The Wall Street Journal reports Mongolia is relaunching talks with international miners on developing the western block of Tavan Tolgoi in the South Gobi desert, the world’s largest deposit of high-quality coking coal used in steelmaking. Mongolia's National Security Council rejected a deal struck with US giant Peabody Energy, China's Shenhua and a Russian-Mongolian consortium mid-September, just two months after they were announced as winners. At the time losing bidders from Brazil, India and South Korea raised serious concerns and Japan went so far as to call the bidding process 'extremely regrettable'. Mongolia still hopes to privatize its Erdenes Tavan Tolgoi coal-mining company which controls the remainder of the 6 billion tonne resource for upwards of $3 billion next year.

News reports on Saturday say Rio Tinto's Zimbabwe subsidiary Murowa Diamonds has ceded 51% of its equity to comply with a new law that requires Zimbabweans to own the majority of foreign companies. Rio Tinto says on its website it has completed a feasibility study and received environmental go-ahead to expand Murowa production 8-fold at a cost of $200 million. Saturday's report cast serious doubts on whether the investment, which requires foreign capital, would now be made. It appeared in recent weeks as if Zimbabwe was soft-pedalling the indigenization laws, but Rio Tinto's capitulation has now put pressure on Impala Platinum, struggling to hold onto its $20 billion worth of reserves in the country.

Tucson Sentinel reports the Painted Desert of northern Arizona holds hundreds of million years of history, from fossils of dinosaur ancestors to ancient Native American dwellings, but Petrified Forest National Park and the land around it also sit on as much as 2.5 billion tons of potash. The US Congress approved expansion in 2004, authorizing the park to purchase land from willing sellers. The park added the first 26,000 acres in September, but that purchase didn’t include the mineral rights because of a lack of funds.The old and new boundaries of the park are over approximately 50% of the Holbrook basin potash deposits and three companies – Passport Potash, American West Potash and HNZ Potash – currently are drilling test holes inside and outside the park to establish the depth and quality of the deposits.

Does gold's precipitous $300 drop in September represent a fundamental market shift? It is hard to argue with this statement: "Global stock markets are volatile, central banks have not regained credibility, inflation is still a concern, and trust in the markets has not been restored. Yet gold continues to fall... Gold has lost its shine."

Centaurus Metals (ASX:CTM) slipped back to 72 cents after rising to 78 cents Thursday, on news of a positive resource estimate from its flagship Jambreiro iron ore project in Brazil. Perth-based Centaurus reported a 65% jump in iron ore from Jambreiro, to 117.5 million tonnes grading 26.8% Fe.

Copper miners in Zambia are joining their counterparts in Indonesia in demanding a rise in pay. The Wall Street Journal reports hundreds of miners at Chinese company Sino Metals downed tools Friday over wage demands.

Talvivarra Mining (LON:TALV) got massacred on the markets today on news that its CEO, Pekka Perä, has resigned. The London-listed Finnish base metal miner shed 55.83 pence to close at 198.66p — a 21.67% drop. It is clear that investors saw the departure of Perä — the driving force behind the company and its largest shareholder, owning 23% of the stock — as a major negative, says an analyst quoted in The Daily Telegraph:

Workers at Freeport's Grasberg – one of the world's largest gold and copper mines – in the remote Indonesian province of West Papua vowed Friday to paralyse production, as their strike over pay enters its second month. About 12,000 of Freeport's 23,000 Indonesian workers have joined the strike that started on Sept. 15 and on Friday Freeport said some workers have returned, putting it in a position to increase mining and milling output. The gulf between the the two parties are so wide that chances of a settlement appear remote – Freeport has offered a 25% increase on wages while the union wants the current minimum rate of $1.50 an hour raised more than 8-fold.

A new report from research firm TNS could have implications for mining. A survey of affluent households around the world — defined as greater than $100,000 — found that 80% of the world's wealthy live in Western countries.TNS's Global Affluenty Investor study conducted interviews across 24 markets including China, Brazil and India.