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Northwest Africa 11738
Basic information Name: Northwest Africa 11738
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11738
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 57 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 471 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 19 Apr 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11738 (NWA 11738)

(Northwest Africa)

Purchased: 2012

Classification: Ureilite

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

Physical characteristics: Dark brownish individual without fusion crust.

Petrography: The meteorite shows a cumulus texture of up to 1.5 mm sized Cr-rich olivine and pigeonite crystals. It is brecciated, contains some flaky graphite and olivine displays pronounced reduced rims.

Geochemistry: reduced rims in olivine: Fa2.5-6.2; olivine contains 0.70±0.03 wt% Cr2O3 and 0.43±0.02 wt% CaO

Classification: Ureilite, brecciated

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Zagora, Morocco
Date:P 2012
Mass (g):57
Pieces:1
Class:Ureilite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):20.8±0.3 (n=17)
Ferrosilite (mol%):17.9±0.1 (n=16)
Wollastonite (mol%):8.0±0.1 (n=16)
Classifier:A. Greshake, MNB
Type spec mass (g):11.4
Type spec location:MNB
Main mass:Stefan Ralew
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6423 approved meteorites from (Northwest Africa) (plus 2023 unapproved names)

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