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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
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 604 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 13 May 2022
Writeuphelp
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:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022
Mass (g):81
Pieces:1
Class:Ureilite
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
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Photos:
CreditPhotos
Public domain photographs:
Ansgar Greshake               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8390 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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