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Northwest Africa 13869
Basic information Name: Northwest Africa 13869
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13869
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 667 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 573 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 28 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13869 (NWA 13869)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Ureilite

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

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: The meteorite shows a cumulate texture of olivine and pigeonite grains up to 2 mm in sizes. Olivine displays characteristic reduced rims in contact with FeNi-metal or graphite. The meteorite contains flaky graphite and calcite-filled cracks.

Geochemistry: reduced rims in olivine: Fa2.9-4.6; olivine contains 0.57±0.03 wt% Cr2O3 and 0.31±0.01 wt% CaO; pigeonite contains 1.39±0.06 wt% Cr2O3 and 1.72±0.08 wt% Al2O3

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021 Mar
Mass (g):667.2
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):20.8±0.1 (n=6)
Ferrosilite (mol%):17.5±0.2 (n=6)
Wollastonite (mol%):10.5±0.2 (n=6)
Classifier:A. Greshake, MNB
Type spec mass (g):24.2
Type spec location:MNB
Main mass:Hanno Strufe and Abdelfattah Gharad, Marrakesh, Morocco
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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7741 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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