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Northwest Africa 15429
Basic information Name: Northwest Africa 15429
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15429
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 968 g
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 431 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15429 (NWA 15429)

Algeria

Purchased: 2020

Classification: Ordinary chondrite (LL3)

History: Purchased by L. A. Boltryk in 2020 from a Spanish dealer, who had obtained the material from an Algerian source.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Closely packed, well-formed, unequilibrated chondrules (apparent diameter 920±370 µm, N = 26) containing devitrified glass are set in a fine grained matrix containing altered kamacite, taenite, troilite, chromite and minor secondary calcite.

Geochemistry: Olivine (Fa23.3±10.8, range Fa1.5-44.4, N = 19; Cr2O3 in ferroan olivine 0.02-0.18 wt.%, mean 0.06±0.04 wt.%, N = 18), low-Ca pyroxene (Fs17.1±6.8Wo1.5±1.4, range Fs2.9-26.2Wo0.2-4.3, N = 9), pigeonite (Fs17.6Wo5.4; Fs21.4Wo8.5), augite (Fs12.5Wo43.0). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.50.

Classification: Ordinary chondrite (LL3).

Specimens: 24.8 g including one polished thin section at PSF; remainder with Mr. L. Boltryk.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Spain
Date:P 2020
Mass (g):968
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.3±10.8
Ferrosilite (mol%):17.1±6.8
Wollastonite (mol%):1.5±1.4
Magnetic suscept.:3.50
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):22.6
Type spec location:PSF
Main mass:L. Boltryk
Comments:Work name BOL-002; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1232 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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