Question

What are the ways in which siderite or is enriched

Answer 1

Their hydrothermal mineralisation tends to form them as small ore lenses, often following steeply dipping bedding planes.This makes them not amenable to opencast working, and increases the cost of working them by mining with horizontal stopes. As the individual ore bodies are small, it may also be necessary to duplicate or relocate the pit head machinery, winding engine and pumping engine, between these bodies as each is worked out. This makes mining the ore an expensive proposition compared to typical ironstone or haematite opencasts.