The shares in some North American silver miners fell sharply on Thursday after Bolivia's leftist government said it might rescind concessions on four mines in the country run by Glencore International Ltd [GLEN.UL] affiliates and Canada's Pan American Silver Corp (PAA.TO: Quote)(PAAS.O: Quote).

After years of frustration, Greystar Resources shareholders successfully campaigned to dump CEO Steve Kesler and the board of directors in the aftermath of continued delays in its Angostura gold-silver project in Colombia. Greystar (TSX, AIM: GSL) has been working on the development of Angostura for 15 years, investing C$153 million thus far in the US$1 billion project.

NovaGold Resources released a prefeasibility study today on its 100%-owned Ambler project in northwest Alaska. The Vancouver-based company is exploring the sprawling 36,670-hectare property, which is host to a number of high-grade copper, zinc, lead, gold and silver deposits. According to the PEA, commissioned by SRK Consulting, the property contains 16.8 million tonnes of indicated resources, with 4.1% copper and 6.0% zinc. The inferred category contains 12.1 million tonnes of 3.5% copper and 4.9% zinc.

Hopeful prospectors and artisanal miners are searching remote areas of Sudan’s desert for a chance at riches but, the government is beginning […]

The heavy rains that have kept much of N. Australia waterlogged for months have also resulted in the suspension of one of […]

The world’s number one silver miner reported record gold production for the first quarter even as silver production numbers declined.

Glencore International plc plans to raise up to $12.1 billion in a London and Hong Kong IPO, according to a term sheet seen by Reuters on Thursday, cashing in on a resources boom and giving the trading giant the fire power to grow through acquisitions. The much anticipated initial public offering, set to value the company at up to $60 billion, will mark the end of four decades of closely guarded privacy for the world's biggest commodities trading company.

MiningNews.net reports that the Cut, a simulated underground training mine in Perth, is attracting attention from mining specialists all over the world. Training specialist Barminco is arranging several tours in the next few weeks, with visitors from as far afield as Chile.

"We’ve put a bit of time and money into setting this up," Barminco training co-coordinator Steve Motion said. "From an induction point of view, I think it will be a pretty good idea for putting what we call green people or new people through, just to give them that feeling of what it’s like to go underground and how an underground mine works."

Harmony Gold (HARJ.J: Quote) said on Wednesday that its gold production for the March 2011 quarter would likely be two percent lower than the previous quarter mainly due the impact of the Christmas break. It did not give figures in a brief guidance to investors but it said cash operating costs remained steady and capital expenditure was contained during the quarter.