Mn-Cr Isotope Systematics and Excess of 54-Cr in Metachondrite Northwest Africa 3133

Details Mn-Cr Isotope Systematics and Excess of 54-Cr in Metachondrite Northwest Africa 3133 Mn-Cr Isotope Systematics and Excess of 54-Cr in Metachondrite Northwest Africa 3133

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011lpi....42.1527s&link_type=abstract

42nd Lunar and Planetary Science Conference, held March 7–11, 2011 at The Woodlands, Texas. LPI Contribution No. 1608, p.1527

Physics

2

Scientific paper

We obtained a 53Mn/55Mn ratio of (1.83 ± 0.23) × 10-6
at the time of isotope closure. This translates into an absolute age of
4561.5 ± 0.4 Ma. The excess of 54Cr indicates that the precursor
of this meteorite was a carbonaceous chondrite material.

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