Deep-sea mine tailings placement (DSTP) is an alternative to land-based mine-waste disposal, whereby mineral ore is converted into slurry and transported via a pipeline to processing plants located at the coast, with the resultant waste being discharged into very deep water offshore. Specific topographical and hydrodynamic conditions must exist if the mine tailings are to sink to the seabed and remain there.

Although not always appropriate, when compared to the capital and operational costs of on-land impoundments, this type of tailings disposal can be very economical. DSTP is therefore gaining favour in the light of catastrophic dam failures and in the face of land-availability, land-use value and land-ownership disputes, which are prevalent in some countries.

Source: Australian Mining ; See full article