Sulliden Gold Corporation Ltd. (TSX:SUE)(OTCQX:SDDDF) has completed a new gold and silver mineral resource estimate for its 100%-owned Shahuindo Project in Peru. The updated estimate delivered a 121% increase of indicated gold ounces in the oxides and a 397% increase in inferred gold ounces from the sulphides relative to the 2009 year-end estimate. Sulliden continues to actively drill the Shahuindo property and new results will continue to be released throughout 2011. Image of the Shahuindo Project by Sulliden Resources

Arch Coal has completed its acquisition of International Coal Group through a merger, with ICG becoming a wholly owned subsidiary of Arch. The aggregate value of the transaction totalled $3.4 billion. The acquisition adds nearly 13 Mt of low-cost Appalachian thermal coal production to Arch’s vast domestic thermal coal portfolio, solidifying the company’s number two position among US-based coal miners. With expected metallurgical coal sales of 11 Mt in 2011, Arch also becomes the second largest US metallurgical coal producer and a top ten global supplier to steelmakers. By capitalising on expansion opportunities, Arch expects to boost its metallurgical coal output to nearly 15 Mt by 2015.

Vaaldiam Mining net loss more than tripled in the first quarter to $7.6m after suspending operations at the Duas Barras diamond mine in Brazil. By close of trade on Wednesday shares in the company had fallen 21%, close to an all-time low leaving it with a market capitalization of a paltry $12m, a far cry from the $150m-plus valuation it commanded a decade ago. Vaaldiam said it will now focus on the development of the Brauna mine in Brazil after it paid $6.5m to increase its stake in the project to 51% in March. It has two other diamond mines in the country that are on care and maintenance.

World no.2 iron ore miner Rio Tinto is investing $676 million to speed up its iron ore expansion by six months to capture demand as rival plans to boost production are impeded. Rio said on Wednesday it expects to increase its capacity by 50 percent to 333 million tonnes a year by the first half of 2015.

Mining Weekly reports Zambia is keen to diversify its mining sector and wants more exploration in iron-ore, manganese, coal and uranium, Vice-President George Kunda said on Wednesday. Speaking at a mining conference in Lusaka, Kunda said that the Zambian economy was too dependent on copper. Zambia aims to be the third-largest uranium producer in Africa in the near future, Kunda said, adding that this would depend on exploration and investment.

Shares in Vancouver-based Great Panther Silver on Wednesday continued to soar after the company reported record revenues and profits a day earlier. Shortly before the close the company which owns 100% of two silver mines in Mexico was up 8.5% in a broadly weaker market and on a tough day for other silver counters. Tuesday's results showed net income up $6m to $7m for the first quarter and a 95% increase in revenues to $15.5m. The company listed in February this year and raised $24.2m in April in a closed equity offering. A day before the results announcement investor site Motley Fool said the counter was "poised to pop."

Buying in China and India, central banks increasing reserves and particularly dwindling gold production could potentially drive the gold price to US$5,000/oz says a new report by investment bank Standard Chartered. The report, which studied 375 mines around the world, also shows that while exploration budgets have steadily risen since 2002 (with the exception of 2009) in response to rising prices, the rate of new gold discoveries have continued to decline.

Eritrean National Mining Corp. has agreed to pay US$32 million for a 30 percent stake in Chalice Gold Mines' Zara gold project, Bloomberg reported Wednesday:

According to the latest BP Statistical Review of World Energy coal consumption grew by 7.6% in 2010, the fastest global growth since 2003. Coal now accounts for 29.6% of global energy consumption, up from 25.6% 10 years ago and the highest since 1970. Chinese consumption grew by over 10% and China last year consumed nearly half of the world’s coal. In contrast just 1.8% of global energy consumption comes from renewable sources such as hydroelectricity, biofuels, wind and nuclear power stations. The comparative figure a decade ago was 0.6%.