U-Pb and Hf-W dating of young zircon in mesosiderite Asuka 882023

M. Koike, N. Sugiura, N. Takahata, A. Ishida, Y. Sano

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Mesosiderites are unique stony-iron meteorites, composed of eucrite-like silicates and Fe-Ni metals. Their formation, including silicate-metal mixing and metamorphisms, provides important insights into early planetary processes in the inner solar system. This report describes the first in situ U-Pb and Hf-W dating of zircon in a mesosiderite Asuka 882023. The U-Pb (4502 ± 75 Ma) and Hf-W (4532.8 + 5.7/−10.5 Ma) ages may represent timing of the zircon formation, which is considerably younger than crustal differentiation of the parent body. This evidence, combined with earlier studies of chronology, implies that mesosiderites were reheated at 4530–4520 Ma, clearly after the silicate-metal mixing.

Original languageEnglish
Pages (from-to)1251-1259
Number of pages9
JournalGeophysical Research Letters
Volume44
Issue number3
DOIs
Publication statusPublished - 2017 Feb 16
Externally publishedYes

Keywords

  • Hf-W dating
  • NanoSIMS
  • U-Pb dating
  • mesosiderite
  • zircon

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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