* Mideast unrest, soft dollar, euro zone nerves lift prices * Prices head for quarterly gain, but smallest since Q3 2008 * Markets fret over U.S. monetary policy ahead of jobs data
(Updates with comment, refreshes prices)
By Jan Harvey and Amanda Cooper
LONDON, March 31 (Reuters) - Gold was set for a tenth straight quarterly gain on Thursday, rising by nearly 1 percent as the dollar weakened and concern over euro zone sovereign debt and unrest across the Middle East encouraged buying.
Low real interest rates and high liquidity left by the world's central banks' quantitative easing programmes have been major drivers for gold, although its performance this quarter is set to be its weakest since the third quarter of 2008, before the financial crisis took hold.
The prospect of monetary tightening in the United States and the euro zone has undermined some of the appeal for gold, which has seen a net outflow 2.18 million ounces of metal, or 3.5 percent, from the major exchange-traded funds so far this year.
Spot gold <XAU=> was bid at $1,437.50 an ounce at 1401 GMT, against $1,423.38 late in New York on Wednesday. U.S. gold futures for June delivery <GCv1> rose $14.30 to $1,439.70.
"Gold just managed by a whisker to produce another positive quarter, the tenth in a row. Overall, the performance was not impressive amid the multitude of uncertainties that the world had to deal with during the first three months of 2011," said Ole Hansen, senior manager at Saxo Bank.
"A cessation (in quantitative easing programmes) could reduce the investor demand even further, but inflation is currently rising faster than expected and ... the market always moves six months ahead of the event ... a prolonged fear of inflation will have investors looking at gold again."
Investors are awaiting a report on U.S. non-farm payrolls for March due Friday, considered a key indicator of the health of the U.S. economy. Forecasts suggest the economy recorded a second month of solid job growth this month. [
]Signs the U.S. jobs market is recovering could support calls from some Fed officials to wind up the central bank's monetary easing programme earlier than expected.
"Until we see a substantial decrease in liquidity or a rise in real interest rates, you would look for an upward trend, and all these other factors like the euro zone debt and Middle East, North Africa issues are also a short-term support," said Standard Bank analyst Walter de Wet.
But he said while the bank still expects to see gold prices above $1,500 an ounce, this is unlikely to happen before the third quarter.
"We're unlikely to see massive new inflows into gold at the moment because people are uncertain about what the Fed's going to do," he said. "We are pretty certain they are not going to change interest rates for the next three quarters at least, but they may start reducing the balance sheet."
DOLLAR SLIPS
The dollar fell 0.2 percent against a basket of major currencies on Thursday. A weaker dollar makes assets priced in the U.S. currency cheaper for other currency holders. [
]The euro <EUR=> pared some gains against the dollar after sources indicated the European Central Bank will not announce plans for a new liquidity facility to help Irish banks. [
]. [ ]Rating agency Moody's warned further sovereign ratings downgrades for euro zone countries cannot be ruled out, which fed ongoing investor concern about the region's finances. [
]Concerns over euro zone sovereign debt were a major factor in last year's 30 percent gold price rise.
Oil prices also climbed, with Brent crude futures <LCOc1> heading for their biggest quarterly gain in almost two years as violence swept across the Middle East and North Africa. [
]On the supply side of the market, China's leading mined gold producer, Zijin Mining, said it expects gold prices to rise above $1,500 an ounce by year end, and said it plans to produce 62.57 tonnes of gold this year. [
]Silver <XAG=> was bid at $37.89 an ounce against $37.44. Silver is on track for a ninth consecutive quarterly gain, with a 22 percent increase in the first three months of the year, benefiting from gains in gold and expectations that industrial demand will improve.
The gold:silver ratio dropped to its lowest since 1983 on Thursday at 37.8 as silver outperformed gold.
Platinum <XPT=> was at $1,775.74 an ounce against $1,765.85, while palladium <XPD=> was at $766.97 against $751.78.
(Reporting by Jan Harvey; editing by Alison Birrane)