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Northwest Africa 13334
Basic information Name: Northwest Africa 13334
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13334
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 526 g
Recommended:  Ureilite    [explanation]

This is 1 of 605 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 3 Jul 2020
Writeup from MB 109:

Northwest Africa 13334 (NWA 13334)

Northwest Africa

Purchased: 2009

Classification: Ureilite

Physical characteristics: Found as 109 small stones; coarse-grained, dark, with weathered, vein-like, interstitial materials.

Petrography: A somewhat coarse-grained but otherwise typical ureilite texture and mode, mostly olivine but roughly 1/4 pigeonite. Granular yet curvy-bounded silicate grains are up to 6 mm across, but 2 mm is more typical. Tiny metals are present in reduced rims within olivine. Minor vein-like interstitial matter is weathered, largely opaque (carbon-rich, probably).

Geochemistry: Mineral compositions and geochemistry: The olivine cores are Fa18.8±0.1 (6 analyses), but rims are as Fe-poor as Fa2.1. Minor elements in the olivine cores average 0.62±0.06 wt% Cr2O3, 0.36±0.08 wt% MnO, and 0.31±0.05 wt% CaO. The pyroxene is a pigeonite, Fs16.3Wo6.3, with no analytically significant range for major elements among 6 analyses. Minor elements in the pigeonite average 1.14±0.02 wt% Cr2O3, 0.90±0.03 Al2O3, and 0.41±0.06 wt% MnO.

Classification: Ureilite

Specimens: a type specimen, 24.1 g, is at UCLA; also 24.9 g is at UBayr. Main mass: Sean Tutorow (Tutorow’s web site: www.eegooblago.com; Tutorow’s email: mexmeteor@hotmail.com).

Data from:
  Table 0
  Line 0:
Place of purchase:Quartzite, Arizona
Date:P 2009
Mass (g):526
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):18.8 (cores), zoned to 2.1 (rims)
Ferrosilite (mol%):16.3
Wollastonite (mol%):6.3
Classifier:P. Warren, UCLA
Type spec mass (g):24 g
Type spec location:UCLA
Main mass:Sean Tutorow
Comments:Submitted by Paul Warren
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
UBayr: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany (institutional address; updated 5 Feb 2020)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8509 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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