Preliminary Results in Gold Provenance Characterization using LA ICP MS (Resultados preliminares na caracterização da proveniência de ouro usando LA ICP MS)

Armando Dias Tavares Jr., Mauro César Geraldes, Márcio C. Inácio, William Murussi Canto Jr., Luiz Pinheiro Cordovil da Silva

Resumo


We present some preliminary results of Pb isotopes characterization of gold samples.The first  aim of this work is to apply an archeometry technique, that is, geographical origin characterization of ancient artifacts in order  to characterize gold provenance. Using Pb isotopes in gold samples in which that metal is found as a trace is possible using ICP MS techniques. In this work was also used laser ablation to extract material from the sample.Samples have been obtained from three brazilian geographically distinct gold-digging sites. The samples were processed only by fusion into a furnace at 1,200 ºC. Laser ablation and analysis by aa ICP MS was performed. We have measured Pb isotopes at ppb levels and have derived a few relations among them and made some graphics. In those graphics one can see the measured relations are characteristic fingerprints of each single site. Therefore, the pure gold provenance can be quite well characterized using mass spectrometry instrumentation and its techniques. Further work is in progress to determine the behaviour of mixed gold samples from different provenances. Besides that, measurements with different  sample preparation will be made, in order to compare results with laser ablation extraction.


Palavras-chave


Geossistemas

Texto completo:

PDF (English)

Referências


Bendall, C.; Wigg-Wolf, D.; Lahaye Y.; Von Kaenel, H. M. and Brey, G. P., 2009, Archeometry, 51, 4; Detecting Changes of Celtic Gold Sources Through the Application of Trace Element and Pb Isotope Laser Ablation Analysis of Celtic Gold Coins

Cattin, F.; Guenette-Beck, B.; Besse, M.; Serneels, V., 2009, Archaeol Anthropol Sci, 1: 137-148; Lead Isotopes and Archaeometallurgy

Fernandes, C.J.; Geraldes, M.C.; Tassinari, C.C.G.; Kuyumjian, R.M. 2003. Idades 40Ar/39Ar para a Faixa Móvel Aguapeí, sudoeste do estado de Mato Grosso, fronteira Brasil-Bolívia. In: Proceedings of 9th Simpósio de Geologia do Centro Oeste SBG/ Núcleo Centro Oeste. Cuiabá

Isotopic Evidence for the Late Brasiliano (500–550 Ma)

Ore-Forming Mineralization of the Araés Gold Deposit, Brazil

Isotopic Evidence for the Late Brasiliano (500–550 Ma)

Ore-Forming Mineralization of the Araés Gold Deposit, Brazil

Isotopic Evidence for the Late Brasiliano (500–550 Ma)

Ore-Forming Mineralization of the Araés Gold Deposit, Brazi

Geraldes, M. C., Tassinari, C.C. G.; Babinski, M.; Martinelli, C. D.; Iver, S. S.; Barboza, E. S.; Pinho, F. E. C., Onoe, A. T., 2008, International Geology Review, Vol. 50, p. 177–190. Isotopic Evidence for the Late Brasiliano (550-550Ma) Ore-Forming Mineralization of Araés Gold Deposit, Brazil.

Geraldes, M. C.; Teixeira, W.; Heilbron, M. 2004, Episodes, 27(3):185-189. Lithospheric versus asthenospheric source of the SW Amazonian craton A-types granites: the role of the Paleo and Mesoproterozoic accretionary belts for their coeval continental suítes.

Geraldes, M.C.; Figueiredo, B.R.; Tassinari, C.C.G.; Ebert, H.D. 1997, International Geology Review, 39:438-448. Middle Proterozoic vein-hosted gold deposits in the Pontes e Lacerda region, southwestern Amazonian Craton, Brasil .

Geraldes, M.C.; Van Schmus, W.R.; Condie, K.C.; Bell, S.; Teixeira, W.; Babinski, M. 2001, Precambrian Research. 111: 91-128. Proterozoic geologic evolution of the SW part of the Amazonian Craton in Mato Grosso state, Brazil.

