BATU HIJAU COPPER-GOLD DEPOSIT


The Batu Hijau porphyry copper-gold orebody is located at long. 116º49', lat. 9º00'S on the island of Sumbawa in the Sunda-Banda Arc, Indonesia. Mineralisation occurs in the central stock of a tonalite intrusive complex, and in diorite and volcanic wallrocks. The central stock has associated intense pervasive potassic alteration that contains most of the higher grade mineralisation. This merges outwards into an extensive propylitic zone. Both of these zones are over-printed by widespread intermediate-argillic and minor phyllic and albite alteration. Argillic and advanced-argillic assemblages occur near surface. Copper and gold are largely hosted by quartz stockworks, but also as disseminations. Chalcopyrite and bornite are the main ore minerals. Current pit reserves as of December 2002 were 920 mt @ 0.55% Cu, 0.42 g/t Au. The property is owned by Newmont Indonesia Ltd.

Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Location map of Batu Hijau
Source: Courtesy Newmont Mining Corporation
Date: 2003
File size: 8911 bytes
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Batu Hijau location
Source: Courtesy Newmont Mining Corporation
Date: 2003
File size: 35.95 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Project layout
Source: Courtesy Newmont Mining Corporation
Date: 2003
File size: 38.64 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Cross-section of mine geology with projected pit profiles
Source: Courtesy Newmont Mining Corporation
Date: 2003
File size: 34.00 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Early benches on supergene mineralisation at Batu Hijau
Source: Alan Goode
Date: April 1999
File size: 47.78 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Early benches on supergene mineralisation at Batu Hijau
Source: Alan Goode
Date: April 1999
File size: 30.51 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Early benches on supergene mineralisation at Batu Hijau
Source: Alan Goode
Date: April 1999
File size: 34.80 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: View along route to waste dumps
Source: Alan Goode
Date: April 1999
File size: 38.19 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: View NE across pit. The darker central area in the centre of the image is magnetite, biotite-altered tonalite (ore); the lighter material to the front is clay over sericite-chlorite.
Source: Peter Laznicka
Date: 2000
File size: 36.52 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Mining ore in magnetite-biotite altered tonalite: to the rear is clay over sericite-chlorite in tonalite
Source: Peter Laznicka
Date: 2000
File size: 47.16 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Pit wall mostly in mineralised intermediate tonalite
Source: Peter Laznicka
Date: 2000
File size: 63.03 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Erratically developed oxidation and chalcocite (secondary sulphide) zones, presently not exploited
Source: Peter Laznicka
Date: 2000
File size: 81.48 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Supergene copper carbonates associated with mineralised quartz stockwork vein system
Source: Alan Goode
Date: April 1999
File size: 75.36 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Typical better grade copper-gold ore. Fracture-controlled chalcopyrite in quartz biotite-magnetite altered old tonalite porphyry.
Source: Peter Laznicka
Date: 2000
File size: 72.95 Kb
Location: Batu Hijau, Sumbawa Island, Indonesia
Annotation: Young tonalite with biotite altered hornblende
Source: Peter Laznicka
Date: 2000
File size: 80.46 Kb

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