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Sayh al Uhaymir 628
Basic information Name: Sayh al Uhaymir 628
     This is an OFFICIAL meteorite name.
Abbreviation: SaU 628
Observed fall: No
Year found: 2016
Country: Oman
Mass:help 9.41 kg
Recommended:  Ureilite    [explanation]

This is 1 of 630 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 10 Apr 2021
Writeup from MB 110:

Sayh al Uhaymir 628 (SaU 628)        20°48.176’N, 57°02.343’E

Al Wusta, Oman

Find: 08 Feb 2016

Classification: Ureilite

History: A single complete individual was found during a search for meteorites.

Physical characteristics: Dark brown rounded individual, wind-ablated, no fusion crust

Petrography: (T. Burri, E. Gnos, B. Hofmann) The sample consist mainly of olivine and pigeonite and shows the characteristic ureilitic texture, typical grain size is 0.8-2.0 mm. Olivine has reduced rims (width 50-100 μm) with minute Fe metal inclusions, partly oxidized due to weathering. Carbon platelets (up to 2 mm in length) consist dominantly of diamond. Silicates are weakly shocked (S2). Medium weathering, most iron metal oxidized while silicates are not affected.

Geochemistry: (T. Burri, NMBE) Olivine cores Fa21.8±0.3, Fe/Mn = 45±2, Cr2O3=0.62±0.05 wt% (N = 16), reduced Ol rims have Fa>4.7. Pigeonite has Fs18.5±0.8Wo5.8±1.9, Cr2O3 1.00±0.05 wt% (N = 20).

Classification: Based on texture, mineralogy and geochemistry this is an unbrecciated, monomict, ferroan ureilite.

Specimens: 135.6 g including one polished thin section at NMBE, main mass: MHTO

Data from:
  Table 0
  Line 0:
State/Prov/County:Al Wusta
Origin or pseudonym:Desert plain
Date:08 Feb 2016
Mass (g):9406
Shock stage:low
Weathering grade:medium
Fayalite (mol%):21.8±0.3 (N = 16)
Ferrosilite (mol%):18.5±0.8 (N = 20)
Wollastonite (mol%):5.8±1.9 (N = 20)
Classifier:T. Burri, E. Gnos, B. Hofmann
Type spec mass (g):135.6
Type spec location:NMBE
Main mass:MHTO
Finder:E. Gnos, B. Hofmann, Å. Rosén
Comments:Field number 1602_0182; submitted by Beda Hofmann
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
MHTO: Ministry of Heritage and Tourism Muscat , Oman (institutional address; updated 10 Apr 2021)
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Public domain photographs:
Beda Hofmann      

     Recommended::   (20° 48' 11"N, 57° 2' 21"E)

     This is 1 of 1756 approved meteorites from Al Wusta, Oman (plus 75 unapproved names)
     This is 1 of 4001 approved meteorites from Oman (plus 436 unapproved names)
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