Sayh al Uhaymir 169: Difference between revisions

'''Sayh al Uhaymir 169''' (SaU 169) is a 206 gramsgram [[lunar meteorite]] found in the Sayh al Uhaymir region of the [[Oman|Sultanate of Oman]] in January 2002.

This stone is an [[impact event|impact-melt]] [[breccia]] with exceedingly high concentrations of [[thorium]] and other ''[[incompatible'' elementselement]]s; [[phosphorus]], [[rare -earth element]]s, and the three most important naturally occurring [[radioactive]] elements, [[potassium]], thorium, and [[uranium]], have been segregated in the liquid phase when the lunar [[mineral]]s [[Crystallisation|crystallized]]. The impact that eventually sent this stone to the Earth is dated at 3.9 billion years and could be the [[Mare Imbrium|Imbrium impact]]. It collided with the Earth less than 9,700 years ago.

It is complete, a light gray-greenish rounded stone, dimensions {{convert|70|×|43|x|40|mm|abbr=on}} and mass {{convert|206|g}}, found on January 16, 2002, in the central desert of Oman at 20° 34.391' N and 57° 19.400' E.

"Crystallization of the impact melt occurred at 3909 ± 13 Ma, followed by exhumation by a second impact at 2800 Ma, which raised the sample to a regolith position at unconstrained depth. A third impact at 200 Ma moved the material closer to the lunar surface, where it mixed with solar-wind–containing regolith. It was launched into space by a fourth impact at <0.34 Ma".<ref>Gnos, Edwin, 'et al.', 2004, [https://www.science.org/doi/abs/10.1126/science.1099397 Pinpointing the Source of a Lunar Meteorite: Implications for the Evolution of the Moon], [[Science (journal)|Science]] 30 July 2004: Vol. 305 no. 5684 pp. 657-659 DOI:657–659. {{doi|10.1126/science.1099397 [http://www}}.sciencemag.org/content/305/5684/657.abstract abstract]</ref>

*https://archive.today/20030604170334/http://epsc.wustl.edu/admin/resources/meteorites/sau169.html