The FTSE 350 mining index fell 4.61 per cent to 8,234.14 points this afternoon as copper prices tumbled.
Glencore shares shed 9.52 per cent to 94.77p per share, Anglo American fell 8.55 per cent to 450.60p per share and BHP Billiton was 4.27 per cent lower at 884.50p per share.
Earlier, copper prices slid to a two-and-a-half month low after the dollar rose effectively making it more expensive, and Chinese loan data which was significantly weaker than expected. China is the largest metals consumer, accounting for nearly half of global copper demand.
"The underlying commodity prices that are driving down commodity-linked stocks (are) … driven by concerns over China (and) a stronger dollar,” Fawad Razaqzada, technical analyst at City Index, said.
Tumbling commodity prices have weighed on the FTSE 350 mining index, which is down 39 per cent since the start of this year.