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fbtwitterlinkedinvimeoflicker grey 14rssslideshare1
Publisher: Elsevier
Languages: English
Types: Article
Subjects: Volatile elements, Stable isotopes, Zn isotopes, Iron meteorites, sub-05, Core formation.
Zinc isotope compositions (δ66Zn) and concentrations were determined for metal samples of 15 iron meteorites across groups IAB, IIAB, and IIIAB. Also analyzed were troilite and other inclusions from the IAB iron Toluca. Furthermore, the first Zn isotope data are presented for metal–silicate partitioning experiments that were conducted at 1.5 GPa and 1650 K. Three partitioning experiments with run durations of between 10 and 60 min provide consistent Zn metal–silicate partition coefficients of ∼0.7 and indicate that Zn isotope fractionation between molten metal and silicate is either small (at less than about ±0.2‰±0.2‰) or absent. Metals from the different iron meteorite groups display distinct ranges in Zn contents, with concentrations of 0.08–0.24 μg/g for IIABs, 0.8–2.5 μg/g for IIIABs, and 12–40 μg/g for IABs. In contrast, all three groups show a similar range of δ66Zn values (reported relative to ‘JMC Lyon Zn’) from +0.5‰+0.5‰ to +3.0‰+3.0‰, with no clear systematic differences between groups. However, distinct linear trends are defined by samples from each group in plots of δ66Zn vs. 1/Zn, and these correlations are supported by literature data. Based on the high Zn concentration and δ66Zn ≈ 0 determined for a chromite-rich inclusion of Toluca, modeling is employed to demonstrate that the Zn trends are best explained by segregation of chromite from the metal phase. This process can account for the observed Zn–δ66Zn–Cr systematics of iron meteorite metals, if Zn is highly compatible in chromite and Zn partitioning is accompanied by isotope fractionation with Δ66Znchr-met≈−1.5‰≈−1.5‰. Based on these findings, it is likely that the parent bodies of the IAB complex, IIAB and IIIAB iron meteorites featured δ66Zn values of about −1.0 to +0.5‰+0.5‰, similar to the Zn isotope composition inferred for the bulk silicate Earth and results obtained for chondritic meteorites. Together, this implies that most solar system bodies formed with similar bulk Zn isotope compositions despite large differences in Zn contents.
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    • Andreasen, R., Rehkämper, M., Benedix, G.K., Theis, K., Schönbächler, M., Smith, C., 2012. Pb-Tl chronology of IIAB and IIIAB iron meteorites. Mineral. Mag. 76, 1426.
    • Arnold, T., Schönbächler, M., Rehkämper, M., Dong, S., Zhao, F.-J., Kirk, G.J.D., Coles, B.J., Weiss, D.J., 2010. Determination of zinc stable isotope compositions in geological and biological samples by double spike MC-ICPMS. Anal. Bioanal. Chem. 398, 3115-3125.
    • Benedix, G.K., McCoy, T.J., Keil, K., Love, S.G., 2000. A petrographic study of the IAB iron meteorites: constraints on the formation of the IAB-winonaite parent body. Meteorit. Planet. Sci. 35, 1127-1141.
    • Benedix, G.K., Haack, H., McCoy, T.J., 2013. Iron and stony-iron meteorites. In: Davis, A.M. (Ed.), Meteorites, Comets, and Planets. 2nd ed. Elsevier, Amsterdam, pp. 325-345.
    • Buchwald, V.F., 1977. Mineralogy of iron meteorites. Philos. Trans. R. Soc. Lond. A 286, 453-491.
    • Bunch, T.E., Keil, K., Olsen, E., 1970. Mineralogy and petrology of silicate inclusions in iron meteorites. Contrib. Mineral. Petrol. 25, 297-340.
    • Chabot, N.L., Haack, H., 2006. Evolution of asteroidal cores. In: Lauretta, D.S., McSween Jr., H.Y. (Eds.), Meteorites and the Early Solar System II. University of Arizona Press, Tucson, pp. 747-771.
    • Chabot, N.L., Saslow, S.A., McDonough, W.F., Jones, J.H., 2009. An investigation of the behavior of Cu and Cr during iron meteorite crystallization. Meteorit. Planet. Sci. 44, 505-519.
