Meteoritical Bulletin: Entry for Northwest Africa 13447

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Northwest Africa 13447

Basic information

Name: Northwest Africa 13447
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13447
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 269 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	H3
Recommended:			H3 [explanation]

This is 1 of 710 approved meteorites (plus 2 unapproved names) classified as H3. [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 10 Oct 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13447 (NWA 13447)

(Northwest Africa)

Purchased: 2020 Mar

Classification: Ordinary chondrite (H3)

History: Purchased by John Divelbiss in March 2020 from Matthew Stream, who had acquired the specimen from a Moroccan dealer at the 2020 Tucson Gem and Mineral Show.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fairly closely-packed, well-formed unequilibrated chondrules (apparent diameter 700±490 µm, N = 23) are set in a recrystallized matrix containing altered kamacite, taenite (some Cu-bearing), troilite, silica polymorph and chlorapatite.

Geochemistry: Olivine (Fa_14.0±6.5, range Fa_0.6-18.2, N = 8; Cr₂O₃ in ferroan examples <0.04 wt.%), low-Ca pyroxene (Fs_13.2±3.6Wo_1.8±1.9, range Fs_8.7-17.3Wo_0.3-4.7, N = 5), augite (Fs_6.6±2.5Wo_40.1±2.8, range Fs_4.8-8.4Wo_38.1-42.0, N = 2).

Classification: Ordinary chondrite (H3).

Specimens: 26.8 g including one polished thin section at UWB; remainder with Mr. J. Divelbiss.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Riverside, CA
Date:	P 2020 Mar
Mass (g):	269
Pieces:	1
Class:	H3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	14.0±6.5
Ferrosilite (mol%):	13.2±3.6
Wollastonite (mol%):	1.8±1.9
Magnetic suscept.:	5.21
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	26.8
Type spec location:	UWB
Main mass:	J. Divelbiss
Comments:	Work name JD20-5; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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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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