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Northwest Africa 14999
Basic information Name: Northwest Africa 14999
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14999
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1250 g
Recommended:  CV3    [explanation]

This is 1 of 619 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 20 Jun 2022
Writeup from MB 111:

Northwest Africa 14999 (NWA 14999)

(Northwest Africa)

Purchased: 2022 Jan

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Eric Twelker in January 2022 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, unequilibrated chondrules (some with concentric rims, apparent diameter 1000±390 µm, N = 25) containing devitrified glass, together with relatively abundant CAI of several types, are set in a fine grained matrix (~30 vol.%, deep reddish-brown to opaque in thin section) containing Cr-bearing magnetite, troilite and kamacite. The CAI comprise amoeboid, very fine grained and relatively coarse granular types, and are composed of anorthite, diopside, hercynitic spinel, Mg-spinel, hibonite and perovskite.

Geochemistry: Olivine (Fa10.0±14.2, range Fa1.2-51.7, N = 11), low-Ca pyroxene (Fs1.1±0.3Wo0.8±0.0, range Fs0.8-1.4Wo0.8±0.0, N = 4), diopside (Fs1.3Wo47.8), magnetite (Cr2O3 2.0±1.5 wt.%, N = 7).

Classification: Carbonaceous chondrite (CV3).

Specimens: 22.0 g plus one polished thin section at UWB; remainder with Twelker.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2022 Jan
Mass (g):1250
Shock stage:S2
Weathering grade:low
Fayalite (mol%):10.0±14.2
Ferrosilite (mol%):1.1±0.3
Wollastonite (mol%):0.8±0.0
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):22.0
Type spec location:UWB
Main mass:Twelker
Comments:Work name ET22-1; submitted by A. Irving
   and collections
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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
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     This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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