GENEVA (Reuters) - Russian Deputy Foreign Minister Gennady Gatilov said on Tuesday that a U.N. Security Council resolution put forward by Western powers to sanction Syria's government over the alleged use of chemical weapons would have a negative impact on peace talks.

"It is counter-constructive," Gatilov told reporters. "The climate will be negative, not because we will veto it, but because this resolution was put forward."

The Security Council will vote later on Tuesday on a resolution drafted by France, Britain and the United States to ban the supply of helicopters to the Syrian government and to blacklist Syrian military commanders.

(Reporting by Tom Miles; Writing by John Irish; Editing by Catherine Evans)