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Northwest Africa 8037
Basic information Name: Northwest Africa 8037
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8037
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 1460 g
Meteoritical Bulletin:  MB 102  (2013)  H3
Recommended:  H3    [explanation]

This is 1 of 707 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 30 Dec 2013
Writeup from MB 102:

Northwest Africa 8037 (NWA 8037)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Ordinary chondrite (H3)

History: Purchased by Eric Twelker in February 2013 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fresh specimen composed of very closely-packed, well-formed, medium-sized (0.4-2.1 mm) chondrules in a sparse black matrix with very low metal content. Olivine, orthopyroxene, pigeonite, diopside, sodic plagioclase, altered kamacite, taenite, troilite and rare chromite.

Geochemistry: Olivine (Fa0.5-94.8; Cr2O3 in ferroan olivine 0.09-0.22 wt.%, mean 0.12±0.05 wt.%, N = 8), orthopyroxene (Fs0.8-22.4Wo0.5-3.2), pigeonite (Fs22.9Wo10.7), diopside (Fs2.4Wo39.3). Oxygen isotopes (K. Ziegler, UNM): analyses of acid-washed subsamples by laser fluorination gave (all in per mil): δ17O = 2.700, 2.988, 2.873; δ18O = 3.800, 4.255, 4.097; Δ17O = 0.694, 0.741, 0.710 (for a TFL slope of 0.528 per mil).

Classification: Ordinary chondrite (Type 3). The low metal content and freshness of this unequilibrated chondrite specimen are at odds with its oxygen isotopic composition, which plots on the trend for H chondrites.

Specimens: 23.7 g and one polished thin section are at UWB. The remainder is held by Twelker.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2013 Feb
Mass (g):1460
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):0.5-94.8 (n = 10)
Ferrosilite (mol%):0.8-22.4
Wollastonite (mol%):0.5-3.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):23.7
Type spec location:UWB
Main mass:E. Twelker
Comments:ETNWA13-1; submitted by A. Irving
Plots: O isotopes:  
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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     This is 1 of 9570 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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