LONDON, Aug 23, 2011 (Dow Jones) -- The global refined lead market was in a 100,000-metric-ton surplus in the first six months of 2011, the International Lead and Zinc Study Group said Tuesday.

That compares with a 69,000-ton surplus in the same period last year.

In January to June, total production was 4.975 million tons of refined lead.

Consumption was 4.875 million tons, the ILZSG said.

The refined lead market was in a 5,000-ton deficit in the western world during the same period, with output of 2.544 million tons and demand of 2.549 million tons.