* Gold up nearly 2 pct on buy-backs after sell-off on oil
* Silver up more than 4 pct, platinum up nearly 5 pct
* But traders careful about buying heavily on strong dollar (Updates prices to late afternoon, adds background)
By Chikafumi Hodo
TOKYO, Aug 18 (Reuters) - Gold rallied nearly 2 percent to above $800 an ounce on Monday as the dollar slipped from highs against the euro and oil prices rose, fuelling active short-covering after heavy sell-offs last week.
Silver jumped more than 4 percent, and platinum and palladium rallied nearly 5 precent also on technical buy-backs, after heavy sell offs last week hammered them down to multi-month lows.
Precious metals prices were mainly up due to technical short-covering, but many investors were careful about buying too actively amid concerns over a slower economy and a strengthening dollar, traders said.
"Gold rebounded mainly on technical short-covering," said Shuji Sugata, manager at Mitsubishi Corp Futures and Securities Ltd in Tokyo.
"Gold and other metals have recovered a bit, but it's still early to say they will recover continuously. Gold and oil prices are still in a downward trend," Sugata said.
As of 0640 GMT, spot gold <XAU=> was trading at $800.25/801.75 an ounce, up 1.6 percent from $787.65/789.25 late on Friday in New York. It touched an interday high of $801.55.
COMEX gold futures rallied on Monday after falling nearly 3 percent in New York on Friday. The most active December contract <GCZ8> traded $13.1 higher at $805.20, up 1.7 percent from the New York settlement.
In Japan, the benchmark June 2009 contract on the Tokyo Commodity Exchange <0#JAU:> was trading at 2,850 yen per gram, up 37 yen or 1.3 percent from Friday.
A recovery in oil prices and the dollar's slight falls from highs encouraged active short-covering in precious metals, but traders were nervous about buying too strongly due to the U.S. currency's underlying bullishness against the euro.
"Gold and precious metals have been oversold and the pace of falls was clearly too rapid. Gold is gaining some support with end-users also showing demand on price dips," said Hiroyuki Kikukawa, an analyst at IDO Securities.
Spot gold dropped to as low $773.90 on Friday, the lowest since Nov. 20. The spot price dropped about 10 percent last week.
"Active sell-offs may slow, but a rapid recovery is also not expected as there is plenty of selling interest if gold rises back to around $850," Kikukawa said.
Oil rose over $1 to above $115 a barrel as investors eyed a potential supply threat from Tropical storm Fay to oil and gas production in the Gulf of Mexico.
U.S. light crude for September delivery <CLc1> was up $1.28 at $115.05 a barrel. The contract settled down $1.24 at $113.77 a barrel on Friday, after dipping to $111.34, the lowest level since May 2. [
]The dollar hit a six-month high against the euro on Monday then slipped as oil prices rebounded, but worries about the euro zone economy stalling kept its losses limited. [
]Silver jumped more than 4 percent on Monday, advancing in line with gold on short-covering following heavy sales last week.
Silver <XAG=> was at $13.24/13.30 an ounce compared with $12.74/12.84 in late Friday New York trade. It hit an intraday high of $13.29.
Platinum <XPT=> was trading at $1,425.50/1,445.50 an ounce, up 4.7 percent from $1,365.00/1,385.00 in New York.
Palladium <XPD=> jumped to $289/297 an ounce from $281/289 on Friday. Precious metals prices at 0638 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 801.10 15.60 +1.99 -3.79 Spot Silver 13.26 0.57 +4.49 -10.22 Spot Platinum 1425.50 64.00 +4.70 -6.22 Spot Palladium 289.00 9.00 +3.21 -21.47 TOCOM Gold 2854.00 41.00 +1.46 -6.73 44510 TOCOM Platinum 5056.00 -40.00 -0.78 -5.30 22197 TOCOM Silver 475.80 -21.00 -4.23 -12.05 1510 TOCOM Palladium 1057.00 -10.00 -0.94 -21.76 886 Euro/Dollar 1.4744 Dollar/Yen 110.13 (Reporting by Chikafumi Hodo)