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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
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 and operational data has not been publicly available since 2014.


Owners & OPERATOR

Source: p. 30
CompanyInterestOwnership
Pt Berau Coal Energy Tbk. (operator) 100 % Direct
Through PT Berau Coal, the Company has evolved into one of the largest thermal coal producers in Indonesia.

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:

PT Berau Coal, the main operating subsidiary of the Company, owns a 118,400 ha mining concession area located in the Berau Regency, approximately 300 kilometers north of Samarinda, the capital city of the East Kalimantan province. The concession area is based on a letter from the Ministry of Energy and Mineral Resources No. 178.K/40.00/DJG/205 dated 7 April 2005 and valid until 2025, with possible extension options, 2 x 10 years.

PT Berau Coal has three principal open cut mining operations; Lati, Binungan, and Sambarata, located in an 118,400 hectare concession area.

From the Lati mine the coal is blended to produce the brands of Agathis and Sungkai. Total mineable coal resources delineated in Lati to-date are in excess of 465 million tonnes.

The coal is extracted using hydraulic excavators and loaded into dump trucks.


Crushing and Grinding


Processing


Summary:

The coal is transported over an all weather haul road, a distance of some 11 kilometres to the coal processing plant. The coal is crushed blended and placed onto stockpiles. It is then loaded into barges.The coal is curshed, blended and loaded into trucks. From there it is transported over on all weather road, a distance of 28 kilometres, to the Suaran coal terminal where it is blended into the product stockpile. It is then loaded into barges.


Production:

CommodityUnits201420132012
Coal (thermal) Mt 9.91011
All production numbers are expressed as clean coal.


Reserves at December 1, 2014:

CategoryTonnage Commodity
Proven 64 Mt Coal (thermal)
Probable 35 Mt Coal (thermal)
Proven & Probable 100 Mt Coal (thermal)
Measured 218 Mt Coal (thermal)
Indicated 127 Mt Coal (thermal)
Inferred 104 Mt Coal (thermal)
Total Resource 449 Mt Coal (thermal)


Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 23, 2020
....................... Subscription required ....................... Subscription required Subscription required Mar 20, 2020
Subscription required - Subscription is required.


Corporate Filings & Presentations:

DocumentYear
Annual Report 2014
Other 1994
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Aerial view:

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