CANADA STOCKS-TSX fluctuates as Ukraine fears weigh, miners gain

* TSX up 6.38 points, or 0.04 percent, at 14,308.44 * Five of 10 main index sectors advance * CP Rail slips after share buyback plan By John Tilak TORONTO, March 11 (Reuters) - Canada's main stock index was little changed in choppy trading on Tuesday as concerns about the crisis in Ukraine were offset by a jump in gold-mining shares after the price of bullion gained. Ukraine's interim leaders formed a new National Guard and appealed to the United States and Britain for assis