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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:
Recommended:  LL3    [explanation]

This is 1 of 441 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 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 1250 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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