Pinpointing the source of a lunar meteorite: Implications for the evolution of the moon

Edwin Gnos, Beda A. Hofmann, Ali Al-Kathiri, Silvio Lorenzetti, Otto Eugster, Martin J. Whitehouse, Igor M. Villa, A. J.Timothy Jull, Jost Eikenberg, Bernhard Spettel, Urs Krähenbühl, Ian A. Franchi, Richard C. Greenwood

Research output: Contribution to journalArticle

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Abstract

The lunar meteorite Sayh at Uhaymir 169 consists of an impact melt breccia extremely enriched with potassium, rare earth elements, and phosphorus [thorium, 32.7 parts per million (ppm); uranium, 8.6 ppm; potassium oxide, 0.54 weight percent], and adherent regolith. The isotope systematics of the meteorite record four lunar impact events at 3909 ± 13 million years ago (Ma), ∼2800 Ma, ∼200 Ma, and <0.34 Ma, and collision with Earth sometime after 9.7 ± 1.3 thousand years ago. With these data, we can link the impact-melt breccia to Imbrium and pinpoint the source region of the meteorite to the Lalande impact crater.

Original languageEnglish (US)
Pages (from-to)657-659
Number of pages3
JournalScience
Volume305
Issue number5684
DOIs
StatePublished - Jul 30 2004

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Gnos, E., Hofmann, B. A., Al-Kathiri, A., Lorenzetti, S., Eugster, O., Whitehouse, M. J., Villa, I. M., Jull, A. J. T., Eikenberg, J., Spettel, B., Krähenbühl, U., Franchi, I. A., & Greenwood, R. C. (2004). Pinpointing the source of a lunar meteorite: Implications for the evolution of the moon. Science, 305(5684), 657-659. https://doi.org/10.1126/science.1099397