Evidence for Zn isotopic fractionation at Merapi volcano

Investigation of thallium fluxes from subaerial volcanism—Implications for the present and past mass balance of thallium in the oceans

“…It is noteworthy that these systematics differ from those observed for Zn isotopes in volcanic gases from Mt. Merapi (Toutain et al, 2008). In particular, it was observed that the Mt.…”

“…Etna has shown that Tl degasses about 10 to 20 times more efficiently from magmas than Pb (Guthier and Le Cloarec, 1998;Hinkley et al, 1994) and this result is in excellent agreement with the data of Fig 4a. This suggests that the Tl/Pb variability of volcanic gases is at least in part and potentially primarily inherited from source magmas that exhibit variable Tl/Pb ratios. Additional variability in Tl/Pb can be generated by (i) differences in the Tl-Pb degassing efficiencies for different volcanic centres and eruptions Le Cloarec et al, 1992;Nho et al, 1996) and (ii) the chemical evolution of the gases during cooling, as Tl and Pb condense at different temperatures and concentrate in distinct mineral phases (Toutain et al, 1990(Toutain et al, , 2008Taran et al, 1995;Churakov et al, 2000;Toutain et al, 2008).…”

Isotope Fractionation Processes of Selected Elements

“…Fumarolic gases and condensates from the Merapi volcano have a relatively large range in Zn isotope compositions. Gaseous Zn samples are enriched in lighter Zn isotopes whereas condensates are enriched in the heavier isotopes (Toutain et al 2008). …”

Equilibrium zinc isotope fractionation in Zn-bearing minerals from first-principles calculations

“…In the latter, the lowest δ 66 Zn value has been so far measured in lunar samples with δ 66 Zn = −11.4 (Kato et al, 2015) while the largest value has been found in primitive meteorites by Moynier et al (2011a) with δ 66 Zn = 7.35 . In comparison, δ 66 Zn of terrestrial geological materials spread into a small range comprised between −0.80 and 2.5 (Pichat et al, 2003;Wilkinson et al, 2005; A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT Toutain et al, 2008;Chen et al, 2009;Moynier et al, 2009a;Pons et al, 2011;Gagnevin et al, 2012;Pašava et al, 2014;Little et al, 2014;Zhao et al, 2014) and the average δ 66 Zn of igneous rocks is 0.28 ± 0.05 (Maréchal, 1998;Cloquet et al, 2006;Herzog et al, 2009;Paniello et al, 2012;Chen et al, 2013). Zn isotope composition have been widely used to trace environmental processes, to study spatial extension of metal pollution and to identify some attenuation mechanisms.…”