Meteoritical Bulletin: Entry for Northwest Africa 12887

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Northwest Africa 12887

Basic information

Name: Northwest Africa 12887
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12887
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 1772 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	L5
Recommended:			L5 [explanation]

This is 1 of 8890 approved meteorites (plus 5 unapproved names) classified as L5. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 7 Sep 2019

Writeup

Writeup from MB 108:

Northwest Africa 12887 (NWA 12887)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (L5)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by PSF, then sold in 2019 to the Harkness Collection.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Sparse chondrules occur within a recrystallized matrix containing altered metal.

Geochemistry: Olivine (Fa_24.6±0.4(range Fa_24.0-25.0, N = 5), low-Ca pyroxene (Fs_21.1±0.2Wo_1.2±0.2(range Fs_20.9-21.3Wo_1.0-1.4, N = 3).

Classification: Ordinary chondrite (L5).

Specimens: 25.04 g including one polished thin section at PSF; remainder in Harkness Collection.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Munich
Date:	P 2005
Mass (g):	1772
Pieces:	1
Class:	L5
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	24.6±0.4
Ferrosilite (mol%):	21.1±0.2
Wollastonite (mol%):	1.2±0.2
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	25.04
Type spec location:	PSF
Main mass:	Harkness Collection
Comments:	Work name HC1; 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: 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 Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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