Guillaume, L.; Lesage, J.; Richards, P.; Muehlenbachs, K. and Spell, T. L.; 2013, Geochronology, Geochemistry, and Fluid Characterization of the Late Miocene Buriticá Gold Deposit, Antioquia Department, Colombia Economic Geology, v. 108, pp. 1067-1097

Irving, E.M., 1975, U.S. Geological Survey, Professional Paper 846, p. 1–47. Structural evolution of the northernmost Andes, Colombia.

Junk, S. A.; Pernicka, E., Archeometry 45, 2 (2003) 313-331, An Assessement of Osmium isotope Ratios as a New Tool to Determine the Provenance of Gold with Platinum-Group Metal Inclusions.

Klein, S.; Hauptmann, A.; Jansen, M.; Kirchner, D.; Lehmann, R. and Zettler, 2012. Platinum Group Element Inclusions in Early Bronze Age Gold artefacts from the Royal Tombs of Ur, 2600/2500 BC. In R. European Mineralogical Conference Vol. 1, Frankfurt, p. 575-76.

Lesage, G., 2011. Geochronology, petrography, geochemical constraints, and fluid characterization of the Buriticá gold deposit, Antioquia department, Colombia. Thesis (M.Sc.) Edmonton/Canada, University of Alberta

Martinelli, C. D. 1999. Petrografia, estrutural e fluidos da mineralização aurífera dos Araés - Nova Xavantina – MT. Thesis (D.Sc.), S. Paulo/SP, Brazil, UNESP.

Pinarelli, L., 2004, Lead Isotope Characterization of Copper Ingots from Sardinia (Italy): Inferences on their Origins. In Bulletin of the Geological Society of Greece vol. XXXVI, Proceedings of the International Congress, Thessaloniki.

Pinho, F. E. C. 1990. Estudo das rochas encaixantes dos veios mineralizados a ouro do Grupo Cuiabá na região denominada “Garimpo do Araés”, Nova Xavantina – Estado de Mato Grosso. Thesis (M.Sc.). Porto Alegre/RS, Brazil, Instituto de Geociências, UFRGS

Ponting, M.; Evans, J. A. and Pashley, V.; 2003, Archeometry, 45, 591-597, Fingerprinting of Roman Mints using Laser-Ablation MC-ICP-MS Lead Isotope Analysis

Sillitoe, R.H., Jaramillo, L., Damon, P.E., hafiqullah, M., and Escovar, R., 1982, Economic Geology, v. 77, p. 1837–1850. Setting, characteristics, and age of the Andean porphyry copper belt in Colombia.

Stos-Gale, Z. A.; Gale, N. H., 2009, Archaeol Anthropol Sci. 1:195-213; Metal provenancing using isotopes and the Oxford archaelogical lead isotope database (OXALID)

Tassinari, C.G., Bettencourt, J.S., Geraldes, M.C., Macambira, M.J.B., and Lafon, J.M., 2000. The Amazon craton. In: Cordani, U.; Milani, E.J.; Thomaz Filho, A.; Campos, D.A. (Eds). Tectonic evolution of South America. Proccedings of the XXXI International Geological Congress, Rio de Janeiro, Brazil, 41-95.

Wilson, A. and Friedman, H., 2010. Mining Database. Version 1.0. Available; http: oxrep.classics.ox.ac.uk databases mines_database Accessed (May, 16th, 2017)




DOI: https://doi.org/10.26848/rbgf.v11.3.p934-947

Licença Creative Commons
Esta obra está licenciada sob uma licença Creative Commons Atribuição 4.0 Internacional.

      

Revista Brasileira de Geografia Física - ISSN: 1984-2295

Creative Commons License
Esta obra está licenciada com uma Licença Creative Commons Attribution-NonCommercial 4.0 International License