BEIJING, Jan 23 (Reuters) - * China's December refined copper output rose by 4.5 percent year-on-year to 839,000 tonnes, its highest monthly total in 2018, the National Bureau of Statistics said on Wednesday. * The bureau typically does not provide individual numbers for January and February due to the impact of Chinese New Year * China 2018 refined copper up 8 percent y/y at 9.03 million tonnes - stats bureau * China Dec lead output soars 30.5 percent year-on-year to 561,000 tonnes - stas bureau * Figure is the highest in stats bureau records going back to 1995, beating the previous record of 484,000 tonnes set in November. * China 2018 lead output up 9.8 percent year-on-year at 5.11 million tonnes - stats bureau * China Dec zinc output down 1.7 percent y/y at 509,000 tonnes - stats bureau * China 2018 zinc output down 3.2 percent y/y at 5.68 million tonnes - stats bureau * China Dec iron ore output up 3.3 percent y/y at 68.42 mln tonnes - stats bureau * China 2018 iron ore output down 3.1 percent at 763.37 million tonnes * China Dec alumina output up 19.6 percent y/y at 6.21 mln tonnes - stats bureau * China 2018 alumina output up 9.9 percent y/y at 72.53 million tonnes - stats bureau