Mining group Central African Gold has had its loan facility increased from $2m to $5m by its major shareholder, New Dawn Mining, in order to support the group's ongoing operational and working capital requirements. Shares in Texas-focused oil explorer Pantheon Resources rose after it announced that the problems that caused delays to drilling in the Tyler County programme are easing, representing the prospect for an "entire transformation of the company," says non-executive chairman Sue Graham.The group experienced delays at the site for the past two months due to a shortage of suitable specialised drilling rigs and rising costs, but the group now says the KF#1H well is expected to spud by the end of January 2011.Namibia-focused explorer Kalahari Minerals, one of the largest capitalised companies listed on AIM, is to move to the main market."After a very successful four years on AIM, Kalahari has now reached a size and stage of maturity such that the Board believes the Official List is the most appropriate platform for its future growth. We are confident that this move will provide the company with greater share liquidity, enhanced market exposure and a wider shareholder base, befitting to a company of Kalahari's increased profile," said executive chairman Mark Hohnen.European Nickel shares tumbled as the group decided to mothball its Caldag project in Turkey until it receives the appropriate forestry permit. Upon receipt of the permit, the board will re-assess the situation in light of the progress and development of the Acoje project, it said. The Caldag off-take contract with BHP Billiton for 100% of the mixed hydroxide product has been terminated. "We cannot tread water indefinitely at Caldag until the permit is re-issued, and the board believes that our efforts and resources are better deployed at Acoje in the meantime," European Nickel said.Ocean Power Technologies posted a net loss of $11.8m for the six months ended October compared to $7.3m for the same period in the prior year. Revenues rose 71% to $3.2m. The growth in revenues primarily reflects an increase in revenues from the US Navy under the LEAP program, OPT said.