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Northwest Africa 14898
Basic information Name: Northwest Africa 14898
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14898
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 81 g
Meteoritical Bulletin:  MB 111  (2023)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 664 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 13 May 2022
Writeup from MB 111:

Northwest Africa 14898 (NWA 14898)

(Northwest Africa)

Purchased: 2022

Classification: Ureilite

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Brownish fragment largely covered fusion crust.

Petrography: The meteorite is a breccia predominantly composed of up to 2 mm sized weakly zoned olivine (about 72 vol%) and finely recrystallized pyroxene (about 25 vol%) displaying pronounced patchy zoning. Cataclastic, partly shock melted zones frequently ocurr between the mineral grains. Contains up to 300 µm sized graphite grains. Accessories include FeS and some metallic iron.

Geochemistry: olivine: Fa17.6±1.7 (Fa14.5-19.1, Cr2O3: 0.69±0.06 wt%, CaO: 0.47±0.03 wt%, FeO/MnO=35±4, n=10; pyroxene: Fs15.6±1.6Wo7.2±2.6 (Fs13.1-17.5Wo3.7-11.2, Cr2O3: 0.94±0.09 wt%, Al2O3: 0.20±0.11 wt%, FeO/MnO=23±2, n=20); bulk composition (µXRF; all wt%): SiO2: 40.2, TiO2: 0.05, Al2O3: 0.32, MgO: 35.6, CaO: 1.25, Cr2O3: 0.78, MnO: 0.44, FeO: 19.3, NiO: 0.11, S: 0.27

Classification: Ureilite, partly molten. Classification based on mineral and bulk composition plus presence of graphite. Brecciated and partly shock-melted specimen.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022
Mass (g):81
Shock stage:S1
Weathering grade:W2
Fayalite (mol%):17.6
Ferrosilite (mol%):15.6
Wollastonite (mol%):7.2
Classifier:A. Greshake, MNB
Type spec mass (g):16.2
Type spec location:MNB
Main mass:Mohamed Aid
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Public domain photographs:
Ansgar Greshake               

     This is 1 of 9772 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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