* Gold futures, spot rise above $1,000/ounce
* Investors turn to gold as refuge from economic fears
* Near-record highs seen as source of caution
* SPDR Gold holdings <XAUEXT-NYS-TT> steady
By Chikako Mogi
TOKYO, Sept 8 (Reuters) - Spot gold and U.S. futures topped $1,000 an ounce for the first time in six months on Tuesday as the dollar's weakness and concerns about the sustainability of the global economic recovery underpinned sentiment.
Some market players were cautious about prices sustaining such highs, however, saying the rally had been driven by speculators and gold was an expensive buy in historical terms.
Futures have topped $1,000 nine times -- three times this year and six last year, including a record $1,033.90. Spot gold has risen above $1,000 just five times -- on Tuesday, in February and three times in March 2008, when it hit a record $1,030.80.
"Gold's rising price is due to uncertainty all the way from personal investors right through to institutions," said Sandra Close, an analyst for gold research group Surbiton Associates.
"There are questions out there over the health of economies, where interest rates are going. All that encourages gold hoarding. There's potential to see the price go even higher.".
Spot gold <XAU=> rose as high as $1,002.55, its highest since February, when it briefly topped $1,000. New York's notional close was $993.85.
U.S. gold futures for December delivery <GCZ9> extended gains to $1,004.80. Futures settled at $996.70 on Friday. U.S. markets were closed on Monday for the Labor Day holiday.
ARE HIGH LEVELS SUSTAINABLE?
Despite gold hitting $1,000, it is far from an inflation-adjusted record, which analysts at GFMS have put as high as $2,079 per ounce.
Some analysts have said the higher gold price reflects uncertainty across markets about how central banks will untangle themselves from global fiscal stimulus aimed at reviving economic growth, as well as dollar weakness.
The Group of 20 finance ministers and central bankers said at the weekend they would not remove economic stimulus until the global recovery was well entrenched. [
]Others said buying momentum could wane to push prices back towards $950 before consolidating, given weak physical demand and a tendency by big Asian consumers to sell when prices rise.
"I don't know if it will stay there for a particularly long (period). My view is that by the end of the year the gold price will be lower, probably down to around $950 an ounce," said David Moore, a commodities strategist at Commonwealth Bank of Australia.
A confluence of dollar weakness -- making the metal more attractive to non-U.S. investors -- and doubt about the sustainability of global economic recovery have prompted a spate of investors to seek refuge in gold.
The dollar held around 93 yen <JPY=>, although it was slightly lower on a basket of currencies <=USD> in early trade. The dollar index <.DXY> is resting on trendline support at 78.00 and a sustained break lower would be quite bearish technically.
Along with currencies, analysts were watching stock markets to gauge gold's direction. A sell-off in equities on concerns about the economy could boost gold's safe-haven appeal.
"The gold market has legged up into a new range, but we need to see it sustain at $1,000 for a few days to write a new long-term story," said Mark Pervan, a senior commodities analyst at ANZ Bank.
"Gold bulls are easily spooked around these numbers and need to see them sustained to bolster confidence. Gold is rallying on fears of an equity retreat. The risk is that stocks will fall and people are hedging that by buying gold," he said.
Asian stocks were up marginally on Tuesday.
For a graphic on gold futures versus the S&P index click: http://graphics.thomsonreuters.com/099/CMD_GLDSP090.gif
Traders said volume was not large and as futures slipped soon after hitting the key level, and with spot struggling to extend gains towards $1,000, prices might languish during Asian trade.
"I think these high levels could trigger selling ... and it might be difficult for gold to sustain the $1,000 level," said Shuji Sugata, a manager at Mitsubishi Corp Futures & Securities in Tokyo.
Investment flows took a break, with the world's largest gold-backed exchange-traded fund, the SPDR Gold Trust <GLD>, saying holdings stood at 1,077.63 tonnes as of Sept. 7, unchanged from Friday. [
]The dollar steadied after falling the previous day as the weekend meeting of G20 finance chiefs boosted investor appetite for growth-related "riskier" assets like commodities and stocks. [
] <FXNEWS>In other metals, silver hit a 13-month high of $16.51.
PRICES
Precious metals prices at 0630 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 1001.00 7.15 +0.72 13.73 Spot Silver 16.66 0.37 +2.27 47.17 Spot Platinum 1265.50 10.50 +0.84 35.78 Spot Palladium 291.00 -0.50 -0.17 57.72 TOCOM Gold 2991.00 8.00 +0.27 16.25 42968 TOCOM Platinum 3772.00 -3.00 -0.08 42.23 9365 TOCOM Silver 495.20 9.60 +1.98 55.09 529 TOCOM Palladium 870.00 -13.00 -1.47 58.18 588 Euro/Dollar 1.4367 Dollar/Yen 92.60 TOCOM prices in yen per gram, except TOCOM silver which is priced in yen per 10 grams. Spot prices in $ per ounce. (Additional reporting by Jim Regan, Miho Yoshikawa and Lewa Pardomuan; Editing by Rodney Joyce and Sambit Mohanty)