* Winter 2011/12 gas touches 70-pence mark * Maintenance continues to restrict offshore supply * Rebounding carbon, oil drive power prices LONDON, Aug 11 (Reuters) - British benchmark front-season gas prices rebounded to a one-week high on Thursday as oil led a recovery in energy markets on the back of a weaker dollar, defying gloomy economic indicators. The winter 2011/12 gas contract touched the psychologically imports 70-pence-per-therm mark on Thursday morning -- a four percent gain in three sessions -- and last traded at 69.75 pence at 0855 GMT. But traders were uncertain whether the rally would last. "Oil is up but not that significantly. We're possibly looking at a natural correction, it's difficult to tell at the moment though," one UK energy trader said. Brent crude prices rose above $107 dollars per barrel on Thursday morning, bouncing on the back of a weaker dollar and reversing Wednesday's late losses after eurozone debt woes spread to France. Gas for delivery in winter 2012/13 also rose, adding 0.80 pence day on day to 73.90 pence.

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