* Fed to buy long-dated Treasuries, stirs inflation fear
* Gold rebounds sharply from six-week lows after Fed
* Bullion supported by a tumbling dollar (Recasts, updates with FOMC decision, quotes, closing prices, changes byline)
By Frank Tang
NEW YORK, March 18 (Reuters) - Gold rebounded sharply on Wednesday as a surprise move by the Federal Reserve to buy up to $300 billion worth of long-dated U.S. government debt rejuvenated bullion's appeal as a hedge against inflation.
"Gold has moved positively on the Fed statement as this drop in the dollar has fueled gold's comeback," said James Steel, chief commodities analyst at HSBC in New York.
"I don't know if the market was entirely expecting this to occur. Gold has been very sensitive to the financial sector, so this is potentially an important development," Steel said.
An increase in money supply in the financial system following massive economic stimulus plans could lead to a sharp rise in long-term inflation, and that boded well for gold.
Spot gold <XAU=> was at $930.00 an ounce at 2:56 p.m. EDT (1856 GMT), up 1.7 percent from its last quote $914.20 in New York late Tuesday.
Earlier in the session, bullion touched a six-week low of $882.90 an ounce as risk appetite diminished.
The Fed on Wednesday said it will buy up to $300 billion worth of longer-term U.S. government debt over the next six months and expand purchases of mortgage-related debt to help ease credit market conditions. [
]"In these circumstances, the Federal Reserve will employ all available tools to promote economic recovery and to preserve price stability," the Fed said.
However, the Fed also said that, "in light of increasing economic slack here and abroad," it expects that inflation will remain subdued.
Prior to the Fed's announcement, U.S. gold futures for April delivery <GCJ9> settled down $27.70, or 3 percent, at $889.10 an ounce on the COMEX division of the New York Mercantile Exchange.
April futures, however, rebounded 2 percent to a high of $935.90 an ounce after the Fed announcement.
Gold was also supported as the U.S. dollar plunged, hitting a two-month low against the euro, after the Federal Reserve's announcement.
The euro surged above $1.34 for the first time since mid-January as analysts feared the Fed's move would flood the market with dollars and increase already large U.S. deficits.
PAULSON BUYS STAKE IN MINER
U.S. hedge fund Paulson & Co showed its confidence in the gold sector with the purchase of a $1.3 billion stake in the world's third largest gold miner, AngloGold Ashanti <AGLJ.J>, from mining group Anglo American <AAL.L>. [
]"The very fact that Paulson has made this move is going to prompt other hedge funds to look at why, and what the merits of following that with similar purchases are," said Fairfax analyst John Meyer.
"AngloGold is deep-level, higher-cost, quite highly leveraged gold mining, with good liquidity and good scale," he said. "(Paulson) clearly feel that gold is going to strengthen."
Among other precious metals, spot silver <XAG=> was at $12.84 an ounce, up 1.1 percent from its Tuesday finish of $12.70, tracking gold's sharp rebound.
Spot platinum <XPT=> rose to $1,052.50 an ounce, up 0.9 percent from its previous close of $1,043.50, while spot palladium <XPD=> was at $196.50 an ounce from its late Tuesday quote of $191.50. (Additional reporting by Jan Harvey; editing by Jim Marshall)