* TSX down 12.52 points, or 0.1 percent, at 12,104.40 * Gold miners' strength keeps index near even * Energy and banking heavyweights push down By Alastair Sharp TORONTO, Aug 22 (Reuters) - Canada's main stock index dipped slightly on Wednesday as banks and energy stocks weighed, but resurgent gold miners helped the market hold its ground. The four biggest positive influencers on the index were all gold producers, which have been among the worst performers so far this year. "Golds are about to do what the technicians call a long-term break out and reverse this downtrend they've been in for months," said John Ing, president of Maison Placements Canada. The price of bullion rose for a sixth day, driven higher by hopes for further stimulus from major central banks. Barrick Gold Corp gained 0.8 percent to C$36.76, Goldcorp Inc rose 0.6 percent to C$39.12 and Yamana Gold Inc and Eldorado Gold Corp each added more than 1 percent. At 10:25 a.m. (1425 GMT) the Toronto Stock Exchange's S&P/TSX composite index was down 12.52 points, or 0.1 percent, at 12,104.40. Heavyweight banking and energy stocks kept the index in the red, with Royal Bank of Canada down 0.6 percent at C$53.72 and Suncor Energy 1 percent lower at C$31.87. Japan's exports slumped the most in six months in July as shipments to Europe and China tumbled, adding to concerns over global demand after a string of dire trade figures from Asia's export engines. In a sign of belt-tightening after rising commodity prices excited the industry, top global miner BHP Billiton delayed its planned $20 billion Olympic Dam copper expansion and said no major projects would be approved before June 2013. "These mega-projects can bring mega-problems. There's a huge capital risk," Ing said. Canadian retail sales dropped unexpectedly in June, confirming a weaker trend in consumer spending that will likely trim overall growth in the second quarter and raises questions about the Bank of Canada's hawkish slant on monetary policy.