Abstract
Experimental and analytical procedures devised for measurement of rare earth element (REE) abundances using a secondary ion mass spectrometer (ion microprobe) are described. This approach is more versatile than the conventional techniques such as neutron activation analysis and isotope dilution mass spectrometry by virtue of its high spatial resolution that allows determination of REE abundances in small domains (10-20 micron) within individual mineral phases. The ion microprobe measurements are performed at a low mass-resolving power adopting the energy-filtering technique (Zinner and Crozaz 1986) for removal and suppression of unresolved complex molecular interferences in the REE masses of interest. Synthetic standards are used for determining various instrument specific parameters needed in the data deconvolution procedure adopted for obtaining REE abundances. Results obtained from analysis of standards show that our ion microprobe may be used for determining REE abundances down to ppm range with uncertainties of ∼ 10 to 15%. Abundances of rare earth and several other refractory trace elements in a set of early solar system objects isolated from two primitive carbonaceous chondrites were determined using the procedures devised by us. The results suggest that some of these objects could be high temperature nebular condensates, while others are products of melting and recrystallization of precursor nebular solids in a high temperature environment.
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References
Allegre C J, Prinzhofer A and Pierre A 1989 LIDIA: large isotope dilution ion-probe analyses;Earth Planet. Sci. Lett. 92 179–188
Boynton W V 1975 Fractionation in the solar nebula: Condensation of yttrium and the rare earth elements;Geochim. Cosmochim. Acta 39 569–584
Boynton W V 1984 Cosmochemistry of the rare earth elements: Meteorite studies. In:Rare Earth Element Geochemistry (ed) P Henderson (Elsevier) pp 63–108
Boynton W V 1989 Cosmochemistry of the rare earth elements: Condensation and evaporation processes;Geochemistry and Mineralogy of Rare Earth Elements. (eds) B R Lipin, & G A Mckay, Publication of Mineralogical Society of America, pp 1–24
Boynton W V, Frazier R M and Macdougall J D 1980 Identification of an ultra-refractory component in the Murchison meteorite (abstract);Lunar Planet. Sci. XI 103–105
Davis A M and Grossman L 1979 Condensation and fractionation of rare earths in the solar nebula;Geochim. Cosmochim. Acta 43 1611–1632
Drake M J and Weill D F 1972 New rare earth element standards for electron microprobe analysis;Chem. Geol. 10 179–181
Ekambaram V, Kawabe I, Tanaka T, Davis A M and Grossman L 1984 Chemical composition of refractory inclusions in the Murchison C2 chondrite;Geochim. Cosmochim. Acta 48 2089–2105
Fahey A J, Goswami J N, McKeegan K D and Zinner E K 198726Al,244Pu,50Ti, REE, and trace element abundances in hibonite grains from CM and CV meteorites.Geochim. Cosmochim. Acta 51 329–350
Fahey A J 1998 Details of the measurement of rare earth and other trace element abundances by secondary ion mass spectrometry;Int. J. Mass Spectrom. Ion Processes 176 63–76
Henderson P 1984 General geochemical properties and abundances of the rare earth elements. In:Rare Earth Element Geochemistry (ed) P Henderson (Elsevier) pp 1–29
Hinton R W, Davis A M, Scatena-Wachel D E, Grossman L and Draus R J 1988 A chemical and isotopic study of hibonite-rich refractory inclusions in primitive meteorites;Geochim. Cosmochim. Acta 52 2573–2598
Ireland T R 1990 Presolar isotopic and chemical signatures in hibonite-bearing refractory inclusions from the Murchison carbonaceous chondrite;Geochim. Cosmochim. Acta 54 3219–3237
Ireland T R, Fahey A J and Zinner E K 1988 Traceelement abundances in hibonites from the Murchison carbonaceous chondrite: constraints on high-temperature processes in the solar nebula;Geochim. Cosmochim. Acta 52 2841–2854
MacPherson G J, Wark D A and Armstrong J T 1988 Primitive material surviving in chondrites: Refractory inclusions. In:Meteorites and the early solar system (eds) J F Kerridge and M S Matthews (Univ. Arizona Press) pp 746–807
Martin P M and Mason B 1974 Major and trace elements in the Allende meteorite;Nature 249 333–334
Mason B and Martin P M 1977 Minor trace element distribution in melilite and pyroxene from the Allende meteorite;Earth Planet. Sci. Lett. 22 141–144
Press W H, Teukolsky S A, Vetterling W T and Flannery B P 1993 In:Numerical recipes in Fortran: The art of scientific computing (Cambridge University Press) pp 963
Sahijpal S, Goswami J N and Davis A M 2000 K, Mg, Ca and Ti isotopic compositions and refractory trace element compositions of hibonites from CV and CM meteorites;Geochim. Cosmochim. Acta 64 1989–2005
Yoneda S and Grossman L 1995 Condensation of CaO-MgO-Al O-Si O liquids from cosmic gases.Geochim. Cosmochim. Acta 59 3413–3444
Zinner E and Crozaz G 1986 A method for the quantitative measurement of rare earth elements in the ion microprobe;Int. J. Mass Spectrom. Ion Processes 69 17–38
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Sahijpal, S., Marhas, K.K. & Goswami, J.N. Determination of rare earth and refractory trace element abundances in early solar system objects by ion microprobe. J Earth Syst Sci 112, 485–498 (2003). https://doi.org/10.1007/BF02709775
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DOI: https://doi.org/10.1007/BF02709775