copper-Gold Project

  • Maricalum Copper Mine

  • Tampakan Copper-Gold Project

• Laos (Annamite Range): Copper is mainly found in Vientiane, Xieng Khouang, Savannakhet, and Sayaboury provinces. These are predominantly large-scale porphyry copper deposits, often associated with gold. Representative deposits include:

  • Phu Kham Copper-Gold Mine

  • Sepon Copper-Gold Mine Furthermore, significant potential for large-scale copper and copper-gold deposits exists along the Xaisomboun, Sayaboury, and Xieng Khouang–Bolikhamsai–Savannakhet–Attapeu trend.

• Myanmar (Central Island Arc): This is Myanmar’s most critical copper concentration zone, spanning Sagaing, Mandalay, and Bago regions, as well as parts of western Shan State. These deposits are characterized by recent mineralization ages, large scales, shallow depths, and high grades, with a close genetic link to volcanic activity. The Monywa porphyry-epithermal copper mine serves as the typical representative.

2. Distribution of Gold Resources

Southeast Asia is rich in gold, with concentrations primarily in Indonesia, Laos, and the Philippines, followed by Vietnam, Myanmar, Cambodia, and Thailand. Mineralization styles include porphyry-skarn gold (copper), epithermal gold, sedimentary-hosted gold, and orogenic gold.

• Indonesia: Holds the largest gold reserves in Asia. The primary mineralization types are:

  • Low-sulfidation epithermal gold deposits.

  • Skarn-porphyry copper-gold deposits. The Grasberg Gold-Copper Mine in Papua Province is the flagship deposit and one of the largest gold mines in the world.

• Laos: Gold is mainly distributed along:

  • The Luang Prabang–Loei (Thailand) volcanic belt.

  • The Laos–Vietnam Annamite metallogenic belt. Mineralization is closely linked to magmatism within volcanic arcs and back-arc basins.

• Vietnam: The Tam Ky–Phuoc Son suture zone in the southern Annamite Range is a major hub for orogenic gold deposits. Representative mines include:

  • Phuoc Son Gold Mine

  • Bong Mieu Gold Mine

• Philippines and Myanmar: Gold distribution is centered on:

  • The Mindanao Volcanic Belt (Philippines).

  • The Central Island Arc Volcanic Belt (Myanmar). The dominant types are porphyry and epithermal gold deposits.