 | Beurlen, H., Thomas, R., Melgarejo, J. C., Da Silva, J. M. R., Rhede, D., Soares, D. R., Da Silva, M. R. R. (2013) Chrysoberyl-sillimanite association from the Roncadeira pegmatite, Borborema Province, Brazil: implications for gemstone exploration. Journal of GEOsciences, 58 (2) 79-90 | Journal (article/letter/editorial) | | Chrysoberyl–sillimanite association from the Roncadeira pegmatite, Borborema Province, Brazil: implications for gemstone...Hélio Ramos s.n., 50740–530, Recife, Pernambuco, Brazil; beurlen@ufpe.br Helmholtz-Centre Potsdam, German...Tecnologia da Paraíba (IFPB), R. Tranquilino Coelho Lemos 671, 58100–000, Campina Grande – Paraíba, Brazil Corresponding...chrysoberyl in the Borborema Pegmatite Province (BPP) in northeastern Brazil is reported from up to 0.5...large boulders in the dumps covering the Roncadeira pegmatite, worked in the 1940’s for Sn- and Ta-ore |  | Beurlen, Hartmut, Da Silva, Marcelo R. R., Thomas, Rainer, Soares, Dwight R., Olivier, Patrick (2008) Nb–Ta–(Ti–Sn) oxide mineral chemistry as tracer of rare-element granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil. Mineralium Deposita, 43 (2) 207-228 doi:10.1007/s00126-007-0152-4 | Journal (article/letter/editorial) | | rareelement granitic pegmatite fractionation in the Borborema Province, Northeastern Brazil Hartmut Beurlen...Borborema Pegmatitic Province (BPP), northeastern Brazil, is historically important for tantalum mining...the production of gem quality, turquoise blue, ‘Paraíba Elbaite.’ With more than 750 registered mineralized...to the beryl–columbite phosphate subtype. Electron microprobe analyses (EMPA) of columbite, tapiolite,...n., Cidade Universitária, 50740-530 Recife, PE, Brazil e-mail: beurlen@terra.com.br M. R. R. Da Silva |
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