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Laos
Sepon Mine

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 Location:
36 km NW from Xepon, Laos

  Address:
A7 Xiaojing, Wanfeng Road, Fengtai District
Beijing
China
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit & Underground
Commodities
  • Copper
  • Gold
Mining Method
  • Truck & Shovel / Loader
  • Sub-level stoping
Production Start...
Mine Life2030
In 2022 Lane Xang Minerals Limited (“LXML”) opened the first modern underground mine in Lao PDR at Sepon, setting the standard for other mining operations, extending the life of the mine to at least 2033.


Owners

Source: p. 1
CompanyInterestOwnership
Chifeng Jilong Gold Mining Co., Ltd. 90 % Indirect
Lane Xang Minerals Limited (LXML) is the registered name of the company which owns and operates Sepon. Chifeng Jilong Gold Mining Co., Ltd owns 90 per cent of LXML. and the Lao Government owns 10%.

Contractors

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Deposit Type

  • Porphyry
  • Carlin-type
  • Skarn
  • Vein / narrow vein


Summary:

The Sepon project area is situated near the eastern margin of the intra-continental Khorat Basin and on the western flank of the Anamite Range fold belt. It lies within the Troungson geological region covering a broad spectrum of rocks ranging in age from Upper Proterozoic to Jurassic. The regional geology is dominated by an Upper Palaeozoic sedimentary belt of arkosic and feldspathic sandstone, variably calcareous and carbonaceous siltstone, shale and limestone which is variably dolomitised and locally marble. There are lesser volcanic rocks, typically comprised of agglomerate, conglomerate, tuffaceous sandstone, and rare coherent volcanics. The belt is cut by plutonic to sub-volcanic bodies of granite, monzodiorite, granodiorite, quartz porphyry, rhyodacite porphyry (RDP) and andesite porphyry. The intrusive rocks are preferentially emplaced along either east or north-west trending well-developed structures.

Several styles of mineralisation have been recognised within the Sepon Mineral District: porphyry-like Cu-Mo-Au mineralisation, skarnoid Cu-Mo-Au mineralisation adjacent to porphyry intrusive, distal skarn related Cu-Au-Ag+/- Pb+/-Zn massive sulphide veins, Carlin type carbonate hosted gold mineralisation and carbonate hosted Mississippi Valley type Pb-Zn-Ag mineralisation. In addition weathering and supergene re-mobilisation has created supergene copper, exotic supergene copper, oxide gold and alluvial gold in karst fill deposits.

All primary depo ........


Mining Methods

  • Truck & Shovel / Loader
  • Sub-level stoping


Summary:

Sepon mine is an open pit operation that is mining and processing supergene copper ore. The operation uses a fleet of excavators and articulated trucks along with a fleet of auxiliary equipment. This mining method is appropriate for the style and size of the mineralisation.

Pit optimisations and designs adhered to recommended geotechnical parameters. The inter-ramp slopes used range between 18° – 40° for the clay material and 35° – 50° for the more competent material.


Sepon mine to operate the first modern underground mine in Lao PDR.

With a mineral resource of 9.5 million tonnes and projected ore production to increase from 400,000 tonnes in 2023 to 1.2 million tonnes per annum thereafter, the “Discovery Deeps Underground Mine” is expected to extend Sepon’s mine life for at least another seven years, to 2030.

The underground mine will extend 450 metres below the surface. The decline access tunnel will be more than 1,800m long, 5m high and 5m wide to accommodate modern underground excavation and drilling equipment.

The pit design comprises a 70° slope angle, 20 m height, and 10-15 m safety berm, meeting stability requirements with a factor of safety of 2.46. Underground mining design includes a 62° ore body dip, 50 m thick crown pillar to prevent surface subsidence, and 5 m wide, 5 m high stopes. Sill pillars are left for support after each level excavation. Rock bolts are employed in specific stope areas where is ........


Crushing and Grinding


Processing

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Summary:

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Production:

CommodityProductUnits2023202220212020201920182017
Copper Cathode t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required71,25862,941
Gold Metal in doré koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required
^ Guidance / Forecast.
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Operational Metrics:

Metrics2022202020192017
Annual milling capacity  ......  Subscription required
Total tonnes mined  ......  Subscription required32 Mt25 Mt
Ore tonnes mined  ......  Subscription required1,335,942 t
Tonnes milled  ......  Subscription required3,149,317 t
Subscription required - Subscription is required.

Reserves at October 12, 2017:

CategoryTonnage Commodity
Probable 9.4 Mt Copper
Probable 9.4 Mt Gold
Total Resource 36.3 Mt Copper
Total Resource 36.3 Mt Gold

Commodity Production Costs:

CommodityUnits20172016
C1 cash costs Copper USD 1.59 / lb   1.32 / lb  

Financials:

Units201820172016
Revenue M USD 391.9   390.8  
EBIT M USD 17.7   4.8   -36.7  
EBITDA M USD 119.2   101.5  



Heavy Mobile Equipment:

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 10, 2023
....................... Subscription required ....................... Subscription required Subscription required Sep 10, 2023
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2022
Subscription required Subscription required Subscription required 2021
Subscription required Subscription required Subscription required 2020
Subscription required Subscription required Subscription required 2019
Subscription required Subscription required Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Other 2023
Other 2023
Annual Report 2022
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
Quarterly Report 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Quarterly Report 2017
Sustainability Report 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Other 2016
Sustainability Report 2016
Year-end Mineral Reserves 2016
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