Binungan Mine

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Mine TypeOpen Pit
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
Production Start... Lock
SnapshotFrom the Binungan mine the coal is blended to produce the brands of Ebony and Mahoni/Mahoni-B.


Pt Berau Coal Energy Tbk. 100 % Indirect
PT Berau Coal (operator) 100 % Direct
PT Berau Coal, the main operating subsidiary of the Company (PT Berau Coal Energy Tbk), owns a 108,900 ha mining concession area.

PT Berau Coal Energy Tbk was established on September 7, 2005 under the name PT Risco to run businesses in trading, mining, plantation, construction, real estate, agriculture, printing, industry, transportation, and services. The Company then expanded its business activities and became an investment holding company by acquiring PT Armadian Tritunggal (Armadian) in 2006. Through this acquisition, the Company focuses its business activities in mining, which are fully operated by PT Berau Coal, a Subsidiary of Armadian.



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Deposit type

  • Sedimentary


Pre-Tertiary, Eocene and Oligocene sedimentary rocks are present in the Tanjung Redeb area but none are found in the Berau Coalfield (Lati, Kelai and Binungan areas). The Eocene and Oligocene sediments are dominantly marine, fine grained clastic rocks with rare volcanic units, although non-marine sandstones and minor coal deposits occur immediately above the basal Tertiary unconformity.

The oldest rocks present in the Berau Coalfield are of Miocene age and belong to the Sterile Formation. This formation is composed of marine mudstone, siltstone and sandstone. The sandstone is massive and fine- to very fine-grained and it is interbedded with mudstone and siltstone. Burrows are common in all lithologies.

The Sterile Formation conformably underlies the coal-bearing Berau Formation although the contact between the formations is difficult to place in the Berau Coalfield. The Berau Formation, at least 400 metres thick, contains interbedded mudstone, siltstone, sandstone and coal. Shell fossils, plant impressions, coal flakes and burrows are common, particularly in the mudstone.

The coal measures of the Tarakan Basin occur in the Berau Formation which contains at least 19 seams. The thicknesses of the seams range from a few centimetres up to 4.5 m with dips of 5° to 20°. Exposure of the seams is good and they can be traced in three geographic areas which correspond to structural zones formed by post Miocene folding - Kelai, Lati and Binungan.



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Mining Methods


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Crushers and Mills

Milling equipment has not been reported.



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Coal (thermal) Mt  ....  Subscribe  ....  Subscribe  ....  Subscribe1513121312
All production numbers are expressed as ROM coal.

Operational metrics

Coal tonnes mined  ....  Subscribe  ....  Subscribe  ....  Subscribe15.4 Mt of ROM coal13.1 Mt of ROM coal12.5 Mt of ROM coal12.8 Mt of ROM coal

Production Costs

Commodity production costs have not been reported.

Heavy Mobile Equipment

Fleet data has not been reported.


Mine Management

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 2, 2023
....................... Subscription required ....................... Subscription required Subscription required Oct 2, 2023

Aerial view:


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