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Ureilites

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JaH1103

Name

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Structure Class

achondrites

Chemical Class

Ureilite

Country

Oman

Year found

2014

Mass

226 g

[Museum Collection]

(1) 8.12g

History: The meteorite was found in 2014 during a field trip in the Oman desert. Physical characteristics: Brownish individual lacking any fusion crust. Petrography: The meteorite shows a cumulate texture of up to 1.8 mm sized olivine and pigeonite grains. Olivine appears to be recrystallized to small up to 15 μm sized crystallites and pigeonite grains display patchy compositional zoning. Olivine shows characteristic reduced rims. The meteorite also contains flaky graphite. Geochemistry: Reduced rims in olivine: Fa6.4-14.0; olivine contains 0.43±0.08 wt% Cr2O3 and 0.29±0.05 wt% CaO

NWA2234

Name

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Structure Class

achondrites

Chemical Class

Ureilite

Country

Morocco

Year found

2000

Mass

422 g

[Museum Collection]

(1) 1.945g   (2) 1.776g   (3) 0.737g

A single 422 g stone was found by an anonymous person. Classification (H. Takeda, Chiba, A. Yamaguchi NIPR): The meteorite is a crystalline ureilite composed of coarse, shocked dusty olivine (cores Fo82-92, rims Fo94-98) and pigeonite (Wo9En74Fs17).  Opaque carbonaceous matters occurs in parts of narrow intergranular veins, mostly filled with iron oxides and hydroxides.  Shock stage S3, weathering grade W2.  Specimens: types specimen 20 g and thin section, NIPR, main mass Fectay.

Name

*click on the Name for more information

Structure Class

achondrites

Chemical Class

Ureilite

Country

Morocco

Year found

2002

Mass

237 g

[Museum Collection]

(1) 23.9g

NWA4852
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