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Northwest Africa 11754
Basic information Name: Northwest Africa 11754
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11754
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 304 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 531 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 26 May 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11754 (NWA 11754)

Morocco

Purchased: 2017 Jul

Classification: Ureilite

Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock with metamorphic texture (~120° triple junctions), consisting of olivine, low-Ca pyroxene, and Ca-pyroxene grains with sizes up to ~3 mm. Reverse zoning of olivine with Mg-rich zones at the margins and along cracks can be observed. Metal is concentrated along grain boundaries and cracks and mostly oxidized by terrestrial weathering.

Geochemistry: Mineral compositions and geochemistry: Olivine cores (n=4): Fa11.4±0.7; Olivine rims (n=3): Fa6.6±0.3. Low-Ca pyroxene grains (n=9): Fs10.7±0.2Wo4.9±0.2. Ca-pyroxene grains (n=12): Fs6.6±0.2Wo36.2.±0.2. The concentration of Cr2O3 in olivine and pyroxene is 0.5 wt% and 1.1 wt%, respectively.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Guelmim, Morocco
Date:P 2017 Jul
Mass (g):304
Pieces:1
Class:Ureilite
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):11.4; 6.6
Ferrosilite (mol%):10.7; 6.6
Wollastonite (mol%):4.9; 36.2
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP, Münster
Main mass:Nourddine Azelmat, Morocco
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, MAPS 55, 460-462
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1502 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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