Pinpointing the Source of a Lunar Meteorite: Implications for the Evolution of the Moon

The lunar meteorite Sayh al 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 met...

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Veröffentlicht in:	Science (American Association for the Advancement of Science) 2004-07, Vol.305 (5684), p.657-659
Hauptverfasser:	Gnos, Edwin, Hofmann, Beda A., Al-Kathiri, Ali, Lorenzetti, Silvio, Eugster, Otto, Whitehouse, Martin J., Villa, Igor M., A. J. Timothy Jull, Eikenberg, Jost, Spettel, Bernhard, Krähenbühl, Urs, Franchi, Ian A., Greenwood, Richard C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomical research Astronomy Breccia Chemical elements Chemical properties Crystallization Earth, ocean, space Elements Evolution Evolution, Planetary Exact sciences and technology Features, landmarks, mineralogy, petrology, and atmosphere Feldspars Impact craters Impact melts Isotopes KREEP Lead Lunar geology Metals, Rare Earth - analysis Meteorites Meteoroids Meteors & meteorites Moon Olivine Organic Chemistry Phosphorus - analysis Potassium Potassium - analysis Regolith Rocks Solar system Thorium - analysis Uranium - analysis
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Zusammenfassung:	The lunar meteorite Sayh al 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
ISSN:	0036-8075 1095-9203
DOI:	10.1126/science.1099397