Orefield

The balance is home-produced and is railborne from inland orefields. The home orefields serving South Wales are situated at Banbury and at Irthlingborough, on the ex-L.N.W.R. Northampton-Peterborough branch.

The Midlands Basin orefield in Ireland contains several large zinc-lead(-barium) ore deposits formed from moderate temperature fluids generated by deep crustal circulation of seawater-derived brines during continental rifting ( 15, 16 ).