(All figures in Canadian dollars unless noted)
CALGARY, Alberta, Sept 17 (Reuters) - ICE (NYSE:ICE) Canada canola futures weakened slightly on Tuesday, paring gains after a week-long rally:
* The benchmark November canola futures contract RSX9 closed 20 cents lower at $452.50 per tonne after failing to match Monday's three-week high of $452.70.
* The contract faced technical resistance at its 100-day moving average.
* One market source said canola had benefited from short-covering from commodity funds in recent days and remained above its 40- and 50-day moving averages.
* The November-January RSX9-F0 canola spread traded 4,981 times, closing at a $8.40 January premium, unchanged from a day earlier. The January-March spread RSF0-H0 traded 2,759 times.
* Chicago Board of Trade November soybeans SX9 ended 6-1/4 U.S. cents lower at US$8.93-3/4 a bushel, while CBOT December soyoil BOZ9 lost 0.29 cent to end at 29.99 U.S. cents per pound, tracking a decline in crude oil futures. SOY/C
* The Canadian dollar weakened against its U.S. counterpart on Tuesday as oil prices fell and domestic data showed a bigger-than-expected drop in manufacturing sales for July. CAD/