CANADA STOCKS-TSX index slumps as commodities retreat
* Energy sector falls 6.8 percent as oil slides
* Materials sink 6.9 percent as metal prices fall
* Canadian Natural off 11.6 pct as project costs rise (Adds quote, details)
By Jennifer Kwan
TORONTO, Nov 6 (Reuters) - The Toronto Stock Exchange's main index dropped more than 3 percent on Thursday as energy and materials issues fell along with commodity prices, which were pressured by worries about a faltering world economy.
The oil and gas sector dropped 6.8 percent as the price of oil sank to $60.77 a barrel on fears that economic softness would undercut global demand. [ID:nSYD166191]
The materials group sank 6.9 percent with Potash Corp of Saskatchewan POT.TO down 7.6 percent at C$94.25.
Stocks that weighed on the TSX index included Canadian Natural Resources (CNQ.TO: Quote), down 11.6 percent at C$53.40. Canadian Natural was a major drag as it said it would slash spending next year. [ID:nBNG401176]