Guilherme Gonçalves

Laser Ablation-ICP-MS U/Pb and isotopic tracing techniques have revolutionized the Earth Sciences over the past 20 years. They require a constant supply of well-characterized, isotopically-uniform standard materials. However, only a small number of such standards are available. Such a reference material should be isotopically/chemically homogeneous, with low contents of common lead, non-metamict, and available in large quantiies of coarse-grained, gem-quality crystals. Potentially suitable monazite is available in pegmatites from the Eastern Brazilian Pegmatite Belt (Araçuaí Orogen, Eastern Brazil). Currently, I am interested in the evaluation of such monazites for primary and/or secondary standard materials for LA-ICP-MS technique.

PUBLICATIONS:

Frost R.L., López A., Gonçalves G.O., Scholz R. & Xi Y. A vibrational spectroscopic study of the arsenate mineral bayldonite (Cu,Zn)₃Pb(AsO₃OH)₂(OH)₂ – A comparison with other basic arsenates. Journal of Molecular Structure (Print), v. 1056-1057, p. 267-272, 2014.

Gonçalves G.O., Suita M.T.F. & Pinheiro M.A.P.. Considerações sobre o potencial metalogenético de EGP em meta-ultramafitos ofiolíticos da Faixa Brasília sul, sul do Cráton São Francisco – MG.. In: 46º Congresso Brasileiro de Geologia & 1º Congresso de Geologia dos Países de Língua Portuguesa, 2012, Santos – SP. Anais do 46 Congresso Brasileiro de Geologia. Santos: Sociedade Brasileira de Geologia, 2012. v. 1.

GONCALVES G. O.; LANA C.; SCHOLZ RICARDO; BUICK I.; MARINHO M. The origin of the Moacyr monazite standard, elemental and isotopic constraints. In: 8th Hutton Symposium on Granites and Related Rocks, 2015, Florianópolis. Programs and Abstracts, 2015. v. 1.

GONCALVES G. O.; SANTOS A. C. O.; SCHOLZ RICARDO; LANA C.; BUICK I.; MARINHO M. Development of Monazite Standards for U-Pb Geochronology by Laser Ablation. In: 9th South American Symposium on Isotope Geology – 9th SSAGI, 2014, São Paulo. Program and Abstracts, 2014. v. 1.