 | | Book | | PO Box 315. Harpenden. Hertfordshire AL5 2ZD. England Telephone: +44 (0)1582 762413 Fax: +44 (0)870 055...production of e0pper. the mining areas of Cornwall and Devon became important producers of b th tin and copp...1\llaga::i11e, on minerals from localities in Cornwall. Devon. Cumbria and Yorkshire. He was renowned for his...Meldonaplitequany.nr Okehampton, Devon (leucophanite)' Meldonaplitequarry,nrOkehampton, Devon PottsGillmine...St Kew,Cornwall; Shallowfield Bridge,SouthMolton,Devon Tynebottom mine,Alston.CUm~ria mercury Chatsworth |  | | Journal (article/letter/editorial) | | field carry columbite-(Fe), columbite-(Mn) and tantalite-(Mn) with low Ti and Mg contents. The structural...pegmatite field. Limited concurrent fractionation of Mn from Fe and Ta from Nb observed in the Brunswick...(stability field of topaz). However, the extensive Fe–Mn fractionation preceding moderate to strong enrichment...pegmatites, minerals of the columbite group, (Fe,Mn)(Nb,Ta) 2O6, have long been recognized as economic...granitic pegmatites, maine Fig. 1. Map of the New England region showing the location of the Oxford and Brunswick |
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