Oxiana Limited

Oxiana Limited was an Australian mining and exploration company whose principal commodities were copper and gold. The company traced its corporate history to Golden Plateau, established in 1932 and listed on the Australian Securities Exchange. During the early 1980s, the business moved away from a primary emphasis on gold mining and toward gold exploration. It subsequently changed its name to Oxiana Resources in 1995 and adopted the Oxiana Limited name in 2003. Oxiana built its operating identity around a portfolio of mines and development assets spanning Australia and Southeast Asia. Its most important operating interests included the Sepon copper and gold project in southern Laos, the Golden Grove polymetallic mine in Western Australia and the Prominent Hill copper-gold deposit in South Australia. Sepon was a key international growth asset, while Golden Grove provided an established Australian mining operation and Prominent Hill represented a major development opportunity in copper and gold. The company expanded through acquisitions as well as project development. In June 2005, it purchased the Golden Grove Mine from Newmont. In February 2007, Oxiana made a friendly takeover offer for Agincourt Resources; the transaction was accepted in April of that year. Through Agincourt, Oxiana added the Wiluna Gold Mine in Western Australia, Nova, an energy business with uranium rights at Wiluna, and the Martabe Gold Project in Sumatra, Indonesia. The portfolio was then adjusted when Oxiana sold the Wiluna Gold Mine to Apex Minerals in July 2007. Oxiana’s final major corporate turning point was its combination with Zinifex. In March 2008, the two companies announced their intention to merge. The merger became effective on 20 June 2008, and the combined business adopted the OZ Minerals name on 18 July 2008. Oxiana therefore ceased to operate as an independent corporate identity, although assets and subsidiaries associated with its earlier activities continued within successor structures. The former company has also remained relevant in later regulatory reporting because Oxiana (Cambodia) Limited, a foreign subsidiary later associated with the OZ Minerals group, was investigated by the Australian Federal Police in 2023 over alleged foreign bribery. The investigation concerned alleged conduct and a subsidiary relationship rather than a new operating phase for the historical Oxiana company. Overall, Oxiana is best understood as a now-defunct Australian mining-company brand whose legacy lies in the development and operation of copper and gold assets in Laos and Australia, its Southeast Asian expansion, and its transformation into OZ Minerals through the Zinifex merger.

Oxiana’s corporate lineage began in 1932, when the business was established as Golden Plateau. It was listed on the Australian Securities Exchange and initially operated within the gold-mining sector. During the early 1980s, the company changed strategic emphasis, moving from gold mining toward gold exploration. This shift reflected a broader focus on identifying and developing mineral resources rather than relying only on established production. The company adopted the name Oxiana Resources in 1995 and became Oxiana Limited in 2003. Under the Oxiana identity, it developed a portfolio that combined operating mines with large-scale development and exploration projects. Its geographic reach included Australia, Laos, the Philippines and Cyprus, while later acquisitions also brought an Indonesian project into the portfolio. A central asset was the Sepon copper and gold project in southeastern Laos. Oxiana also operated the Golden Grove Mine in Western Australia and pursued development of the Prominent Hill copper-gold deposit in South Australia. These assets gave the company exposure to both producing operations and future production growth. The mix of copper and gold became central to Oxiana’s corporate profile. In June 2005, Oxiana acquired the Golden Grove Mine from Newmont. The purchase strengthened its Australian operating base and added an established mine to its broader development portfolio. In February 2007, the company launched a friendly takeover bid for Agincourt Resources. The offer was accepted in April. The acquisition expanded Oxiana’s interests to include the Wiluna Gold Mine, the Nova energy business and its uranium rights at Wiluna, and the Martabe Gold Project in Sumatra. Oxiana did not retain every asset obtained through the Agincourt transaction. In July 2007, it sold the Wiluna Gold Mine to Apex Minerals. The divestment formed part of portfolio management as Oxiana concentrated on assets and projects more closely aligned with its long-term copper-and-gold strategy. The company’s independent existence ended through a merger with Zinifex. In March 2008, the two companies announced that they intended to merge. The transaction took effect on 20 June 2008. On 18 July 2008, the combined business was rebranded as OZ Minerals, replacing Oxiana as the public corporate identity. Oxiana-related entities later appeared in regulatory reporting. In 2023, the Australian Federal Police investigated Oxiana (Cambodia) Limited, a foreign subsidiary that later became part of the OZ Minerals group, over alleged foreign bribery. This later investigation is relevant to the corporate legacy of Oxiana and its successor structures, but it does not represent a continuation of Oxiana as an independent operating company. Oxiana is therefore a defunct Australian mining brand whose historical importance rests on its copper-and-gold portfolio, its expansion into Southeast Asia, and its role in the formation of OZ Minerals.

