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Northwest Africa 15798
Basic information Name: Northwest Africa 15798
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15798
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 410 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2023)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 657 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 4 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15798 (NWA 15798)

(Northwest Africa)

Purchased: Jan 2023

Classification: Ureilite

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in January, 2023.

Physical characteristics: Dark brownish rock without fusion crust.

Petrography: The meteorite displays a protogranular texture of up to 3 mm sized olivine and pigeonite grains both showing characteristic reduced rims associated with fine-grained often altered FeNi-metal. The meteorite contains graphite and iron oxide veins decorating grain boundaries.

Geochemistry: reduced rims in olivine: Fa3.3-5.0; olivine contains 0.56±0.14 wt% Cr2O3 and 0.30±0.01 wt% CaO; reduced rims in pyroxene: Fs9.2-15.6Wo4.3-8.9; pigeonite contains 1.12±0.04 wt% Cr2O3 and 1.32±0.07 wt% Al2O3

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P Jan 2023
Mass (g):410
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:high
Fayalite (mol%):21.2±0.1 (n=10)
Ferrosilite (mol%):18.1±0.2 (n=10)
Wollastonite (mol%):9.2±0.1 (n=10)
Classifier:A. Greshake, MNB
Type spec mass (g):62.2
Type spec location:MNB
Main mass:Salamu Ali
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. 112, in preparation (2023)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Achim Sven Faforke   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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