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IUPAC-IUGS common definition and convention on the use of the year as a derived unit of time (IUPAC Recommendations 2011)

Holden, Norman E. ; Bonardi, Mauro L. ; De Bièvre, Paul ; Renne, Paul R. ; Villa, Igor M.

In: Pure and Applied Chemistry, 2011, vol. 83, no. 5, p. 1159-1162

Dating Polygenetic Metamorphic Assemblages along a Transect across the Western Alps

Villa, Igor M. ; Bucher, Stefan ; Bousquet, Romain ; Kleinhanns, Ilka C. ; Schmid, Stefan M.

In: Journal of Petrology, 2014, vol. 55, no. 4, p. 803-830

Provenance of early bronze age metal artefacts in western Switzerland using elemental and lead isotopic compositions and their possible relation with copper minerals of the nearby Valais

Cattin, Florence ; Guénette-Beck, Barbara ; Curdy, Philippe ; Meisser, Nicolas ; Ansermet, Stefan ; Hofmann, Beda ; Kündig, Rainer ; Hubert, Vera ; Wörle, Marie ; Hametner, Kathrin ; Günther, Detlef ; Wichser, Adrian ; Ulrich, Andrea ; Villa, Igor M. ; Besse, Marie

In: Journal of Archaeological Science, 2011, p. -

Ten Early Bronze Age (BzA1, 2200-2000 BC) copper artefacts from the central Valais region from Switzerland were studied for their elemental composition and lead isotope ratios. In order to answer the archaeological question of a local copper supply, a database for copper minerals across the Valais (Switzerland) has been established. This database contains 69 data on lead isotope ratios as well as...

Molybdenum isotopic composition of modern and Carboniferous carbonates

Voegelin, Andrea R. ; Nägler, Thomas F. ; Samankassou, Elias ; Villa, Igor M.

In: Chemical Geology, 2009, vol. 265, no. 3-4, p. 488-498

We investigate the redox-sensitive isotope system of molybdenum (Mo) in marine carbonates to evaluate their potential as archive of the Mo isotopic composition of coeval seawater. We present Mo isotope data (δ98/95Mo) of modern skeletal and non-skeletal carbonates as well as a variety of precipitates from the mid and late Carboniferous. The external reproducibility is...