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Indonesia
Lati Mine

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 Location:
109 km S from Tarakan, Indonesia

  Regional Office:
Sinarmas MSIG Tower, Lantai 8. Jl. Jend. Sudirman Kav. 21. RT 012 RW 001 Kel. Karet, Kec. Setiabudi
Jakarta
Indonesia
12920
Phone  ...  Subscription required
Fax+6221-8061-3738
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Coal (thermal)
Mining Method
  • Truck & Shovel / Loader
Production Start...


Owners

Source: p. 1
CompanyInterestOwnership
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 located in the Berau Regency.

Contractors

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Deposit Type

  • Sedimentary


Summary:

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.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Coal is mined using open-cut mining methods where primary overburden stripping and coal mining are conducted using hydraulic excavators and trucks. The mining process begins with land clearing, followed by top soil removal, drilling and blasting for overburden removal, excavation, transporting coal. Post mining activities are backfilling, final contouring of disposal, and eventual revegetation of pits, after which mining activities are completed.


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityUnits202120202019201820172016
Coal (thermal) Mt  ......  Subscription required  ......  Subscription required  ......  Subscription required121210
Sulfur%0.82
All production numbers are expressed as ROM coal.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Coal tonnes mined  ......  Subscription required  ......  Subscription required12.5 Mt of ROM coal12.2 Mt of ROM coal12.4 Mt of ROM coal10.1 Mt of ROM coal
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Reserves at December 31, 2021:

CategoryTonnage Commodity
Proven 51 Mt Coal (thermal)
Probable 4 Mt Coal (thermal)
Proven & Probable 55 Mt Coal (thermal)
Measured 134 Mt Coal (thermal)
Indicated 66 Mt Coal (thermal)
Inferred 68 Mt Coal (thermal)
Total Resource 268 Mt Coal (thermal)



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 15, 2022
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Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
Annual Report 2017
Annual Report 2015
Annual Report 2014
Other 1994
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