Trace Element (REE, Y, Sr, Mn) Abundances in Carbonates in CM Chondrites

Details Trace Element (REE, Y, Sr, Mn) Abundances in Carbonates in CM Chondrites Trace Element (REE, Y, Sr, Mn) Abundances in Carbonates in CM Chondrites

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..163b&link_type=abstract

Lunar and Planetary Science, volume 27, page 163

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Alteration: Aqueous, Carbonates, Chondrites: Cm, Rare Earth Elements, Trace Elements

Scientific paper

Carbonates in CM chondrites may be a possible sink for REE elements which are released from chondrule mesostases during aqueous alteration. In order to examine whether the REEs are mobile and are taken up in carbonates we have measured the abundances of Mn, Sr, Y and REE in calcites in the three CM chondrites, Murchison, Mighei and ALH 84034 by SIMS. These three meteorites cover the range of degrees of alteration observed in the CM chondrites from the least altered (Murchison) to highly altered (ALH 84034). Our analyses for Mn and Sr are consistent with the data reported by from carbonates in other CM chondrites. Our results for the REE elements show that these elements are present in extremely low abundances (3 x CI to less than 0.1 x CI) in calcite in all three meteorites and in most cases are below detection limits for our instrument (0.02 to 0.41 x CI for LREE and 0.2 x CI for most of the HREE).

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