Gold and silver were adding to recent gains and taking on some safe haven status Wednesday morning amid reports of further economic weakness in the eurozone.

Spot gold was 1.21% higher as of 11:10 a.m., bid at $1,636.50. The morning high reached $1,642.20, while prices reached as low as $1,632.20, according to Kitco market data. The London afternoon reference price was fixed at $1,635 — $29 an ounce higher than last Friday’s fixed price.

Spot silver was showing a sharp 4.07% gain, bid at $29.69 an ounce. The morning high as of time of writing was $29.97, with the low reaching $29.22. Wednesday’s reference price fix of $29.36 is $1.98 above last Friday’s reference price.

First-quarter U.S. worker productivity decreased at a revised annual 0.9% rate, the most in a year, the Labor Department announced. The initial estimate was a 0.5% decline, but less output and a slight increase in hours worked led to the downward revision.

Eurozone GDP declined 0.1% in Q1 while economic activity in the broader 27-nation European Union ticked up 0.1%, Eurostat reported with the release of its second estimate. GDP growth declined 0.3% in both zones in Q4 2011.

Having shored up eurozone GDP to this point, German industrial production declined 2.2% monthly in April, Germany’s Economy Ministry reported, led by falling production of capital and consumer goods.

Gold bullion hit a one-month high of $1640 an ounce in advance of the US market open in London morning trading, up more than 7% from May’s low, BullionVault reported.

“(Gold) is consolidating last Friday’s aggressive move from $1546 to $1629,” BullionVault quoted the latest technical analysis from bullion bank Scotia Mocatta. Barclays Research noted that gold has “broken above its 2012 bear channel, adding that gold has hit ‘strong demand (in the) 1522-33 area’ on downswings over the past 12 months.”

Gold trusts were showing healthy gains, while the iShares Silver Trust had jumped higher.

• The SPDR Gold Trust (NYSE:GLD) was showing gains of around 1.15%.
• The iShares Gold Trust (NYSE:IAU) was up around 1.15%.
• The iShares Silver Trust (NYSE:SLV) was surging higher, up around 4%.

Gold and silver mining ETFs were all sharply higher.

• The Market Vectors Gold Miners ETF (NYSE:GDX) was around 2.3% higher.
• The Market Vectors Junior Gold Miners ETF (NYSE:GDXJ) was up some 3.8%.
• The Global X Silver Miners ETF (NYSE:SIL) was up around 4.45%.

Gold mining shares were showing strong morning gains as well.

• Agnico-Eagle Mines (NYSE:AEM) was up around 2.88%.
• Barrick Gold (NYSE:ABX) was around 1.4% higher.
• Eldorado Gold (NYSE:EGO) was sharply higher, up some 3.8%.
• Goldcorp (NYSE:GG) was up some 2.45%.
• Kinross Gold (NYSE:KGC) was up more than 1.9%.
• Newmont Mining (NYSE:NEM) was showing gains of around 1.25%.
• NovaGold Resources (NYSE:NG) was trading flat.
• Yamana Gold (NYSE:AUY) was around 1% higher.

Silver mining shares were up sharply, with Silver Standard Resources and Pan American Silver leading the way.

• Coeur d’Alene Mines (NYSE:CDE) was up around 3.1%.
• Hecla Mining (NYSE:HL) was nearly 4% higher.
• Pan American Silver (NASDAQ:PAAS) was up more than 5.5%.
• Silver Wheaton (NYSE:SLW) was around 3.3% higher.
• Silver Standard Resources (NASDAQ:SSRI) was surging, up some 6.4%.

As of this writing, Andrew Burger did not hold a position in any of the aforementioned securities. Adrian Ash of BullionVault contributed to this report.