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Northwest Africa 15485
Basic information Name: Northwest Africa 15485
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15485
Observed fall: No
Year found: 2007
Country: Algeria
Mass:help 75 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  LL3
Recommended:  LL3    [explanation]

This is 1 of 487 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 4 Dec 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15485 (NWA 15485)

Algeria

Purchased: 2007

Classification: Ordinary chondrite (LL3)

History: Found in Algeria in 2007 and given by the anonymous finder to a team of Sahrawi meteorite hunters represented by David Lehman.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed unequilibrated chondrules (apparent diameter 960±410 µm, N = 26) containing devitrified glass and some plagioclase are set in a fine grained matrix containing kamacite, taenite, troilite, chromite, augite, pigeonite, merrillite (as rare inclusions in chromite) and chlorapatite.

Geochemistry: Olivine (Fa31.2±14.0, range Fa12.9-74.0, N = 13; Cr2O3 in ferroan olivine 0.01-0.05 wt.%, mean 0.03±0.02 wt.%, N = 12), low-Ca pyroxene (Fs18.3±6.9Wo0.8±0.5, range Fs7.2-24.4Wo0.3-1.7, N = 8), pigeonite (Fs21.3Wo9.6), augite (Fs12.5Wo43.0). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.94.

Classification: Ordinary chondrite (LL3).

Specimens: 17.5 g including one polished thin section at UWB; remainder with Mr. D. Lehman.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2007
Mass (g):75
Pieces:1
Class:LL3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):31.2±14.0
Ferrosilite (mol%):18.3±6.9
Wollastonite (mol%):0.8±0.5
Magnetic suscept.:3.94
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):17.5
Type spec location:UWB
Main mass:D. Lehman
Comments:Work name DL 1133; submitted by A. Irving
Institutions
   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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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Revision
  history:
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