Showing posts with label Copper. Show all posts
Showing posts with label Copper. Show all posts

Newmont Mining Selling Indonasian Mine for $1.3 Billion

An aerial view of Bitu Hijau Open pit Copper and Gold mine.

U.S. gold producer Newmont Mining Corp. said Thursday that it would sell its 48.5% economic interest in the operator of the Batu Hijau copper and gold mine in Indonesia to local company PT Amman Mineral Internasional for $1.3 billion.

The announcement came as Indonesian-listed oil and gas company PT Medco Energi Internasional Tbk said it had acquired a controlling stake in PT Amman for $2.6 billion.

A group of Indonesian investors led by Medco had earlier expressed interest in purchasing as much as 76% of the mine operator, PT Newmont Nusa Tenggara. Medco said Thursday that it would join forces with an investment firm led by banker Agus Projosasmito and receive funding for the purchase from Indonesia’s three largest state-owned banks.

Japan’s Sumitomo Corp., Newmont’s partner in Newmont Nusa Tenggara, has also agreed to sell its ownership stake to PT Amman.

Newmont said the sale of its stake at “fair value aligned with its strategic priorities to lower debt, fund highest margin projects and create value for shareholders.”

“Our goal is to build a portfolio of long-life, low-cost assets with the technical, social and political risks we are well-equipped to manage,” Newmont Chief Executive Gary Goldberg said in a conference call to discuss the transaction, noting that earlier divestments have lowered risk.

The sale will involve a closing payment of $920 million and contingent payments of up to $403 million, Newmont said. Globally, Newmont has gained $1.9 billion from sales of noncore assets since 2013.

The latest deal, which is expected to close in the third quarter, comes as miners world-wide are re-evaluating their assets, having been hit by a slump in commodities prices. In early June, mining giant BHP Billiton Ltd. agreed to sell its 75% interest in Indonesia’s IndoMet Coal to local producer PT Alam Tri Abadi, in a move to pursue other growth options that BHP said were more attractive for future investment.

Colorado-based Newmont and Sumitomo operate the Batu Hijau copper and gold mine on the island of Sumbawa in Western Indonesia.

The mine—one of Indonesia’s largest copper deposits—has been a largely profitable venture for Newmont since it started commercial operations there in 2000.

Keeping production up, however, will require a hefty investment in the next phase of development at a time when Newmont has been hit by increasingly burdensome regulation and uncertainty about the future of its operating contract.

Jorge Beristain, a metals and mining analyst at Deutsche Bank, estimated that around $1.6 billion is needed for the next stage of expansion.

The company said its debt burden would “improve significantly” without Batu Hijau.

Some analysts had earlier said Newmont’s efforts to sell off its stake also suggests concerns about the long-term outlook for the Indonesian mining industry.

Vast deposits of copper, nickel and coal have lured foreign miners to Indonesia for decades and mining has contributed greatly to economic growth in the country. But growing nationalism and the desire among some officials to grab back control of the country’s natural resources has raised risks.

Rules issued in recent years have pushed foreign miners to divest majority stakes, pay higher taxes and royalties and invest in processing unrefined ores. By law, miners are also required to eventually shift from long-term contracts of work to a licensing system. Analysts and miners say the rules make little sense at a time when miners globally are re-evaluating their investments and Indonesia is trying to draw in more foreign capital.


After the rule banning the export of unrefined ores took effect, Newmont ceased exports and later declared force majeure on existing contracts. To receive an export permit—a biannual process—the U.S. Company has had to show it is making progress on refining or stop its shipments. Delays in shipments in 2015 caused Newmont’s fourth-quarter revenue to fall 10% from a year earlier.

New technique to discover copper deposits

Magmatic rock which formed large porphyry deposit in Chile.

A geologist at the University of Exeter has developed a new and relatively inexpensive way to establish whether certain types of magmatic rocks are more likely to contain valuable metal deposits.
In a study published in Nature Geoscience, Dr Ben Williamson, of the University’s Camborne School of Mines, together with Dr Richard Herrington from the Natural History Museum, London, have proposed a new method to explore for porphyry-type copper deposits. These deposits provide around 75 per cent of the world’s copper and a significant amount of molybdenum and gold which makes them extremely important to the world economy. The deposits, which originally form at several kilometres depth below the Earth’s surface, above large magma chambers, are relatively rare, particularly the largest deposits which are most economic to mine. In addition, most near-surface deposits have already been discovered. Any new method to locate deeper deposits is therefore of great interest to the mining industry.
The project, funded by Anglo American, a major global mining company, compared the chemical compositions of minerals from magmatic rocks that host porphyry deposits against those which are barren. A case study was then undertaken of a major new porphyry discovery in Chile, to test their theory. Minerals from magmatic rocks which host porphyry deposits have distinctive chemical characteristics which can be used as one of a suite of indicators to home-in on porphyry deposits. Unravelling the causes of the distinctive chemical signatures has also brought new insights into the formation of porphyry copper deposits, and more generally the generation of the magmatic rocks from which they form, which are an important component of the Earth’s crust. The main finding in this regard is that the magma chamber below the porphyry undergoes discrete injections of water-rich melts or watery fluids which enhance the magma’s ability to transfer copper and other metals upwards to form a porphyry copper deposit.
Dr Ben Williamson, of the University of Exeter’s Camborne School of Mines, said: “This new method will add to the range of tools available to exploration companies to discover new porphyry copper deposits. Our findings also provide important insights into why some magmas are more likely to produce porphyry copper deposits than others, and add to our understanding of how their parent magmatic rocks evolve.”