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Line 1: {{Short description\|Lunar meteorite}} '''Sayh al Uhaymir 169''' (SaU 169) is a 206g [[lunar meteorite]] found in the Sayh al Uhaymir region of the [[Oman\|Sultanate of Oman]] in January 2002.▼ {{Infobox meteorite \|Name = Sayh al Uhaymir 169 \|Alternative names = SaU 169 \|Image = Sayh al Uhaymir 169.jpg \|Image_caption = Complete stone of SaU169 showing the fusion crust and also a large clast \|Type = [[Achondrite]] \|Class = [[Lunar meteorite]] \|Group = [[Impact breccia]] \|Structural_classification = \|Composition = 45.15% SiO{{sub\|2}}, 15.88% Al{{sub\|2}}O{{sub\|3}}, 11.09% MgO, 10.67% FeO, 10.16% CaO, 2.21% TiO{{sub\|2}}, 1.14% P{{sub\|2}}O{{sub\|5}}, 0.98% Na{{sub\|2}}O, 0.54% K{{sub\|2}}O, 0.33% S, 0.14% MnO \|Shock = \|Weathering = \|Country = [[Oman]] \|Region = Sayh al Uhaymir \|Lat_Long = {{coord\|20.5733\|57.3234\|display=inline,title}} \|Observed_fall = No \|Fall_date = < 9700 years ago \|Found_date = 16 January 2002 \|TKW = {{convert\|206.45\|g\|oz}} \|Image2 = Sayh al Uhaymir 169, as found in desert.jpg \|Image2_caption = Sayh al Uhaymir 169 as found in the Oman desert }} ▲'''Sayh al Uhaymir 169''' (SaU 169) is a ~~206g~~206 gram [[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'' ~~elements~~element]]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 [[~~crytallisation~~Crystallisation\|crystallized]]. The impact that eventually sent this stone to the Earth is dated at 3.9 ~~million~~billion years and could be the [[Mare Imbrium\|Imbrium impact]]. It collided with the Earth ~~9.7~~less ±than ~~1.3~~9,700 years ~~kya~~ago. It is complete, a light gray-greenish rounded stone, dimensions ~~70x43x40mm~~{{convert\|70\|×\|43\|x\|40\|mm\|abbr=on}} and mass {{convert\|206~~ grams~~\|g}}, found on January 16, 2002, in the central desert of Oman at 20° 34.391' N and 57° 19.400' E. According to geologist [[Edwin Gnos]] and coworkers, the meteorite's origin can be pinpointed to the vicinity of the [[Lalande (crater)\|Lalande impact crater]]; isotopic analysis shows a complex history of four distinct lunar impacts: "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~~Vol. 305, ~~pp657–9,~~no. ~~July~~5684 ~~2004)~~pp. 657–659. {{doi\|10.1126/science.1099397}}.</ref> ==See also== * [[Glossary of meteoritics]] * [[List of lunar meteorites]] ==External links== https://archive.today/20030604170334/http://epsc.wustl.edu/admin/resources/meteorites/sau169.html http://illite.unibe.ch/sau169/ ==References== http://www.ilexikon.com/Sayh_al_Uhaymir_169.html {{Reflist}} http://www.zeit.de/2004/33/3_Fragen {{Meteorites}} {{Meteorites by name}} [[Category:Meteorites found in Oman]] [[Category:Lunar meteorites]] [[Category:2002 in Oman]] [[deCategory:~~Sayh~~2002 alin ~~Uhaymir 169~~science]] [[Category:January 2002 events in Asia]]