Bouch J.E.; Naden J.; McKervey J.A.; Benham A.J.; Shepherd T.J.; Young B.; Sloane H.J.
(2006)
The North Pennine Orefield Alston Block has produced approximately 4 Mt Pb, 0.3 Mt Zn, 2.1 Mt fluorite, 1.5 Mt barite, 1 Mt witherite, plus a substantial amount of iron ore and copper ore from predominantly vein-hosted ...