    • Choi, B.G., Ouyang, X.W., Wasson, J.T., 1995. Classification and origin of IAB and IIICD iron meteorites. Geochim. Cosmochim. Acta 59, 593-612.
    • Corgne, A., Keshav, S., Wood, B.J., McDonough, W.F., Fei, Y.W., 2008. Metal-silicate partitioning and constraints on core composition and oxygen fugacity during Earth accretion. Geochim. Cosmochim. Acta 72, 574-589.
    • Criss, R.E., 1999. Principles of Stabe Isotope Distribution. Oxford University Press, Oxford.
    • Ghidan, O.Y., Loss, R.D., 2011. Isotope fractionation and concentration measurements of Zn in meteorites determined by the double spike, IDMS-TIMS techniques. Meteorit. Planet. Sci. 46, 830-842.
    • Göpel, C., Manhès, G., Allègre, C.J., 1985. U-Pb systematics in iron meteorites: uniformity of primordial lead. Geochim. Cosmochim. Acta 49, 1681-1695.
    • Haack, H., McCoy, T.J., 2003. Iron and stony-iron meteorites. In: Davis, A.M. (Ed.), Meteorites, Comets, and Planets. Elsevier, Amsterdam, pp. 325-345.
    • Humayun, M., Clayton, R.N., 1995. Potassium isotope cosmochemistry: genetic implications of volatile element depletion. Geochim. Cosmochim. Acta 59, 2131-2148.
    • Jochum, K.P., Nohl, U., Herwig, K., Lammel, E., Stoll, B., Hofmann, A.W., 2005. GeoReM: a new geochemical database for reference materials and isotopic standards. Geostand. Geoanal. Res. 29, 333-338.
    • Kehm, K., Hauri, E.H., Alexander, C.M.O.D., Carlsen, R.W., 2003. High precision iron isotope measurements of meteoritic material by cold plasma ICP-MS. Geochim. Cosmochim. Acta 67, 2879-2891.
    • Kohn, S.C., Schofield, P.F., 1994. The importance of melt composition in controlling trace-element behaviour: an experimental study of Mn and Zn partitioning between forsterite and silicate melts. Chem. Geol. 117, 73-87.
    • Kracher, A., 1983. Notes on the evolution of the IIIAB/pallasite parent body. Lunar Planet. Sci. Conf. XIV, 405-406.
    • Kracher, A., 1985. The evolution of partially differentiated planetesimals - evidence from iron meteorite groups IAB and IIICD. J. Geophys. Res. 90 (Supplement), C689-C698.
    • Kracher, A., Kurat, G., Buchwald, V.F., 1977. Cape-York: the extraordinary mineralogy of an ordinary iron meteorite and its implication for the genesis of IIIAB irons. Geochem. J. 11, 207-217.
    • Kracher, A., Gramstad, S.D., Kurat, G., 1998. Soroti and the origin of sulfide-rich meteorites. Meteorit. Planet. Sci. 33 (Supplement), A88-A89.
    • Lagos, M., Ballhaus, C., Münker, C., Wohlgemuth-Ueberwasser, C., Berndt, J., Kuzmin, D., 2008. The Earth's missing lead may not be in the core. Nature 456, 89-92.
    • Larner, F., Rehkämper, M., 2012. Evaluation of stable isotope tracing for ZnO nanomaterials - new constraints from high precision isotope analyses and modeling. Environ. Sci. Technol. 46, 4149-4158.
    • Luck, J.-M., Ben Othman, D., Albarède, F., 2005. Zn and Cu isotopic variations in chondrites and iron meteorites: early solar nebula reservoirs and parent-body processes. Geochim. Cosmochim. Acta 69, 5351-5363.
    • Mann, U., Frost, D.J., Rubie, D.C., 2009. Evidence for high-pressure core-mantle differentiation from the metal-silicate partitioning of lithophile and weaklysiderophile elements. Geochim. Cosmochim. Acta 73, 7360-7386.
    • Maréchal, C.N., Télouk, P., Albarède, F., 1999. Precise analysis of copper and zinc isotopic compositions by plasma-source mass spectrometry. Chem. Geol. 156, 251-273.
    • McCoy, T.J., Mittlefehldt, D.W., Wilson, L., 2006. Asteroid differentiation. In: Lauretta, D.S., McSween Jr., H.Y. (Eds.), Meteorites and the Early Solar System II. University of Arizona Press, Tucson, pp. 733-745.
