Overview
| Stage | Production |
| Mine Type | Open Pit |
| Commodities |
|
| Mining Method |
|
| Processing |
|
| Production Start | ...  |
| Mine Life | 10 years (as of Jan 1, 2021) |
In February 2021, AMNT had to suspend operations for one month to contain the spread of COVID-19 at the Batu Hijau mine site. Then, as the Delta variant surged in Indonesia in August 2021, AMNT halted mining operations for three months because of operator shortages.
In compliance with the 2020 Mineral and Coal Mining Law, AMNT has committed to building a copper smelter and precious metals refinery through its subsidiary company PT Amman Mineral Industri (AMIN).
The facilities will be located near the AMNT port at Benete Bay, West Sumbawa Regency, West Nusa Tenggara Province, and will have a design capacity of 900,000 dry tonnes of copper concentrate per annum, in line with the reserves and long-term production plans at Batu Hijau and Elang. |
Source:
p. 262,403
Holding company PT Amman Mineral Internasional (AMI) owns the entire share capital of AMNT.
Medco's ownership of AMI is 23.13%.
Contractors
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Summary:
The deposit is hosted by a central stock of multiple tonalite porphyries intruded into older diorite and andesite volcanic wallrocks and activities continue to develop the reserve.
Summary:
The Batu Hijau is a large open pit porphyry copper/gold deposit mined using traditional truck and shovel techniques.
AMNT is now developing Phase 8 to extend the mine life beyond 2030.
Since mining operation started in 2000, the mine has gone through a total of seven mining phases. Currently, the mine has a length of roughly 3 km, a width around 2.5 km, with a current maximum depth at -315 meters below sea level. In Batu Hijau Pit, each bench is 15 meters high, with bench face angle varies between 60 and 70 degrees, and the overall slope angle of the pit varies between 36 and 38 degrees.
Source:
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Source:
Summary:
At Batu Hijau, ore containing copper and gold is crushed to a coarse size at the mine and then transported from the mine via conveyor to a concentrator, where it is finely ground and then treated by successive stages of flotation, resulting in a copper/gold concentrate containing approximately 26% to 29% copper. The concentrate is dewatered and stored for loading onto ships for transport to smelters.
Reserves at December 31, 2021:
| Category | Tonnage | Commodity | Contained Metal |
|
Proven & Probable
|
Mt
|
Gold
|
8,900 koz
|
|
Proven & Probable
|
Mt
|
Copper
|
7,040 M lbs
|
|
Total Resource
|
Mt
|
Gold
|
14,797 koz
|
|
Total Resource
|
Mt
|
Copper
|
16,093 M lbs
|
Commodity Production Costs:
| | Commodity | Units | 2015 |
|
Total cash costs (sold)
|
Copper
|
USD
|
1.05 / lb
|
|
Total cash costs (sold)
|
Gold
|
USD
|
439 / oz
|
|
All-in sustaining costs (sold)
|
Copper
|
USD
|
1.43 / lb
|
|
All-in sustaining costs (sold)
|
Gold
|
USD
|
618 / oz
|
Financials:
| | Units | 2021 | 2020 | 2019 | 2018 |
|
Capital expenditures
|
M USD
| | | |
|
|
Pre-tax Income
|
M USD
| | | |
|
|
After-tax Income
|
M USD
| ...... | ...... | ...... |
-167.7
|
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Corporate Filings & Presentations:
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Aerial view:
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