Sepon is an open pit, copper and gold mining operation in southern Laos.

Lane Xang Minerals Limited (LXML) is the registered name of the company which operates Sepon. Lane Xang is Lao for “one million elephants”, a historical name for the kingdom of Laos.  MMG owns 90% of LXML, while the Lao Government owns the other 10%.


The Sepon copper operation commenced production in 2005 and by early 2011 a copper expansion project had lifted annual production capacity from approximately 65,000 tonnes to 80,000 tonnes per annum of copper cathode.

Sepon’s copper cathode typically attracts a premium over the London Metals Exchange (LME) copper price
due to the high quality of the product, the project’s proximity to customers and the reliability of supply.

In the fourth quarter 2011, the LME issued a formal notice confirming that ’Sepon’ brand copper cathode had been listed as Copper – Grade A brand, eligible for delivery to LME-approved warehouses.


The Sepon gold project yielded its first gold and silver doré in December 2002. In early 2005, an expansion of the original gold processing facility was completed, doubling the capacity of the gold processing plant to 2.5 million tonnes of ore per annum.

Since the commencement of operations, the Sepon gold operation has produced over 1.2 million ounces of gold through open pit mining and conventional treatment of oxide gold ore.

MMG ceased gold operations in December 2013 due to depleting ore reserves and lower margins. The gold plant has been placed on care and maintenance while the Sepon operation focuses on copper production.


The Sepon mine is located in Vilabouly district, Savannakhet province.

It operates 24 hours a day, 7 days a week, 365 days of the year.

Sepon is a closed site and does not provide tours.

Vientiane office

Sepon’s administrative functions are managed out of the Vientiane office.

MMG House, Bourichanh Road, Sisattanak District,
PO Box 4486, Vientiane Capital Lao PDR
T (021) 268 200
F (021) 268 201

The Vientiane office operates from 8.00am to 5.00pm Monday to Friday.


Robin Hamilton Coates
External Relations Manager

Rick Watsford
General Manager Sepon

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