    • Mittlefehldt, D.W., McCoy, T.J., Goodrich, C.A., Kracher, A., 1998. Non-chondritic meteorites from asteroidal bodies. In: Papike, J.J. (Ed.), Planetary Materials. Mineralogical Society of America, Washington, DC, pp. 4-01-4-195.
    • Moynier, F., Rushmer, T., Albarède, F., 2005. Zn isotopic mass fractionation during high temperature segregation of metal from silicate. In: 68th Annual Meteoritical Society Meeting, p. 5223.
    • Moynier, F., Blichert-Toft, J., Télouk, P., Luck, J.-M., Albarède, F., 2007. Comparative stable isotope geochemistry of Ni, Cu, Zn, and Fe in chondrites and iron meteorites. Geochim. Cosmochim. Acta 71, 4365-4379.
    • Moynier, F., Paniello, R.C., Gounelle, M., Albarède, F., Beck, P., Podosek, F., Zanda, B., 2011. Nature of volatile depletion and genetic relationships in enstatite chondrites and aubrites inferred from Zn isotopes. Geochim. Cosmochim. Acta 75, 297-307.
    • Nielsen, S.G., Rehkämper, M., Halliday, A.N., 2006. Thallium isotopic variations in iron meteorites and evidence for live lead-205 in the early solar system. Geochim. Cosmochim. Acta 70, 2643-2657.
    • Presnall, D.C., Dixon, S.A., Dixon, J.R., Odonnell, T.H., Brenner, N.L., Schrock, R.L., Dycus, D.W., 1978. Liquidus phase relations on join diopside-forsterite-anorthite from 1 atm to 20 kbar - their bearing on generation and crystallization of basaltic magma. Contrib. Mineral. Petrol. 66, 203-220.
    • Richter, F.M., Dauphas, N., Teng, F.-Z., 2009. Non-traditional fractionation of nontraditional isotopes: evaporation, chemical diffusion and Soret diffusion. Chem. Geol. 258, 92-103.
    • Schulz, T., Münker, C., Palme, H., Mezger, K., 2009. Hf-W chronometry of the IAB iron meteorite parent body. Earth Planet. Sci. Lett. 280, 185-193.
    • Scott, E.R.D., 1972. Chemical fractionation in iron meteorites and its interpretation. Geochim. Cosmochim. Acta 36, 1205-1236.
    • Scott, E.R.D., 1977. Geochemical relationships between some pallasites and iron meteorites. Mineral. Mag. 41, 265-272.
    • Theis, K.J., Schönbächler, M., Benedix, G.K., Rehkämper, M., Andreasen, R., Davies, C., 2013. Palladium-silver chronology of IAB iron meteorites. Earth Planet. Sci. Lett. 361, 402-411.
    • Ulff-Møller, F., 1998. Effects of liquid immiscibility on trace element fractionation in magmatic iron meteorites: a case study of group IIIAB. Meteorit. Planet. Sci. 33, 207-220.
    • Wasson, J.T., 1999. Trapped melt in IIIAB irons; solid/liquid elemental partitioning during the fractionation of the IIIAB magma. Geochim. Cosmochim. Acta 63, 2875-2889.
    • Wasson, J.T., Kallemeyn, G.W., 2002. The IAB iron-meteorite complex: a group, five subgroups, numerous grouplets, closely related, mainly formed by crystal segregation in rapidly cooling melts. Geochim. Cosmochim. Acta 66, 2445-2473.
    • Wasson, J.T., Lange, D.E., Francis, C.A., Ulff-Moller, F., 1999. Massive chromite in the Brenham pallasite and the fractionation of Cr during the crystallization of asteroidal cores. Geochim. Cosmochim. Acta 63, 1219-1232.
    • Wasson, J.T., Huber, H., Malvin, D.J., 2007. Formation of IIAB iron meteorites. Geochim. Cosmochim. Acta 71, 760-781.
    • Wombacher, F., Rehkämper, M., Mezger, K., Bischoff, A., Münker, C., 2008. Cadmium stable isotope cosmochemistry. Geochim. Cosmochim. Acta 72, 646-667.
    • Zhu, X.K., Guo, Y., O'Nions, R.K., Young, E.D., Ash, R.D., 2001. Isotopic homogeneity of iron in the early solar system. Nature 412, 311-313.
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