For the villagers who live in this mostly treeless region of fiords, icebergs and polar bears, the case was a victory that forces the national and territorial governments to consult them over the use of their homeland. The decision comes as Canada, Alaska and other Arctic regions are deciding whether to allow oil and gas development in Arctic waters that are covered by ice for nine or more months each year.
"We've been saying all along that we aren't anti-development, we aren't anti-science," said Okalik Eegeesiak, the president of the Qikiqtani Inuit Association, which asked the court of Nunavut Territory to block the geological study. "But we want to be involved, to be sure our environment and our wildlife are protected as much as possible."
Many Inuits depend on hunting, fishing and trapping to feed their families, both for cultural reasons and because food shipped above the Arctic Circle is so expensive. After the Canadian government told the people on Lancaster Sound — the villagers' traditional hunting area — that it planned to conduct the seismic tests, everyone who attended meetings in May opposed the testing, Eegeesiak said.
They were concerned about the immediate impact of the tests on wildlife, but the BP oil blowout also was on everyone's mind, she said.
"We saw every day on TV how difficult it was to contain the spill in the Gulf of Mexico," she said, noting that a spill in the ice and minus-40-degree temperature of winter would be impossible to stop.
Canada, like the U.S., is wrestling with how quickly to push into the Arctic for oil and gas.
Quite possibly, Lancaster Sound, a place that teems with wildlife, will be spared. The government of Canada announced in December that it planned several years of study to determine whether to make the region a marine conservation area.
Most of the world's narwhals and some 40 percent of its beluga whales travel through the sound and feed and give birth in its waters. Rare bowhead whales are there, too, along with many walruses and seals. Millions of birds of many species nest nearby in great concentrations, including ivory gulls, phalaropes and snow geese.
Tourists visit to see the birds, whales, polar bears and icebergs, ride dog sleds over the ice or hunt for musk ox and polar bears.
Canada's minister in charge of environmental affairs and parks, Jim Prentice, said in July that the government remained committed to the idea of a marine park but wanted to go ahead with the seismic mapping to help determine its boundaries.
On Aug. 8, however, the Nunavut Court of Justice blocked the seismic mapping in Lancaster Sound a day before the icebreaker Polarstern was scheduled to begin its work.
Justice Susan Cooper noted that Inuit representatives said the seismic testing would harm and drive off the marine mammals they hunted. The Canadian government argued that the testing would have little or no impact. The judge weighed the evidence and ruled that the government's assurances weren't so clear-cut.
"If the testing proceeds as planned and marine mammals are impacted as Inuit say they will be, the harm to Inuit in the affected communities will be significant and irreversible," she wrote in the ruling. "The loss extends not just to the loss of a food source, but to a loss of culture. No amount of money can compensate for such a loss."
The German research organization that's conducting the expedition, the Alfred Wegener Institute, said it was waiting to hear from Canadian officials. The Lancaster Sound seismic study was supposed to be part of a longer expedition to understand the geology and history of the Arctic Ocean, institute spokesman Ralf Roechert said. The rest of the trip is proceeding as planned.
Roechert said the scientists on the icebreaker used the best equipment available for seismic testing and made sure that the work didn't harm marine life. "In over 20 years, no incident has been detected," he said.
Wegener officials have said that the seismic study planned on the Polarstern wasn't the type that was needed for targeted oil and gas explorations.
The Pew Environment Group, which advocates creating the marine conservation area, argued that seismic testing wasn't necessary to create a marine park. The Inuit association said that underwater mapping for a park already was done in 1989. The Inuit have rights under their land agreement with Canada to continue hunting, fishing and trapping and to be part of decision-making.
"This is a controversy about oil and gas," said Scott Highleyman, the director of Pew's Arctic program. "Now that the judge has ruled, we're looking forward to working constructively with both the Inuit and the government on creation of a park in Lancaster Sound — something we are all in agreement about — to prevent this kind of conflict in the future."
Even that, however, might not protect Lancaster Sound entirely from the risk of an oil spill. International companies increasingly are exploring for oil and gas in nearby western Greenland.
Meanwhile, the next move on Arctic drilling in Alaska is expected soon.
The Interior Department is expected to announce whether it will make any changes to the Bush administration's five-year plan for offshore drilling, which runs from 2007 to 2012.
The Obama administration must decide whether it will sell any more leases in the Beaufort and Chukchi seas, whether to withdraw Bristol Bay from potential leasing and whether to leave in place 215 leases that were sold to oil companies for the Chukchi Sea in 2008.