Australian shares have tumbled amid fears that the spread of the deadly coronavirus will infect global economic growth.

The benchmark S&P/ASX200 index finished on Tuesday down 96 points, or 1.35 per cent, at 6,994.5 after global markets sank on Monday as the death toll from the virus rose.

One hundred people have died since it broke out in the landlocked Hubei province of China, where 2,714 cases have been recorded.

The broader All Ordinaries index finished 104.8 points, or 1.45 per cent, lower at 7,098.4

The Australian dollar was buying 67.60 US cents, down from 68.46 US cents at the market close on Friday.