* Spot platinum tumbles 6 percent to near one-year low
* Tokyo platinum futures hit daily downside limit
* Gold down 1 percent, palladium down 6.5 percent (Updates prices)
By Lewa Pardomuan
SINGAPORE, Aug 19 (Reuters) - Spot platinum slid more than 6 percent on Tuesday to its lowest since mid-September last year, on waning demand from automakers and general weakness in precious metals that saw gold dip back below $800 an ounce.
Gold's fall, after rising more than 1 percent in New York in the previous session, shows the metal is vulnerable to gains in the dollar. Silver also dropped, palladium hit its lowest since mid-June 2006 and benchmark Tokyo platinum futures fell by their daily limit to a one-year low.
Spot platinum <XPT=> fell all the way to $1,297.50 from $1,386/1,406 an ounce late in New York, with falls in Japanese futures adding to selling pressure.
The most active Tokyo platinum contract for June 2009 delivery <0#JPL:> on the Tokyo Commodity Exchange dropped by the daily 300 yen limit to 4,555 yen.
"EU autommobile production decreases. Both gold and platinum continue to be bearish. Platinum may be fall to below $1,200," said Kazuhiko Saito of Interes Capital Management in Tokyo.
Platinum hit a record high of $2,290 an ounce in March after a power shortage in main producer South Africa disrupted mining and triggered supply worries.
It rallied as much as 50 percent in 2008, but has dropped more than 40 percent since hitting the record peak due to profit taking, a slowing U.S. economy and the downturn in U.S. auto sales that has raised fears of falling demand for autocatalysts, the major use for the metal.
Earlier in August, auto industry forecaster J.D. Power downgeaded its view on western European car sales after a dismal sales month in July when volumes fell 6.7 percent to 1.17 million new vehicles. [
]"From the charts, platinum seemed to have returned the premiums from the earlier South Africa crisis and in fact we are almost at one-year lows. I am looking at the $1,200-$1,250 region for support now," said Adrian Koh, analyst at Phillip Futures.
"Looks like a bad week for precious metals," he said.
Gold <XAU=> fell to $784.35/785.35 an ounce from $799.65/801.05 late in New York on Monday, when it briefly regained $800 in a technical rebound, after falling to its lowest level in nine months around $773 an ounce last week.
Gold was well below a lifetime high of $1,030.80 hit in March.
For a graphic showing platinum and gold prices, click on: https://customers.reuters.com/d/graphics/MKTS_XPTAU0808.gif
"General sentiment for gold remains weak and I guess we are likely to see more selling on strength. For near-term support, I am currently looking at the $770 region," said Koh of Phillip Futures.
"If we move below that, then the $750s will be a very important level to look at," he said.
The dollar index, which gauges its performance against six major currencies, hit a seven-month high above 77.413 <.DXY>.
New York gold futures <GCZ8> fell $15.4 an ounce to $790.30.
Spot palladium <XPD=> fell to $264.50/272.50 an ounce from $283.00/291.00 an ounce. Silver <XAG=> slipped to $12.56/12.62 an ounce from $13.07/13.13 an ounce. Precious metals prices at 0629 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 786.00 -12.55 -1.57 -5.61 Spot Silver 12.59 -0.59 -4.48 -14.76 Spot Platinum 1298.00 -85.00 -6.15 -14.61 Spot Palladium 264.50 -25.50 -8.79 -28.13 TOCOM Gold 2801.00 -32.00 -1.13 -8.46 54225 TOCOM Platinum 4567.00 -288.00 -5.93 -14.46 29667 TOCOM Silver 450.50 -14.80 -3.18 -16.73 1120 TOCOM Palladium 956.00 -62.00 -6.09 -29.24 1872 Euro/Dollar 1.4639 Dollar/Yen 110.27 TOCOM prices in yen per gram, except TOCOM silver which is priced in yen per 10 grams. Spot prices in $ per ounce. (Editing by Ben Tan)