The voyage, led by polar explorer and Russian legislator Artur Chilingarov, has some scientific goals, including the study of Arctic plants and animals. But its chief goal appears to be advancing Russia's political and economic influence by strengthening its legal claims to the huge gas and oil deposits thought to lie beneath the Arctic sea floor.
Russian scientists hope to dive in submarines to a depth of more than 13,200 feet, and drop a metal capsule carrying the Russian flag onto the sea bed. Balyasnikov said the dive was to start this morning.
The symbolic gesture, along with geologic data being gathered by expedition scientists, is intended to prop up Moscow's claims to more than 460,000 square miles of the Arctic shelf -- which, by some estimates, may contain 10 billion tons of oil and gas deposits.
About 100 scientists aboard the Akademik Fedorov research ship are specifically looking for evidence that the Lomonosov Ridge -- a 1,240-mile underwater mountain range that crosses the polar region -- is a geologic extension of Russia, and therefore can be claimed by it under the U.N. Convention on the Law of the Sea.
The expedition reflects an intense rivalry between Russia, the United States, Canada and other nations whose shores face the polar ocean for the Arctic's icebound riches.
The US State Department noted that Russia has not yet made public the research allegedly backing its position and said the best available scientific evidence suggests the ridges in question are oceanic by nature "and thus not part of any country's continental shelf."
"While the United States remains skeptical, we have not had the opportunity to examine any of the recently obtained data," said Leslie Phillips, a department spokeswoman.
The U.S. Senate has not yet ratified U.S. accession to the Law of the Sea, which would give Washington a seat on the panel that will consider and eventually rule on the Russian claim.
Phillips said the Bush administration would continue to press hard for ratification in order to give the United States a voice on the commission.