• 2008

  Merger with Zinifex and formation of OZ Minerals

  [1]Oxiana Limiteden.wikipedia.org

  The merger with Zinifex took effect on 20 June, followed by the OZ Minerals rebrand on 18 July.

• 2007

  Agincourt acquisition

  [1]Oxiana Limiteden.wikipedia.org

  Oxiana’s friendly takeover of Agincourt was accepted, adding Wiluna, Nova and Martabe interests.

• 2007

  Wiluna divestment

  [1]Oxiana Limiteden.wikipedia.org

  Oxiana sold the Wiluna Gold Mine to Apex Minerals.

• 2005

  Acquisition of Golden Grove

  [1]Oxiana Limiteden.wikipedia.org

  Oxiana purchased the Golden Grove Mine in Western Australia from Newmont.

• 2003

  Renamed Oxiana Limited

  [1]Oxiana Limiteden.wikipedia.org

  The company changed its name from Oxiana Resources to Oxiana Limited.

• 1995

  Renamed Oxiana Resources

  [1]Oxiana Limiteden.wikipedia.org

  Golden Plateau adopted the Oxiana Resources name.

• 1980

  Strategic shift toward gold exploration

  [1]Oxiana Limiteden.wikipedia.org

  During the early 1980s, Golden Plateau moved from a primary focus on gold mining toward gold exploration.

• 1932

  Founded as Golden Plateau

  [1]Oxiana Limiteden.wikipedia.org

  The company was established as Golden Plateau and became listed on the Australian Securities Exchange.

A diversified Australian mining and exploration company focused on copper and gold production, project development and resource expansion across Australia and Southeast Asia.

• Copper and gold mining

  Sepon copper and gold project

  Sepon was Oxiana’s principal Southeast Asian copper-and-gold project in southern Laos. It formed a central part of the company’s international operating portfolio and represented its strategy of combining copper production with gold exposure in a developing mining jurisdiction.

• Australian polymetallic mining · 2005

  Golden Grove Mine

  Golden Grove was an established Western Australian mine acquired from Newmont in 2005. Its inclusion gave Oxiana a producing Australian asset and complemented the company’s copper, gold and broader base-metals portfolio.

• Copper-gold development project

  Prominent Hill

  Prominent Hill was a copper-and-gold deposit in South Australia that Oxiana was developing as a major future asset. It represented the company’s emphasis on advancing sizeable mineral deposits alongside its operating mines.

• Gold development project · 2007

  Martabe Gold Project

  The Martabe Gold Project in Sumatra, Indonesia, entered Oxiana’s portfolio through the 2007 acquisition of Agincourt Resources. It expanded the company’s Southeast Asian gold exposure beyond Laos.

• 2023

  Investigation into alleged foreign bribery

  The Australian Federal Police investigated Oxiana (Cambodia) Limited, a foreign subsidiary later associated with the OZ Minerals group, over alleged foreign bribery. The available reference identifies an investigation and allegation, not a final finding of liability.

  Source

Read more

• 2008

  Merger with ZinifexM&A

  Background

  Oxiana and Zinifex sought to combine their businesses into a larger mining group.

  Action taken

  The merger took effect on 20 June 2008, and the combined company was renamed OZ Minerals on 18 July.

  Aftermath

  Oxiana ceased to exist as an independent corporate brand and its assets continued under OZ Minerals.

  Source

• 2007

  Friendly takeover of Agincourt ResourcesM&A

  Background

  Oxiana pursued portfolio expansion through the acquisition of a company holding gold, energy and uranium-related interests.

  Action taken

  Oxiana launched a friendly bid in February 2007, which was accepted in April.

  Aftermath

  Oxiana added Wiluna, Nova and the Martabe Gold Project, then sold Wiluna later that year.

  Source

• 2005

  Purchase of Golden Grove MineM&A

  Background

  Oxiana sought to strengthen its Australian operating base with an established mine.

  Action taken

  The company acquired Golden Grove from Newmont in June 2005.

  Aftermath

  Golden Grove became one of the principal Australian operations in Oxiana’s portfolio.

  Source

1. 1Oxiana Limiteden.wikipedia.org