London's leading share index added 0.75% in late morning trading on Monday as miners were buoyed by strong results from Randgold Resources.
The FTSE 100 was up 44 points, or 0.74%, to 6,041 by 11:30am following Friday's finish just below 6,000.
Miner Xstrata added 48p to £14.65 while Rio Tinto advanced 108p to £46.05 after gold miner Randgold Resources posted pre-tax profits of $136.14m for 2010.
Tech firm ARM Holdings, up 3.49% to 608p, and plastics giant Rexam, up 2.6% to 365p, also made significant advances.
In Europe, France's Cac 40 climbed 1% to 4,087 while the German Dax added 0.74% to 7,269.
In Asia, the Nikkei 225 reached a nine-month high, closing up 0.6% at 10,607 on the back of positive US job data, robust corporate results and a weaker yen.
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