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Northwest Africa 11775
Basic information Name: Northwest Africa 11775
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11775
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 63 g
Classification
  history:
Recommended:  Ureilite    [explanation]

This is 1 of 481 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 11 May 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11775 (NWA 11775)

Morocco

Purchased: 2018 Jan

Classification: Ureilite

History: The sample was bought in Malaga, Spain, from a Saharawi meteorite dealer

Petrography: (K. Metzler, IfP) Ultramafic rock with metamorphic texture (~120° triple junctions), consisting of olivine and pyroxene grains up to ~1.5 mm. Reverse zoning of olivine grains with Mg-rich zones at the margins and along cracks. Metal is concentrated along grain boundaries and cracks and partly oxidized by terrestrial weathering.

Geochemistry: Mineral compositions and geochemistry: Olivine cores (n=10): Fa20.1±0.3; Olivine rims (n=5): Fa7.7±2.3. Pyroxene grains (n=10): Fs17.3±0.3Wo3.6±0.1. The mean concentration of Cr2O3 in olivine and pyroxene is 0.5 wt% and 0.7 wt%, respectively.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Malaga, Spain
Date:P 2018 Jan
Mass (g):63
Pieces:2
Class:Ureilite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):20.1; 7.7
Ferrosilite (mol%):17.3
Wollastonite (mol%):3.6
Classifier:K. Metzler, IfP
Type spec mass (g):13
Type spec location:IfP, Münster
Main mass:José Antonio Sanchez Santana, Malaga, Spain
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1322 approved meteorites from Morocco (plus 15 unapproved names) (plus 1 impact crater)

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