LONDON :Oil prices dipped slightly on Monday as loadings resumed at Russia's Novorossiysk export hub after a two-day suspension at the Black Sea port that had been hit by a Ukrainian attack. Brent crude was down 5 cents at $64.34 a barrel by 1254 GMT. U.S. West Texas Intermediate (WTI) crude lost 8 cents to $60.01.  Both benchmarks rose more than 2 per cent on Friday to end the week with a modest gain after exports were suspended at Novorossiysk and a neighbouring Caspian Pipeline Consortium