* TSX down 21.74 points, or 0.14 percent, at 15,252.49 * Eight of the 10 main index sectors decline * Black Diamond drops after reporting results * Badger Daylighting is biggest percentage decliner By John Tilak TORONTO, Aug 13 (Reuters) - Canada's main stock index was little changed on Wednesday as worries about geopolitical tensions in Ukraine and weakness in the price of copper weighed.
Data indicating a slowdown in the Chinese property market hit copper prices, dragging down shares of miners such as Teck Resources Ltd and First Quantum Minerals Ltd.
Investors digested news that Ukraine had denounced Russia's dispatch of a humanitarian aid convoy as an act of unbounded cynicism, while the United Nations said the death toll in fighting had doubled in the last two weeks.
Worries about Ukraine as well as crises in the Middle East have led to volatile trading on the Toronto stock market over the past few weeks.
"This is some concern about geopolitics," said Irwin Michael, portfolio manager at ABC Funds. "You're having a lot of volatility and a lot of indecision in terms of what investors want to do." He said investors wanted to hold onto their cash and see how developments in the economy and geopolitics play out.
Michael expects the Canadian equity market to outperform U.S. stocks this year.
The Toronto Stock Exchange's S&P/TSX composite index closed down 11.50 points, or 0.08 percent, at 15,262.73. Seven of the 10 main sectors on the index were in the red.
Among miners, Teck slipped 0.8 percent to C$25.09 and First Quantum fell 1.1 percent to C$24.46.
Shares of energy producers dropped in choppy trade. Canadian Natural Resources Ltd lost 1.4 percent to C$45.09, and Encana Corp gave back 1.3 percent to C$23.38.
The industrial sector in the declined 0.6 percent, with Canadian Pacific Railway Ltd shedding 0.4 percent to C$208.07.
Black Diamond Group Ltd dropped 3.7 percent to C$28.67 after the energy services provider reported quarterly results late on Tuesday.
Secure Energy Services Inc shot up 13 percent to C$27.18, after several brokerages raised their price targets on the stock a day after the company reported quarterly results.
Badger Daylighting Ltd tumbled 24 percent to $27.25 after it reported quarterly results. The stock showed the biggest percentage decline on the index.
($1=$1.09 Canadian) (Editing by Peter Galloway and Meredith Mazzilli)