Finance chiefs from the world's rich powers opened an icy summit on Friday mulling how to prevent worry about deepening southern European debt from derailing an already fragile global recovery, Reuters reported. Fresh off a run on a dogsled near the remote northern capital of a Canadian territory called Nunavut, host Finance Minister Jim Flaherty acknowledged that even before all Group of Seven finance ministers and central bankers arrived Europe's debt problems were front and center. "We already had preliminary discussions on that subject," a parka-clad Flaherty told reporters even before a formal opening dinner that featured native delicacies like caribou and Arctic char. "The European (Central) Bank, of course, is here and there are concerns about Greece." The G7 includes three key European economies -- Germany, France and Italy -- that made it a natural forum for talks with the United States, Britain, Japan and Canada.