No environmental harm from Qld zinc spill A LARGE zinc concentrate spill caused by a train derailment does not pose any threat to the environment, the Queensland government says. The private freight train was headed to a Townsville foundry when it derailed at Mingela, southwest of the north Queensland city, on Sunday morning. The government says 21 wagons derailed, spilling a large amount of the concentrate onto the tracks. Environment Minister Andrew Powell said officers had managed to contain "most most of the material so that there's no risk of environmental harm." But it will still be a couple of days before the clean up is complete, and the line will remain closed for up to two weeks. Transport Minister Scott Emerson said investigators had arrived on site to determine the cause of the incident. This was a significant derailment and spill which needs a full investigation, Mr Emerson said. He said parts of the Mt Isa train line needed upgrading and the work was part of a submission to the federal government's nation building program. Buses are transporting passengers booked on the Inlander train service, which travels between Townsville and Mt Isa twice a week.