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| Sayh al Uhaymir 402 | |||||||||
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| Basic information | Name: Sayh al Uhaymir 402 This is an OFFICIAL meteorite name. Abbreviation: SaU 402 Observed fall: No Year found: 2004 Country: Oman Mass:  78 g | ||||||||
| Classification history: |
This is 1 of 5 approved meteorites classified as Enst achon-ung. [show all] Search for other: Achondrites, Enstatite achondrites, Enstatite-rich meteorites, and Ungrouped achondrites | ||||||||
| Comments: | Approved 9 Sep 2006 | ||||||||
| Writeup |
Writeup from MB 90:
Sayh al Uhaymir 402 21°4′37′′N, 57°16′11′′E Oman Find: 2004 Achondrite (ungrouped enstatite) History: A meteorite collector recovered a single stone was found in the desert of Oman. Physical Characteristics: The stone, weighing 78 g, has a brown surface color and is free of fusion crust. Petrography: (D. D. Badjukov, Vernad; F. Brandstätter, NHMV) The meteorite consists of <2 millimeter-size silicate clasts embedded in an iron oxide groundmass; the silicate clasts are composed of fine (0.002–0.5 mm, average 0.05 mm) fragments of enstatite crystals in a matrix consisting of aggregates of a few millimeters wide plagioclase laths in a transparent glass. Fine droplets and blebs of metal, niningerite, and troilite are dispersed in the glass. Silicate mode (vol%) for enstatite and matrix is 63% and 37%, respectively. Mineral chemistry: Enstatite (Fs1Wo1), glass (SiO2 = 70–75, Al2O3 = 17–18, MgO = 4–5, Na2O = 5–6, FeO and K2O < 1 [all wt%]), metal (Si = 2 wt%), niningerite (Ca = 1.3, Cr = 1.8 [both wt%]); troilite contains Cr, Ti, and Mn. Classification: Achondrite (ungrouped enstatite). The texture and mineralogy imply that it could be an impact melt rock; relic fragments of enstatite show strong mosaicism and planar features. The meteorite is permeated by iron oxides (45 vol%) but the silicate clasts are unaltered. Specimens: A 17.0 g type specimen and one thin section are on deposit at Vernad. An anonymous collector holds the main mass. | ||||||||
| Data from: MB90 Table 5 Line 66: |
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| Institutions and collections |
NHMV: Naturhistorisches Museum, Burgring 7, 1010 Wien, Austria, Austria; Website (institutional address; updated 18 Jan 2019) Vernad: Vernadsky Institute of Geochemistry and Analytical Chemistry, Russia (institutional address; updated 21 Feb 2016) |
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| References: | Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Geography:
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Statistics: 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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