2002/01/01 by Edwin Gnos, Beda A. Hofmann, A. Al‐Kathiri +11 · 3 citations
Arts and Humanities · Environmental Science · Physics and Astronomy · #Astro and Planetary Science #Historical and Religious Studies of Rome #Isotope Analysis in Ecology #Planetary Science and Exploration #Renaissance Literature and Culture #Renaissance and Early Modern Studies
paper · doi:10.1126/science.1099397
openalex publication_date 2002/01/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/04/28
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), approximately 2800 Ma, approximately 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.