Meteoritical Bulletin: Entry for Northwest Africa 13445

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 15 Apr 2024
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

Northwest Africa 13445

Basic information

Name: Northwest Africa 13445
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13445
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 542 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	L4
Recommended:			L4 [explanation]

This is 1 of 2062 approved meteorites (plus 5 unapproved names) classified as L4. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 10 Oct 2020

Writeup

Writeup from MB 109:

Northwest Africa 13445 (NWA 13445)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Ordinary chondrite (L4)

History: Purchased by John Divelbiss in October 2019 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed chondrules are set in a relatively coarse grained recrystallized matrix containing taenite, altered kamacite (in places accompanied by lawrencite), troilite, taenite, low-Ti chromite and chlorapatite.

Geochemistry: Olivine (Fa_23.6±0.2, range Fa_23.3-23.8, N = 4), low-Ca pyroxene (Fs_20.4±1.0Wo_1.3±0.1, range Fs_19.7-22.2Wo_1.2-1.4, N = 5), augite (Fs_6.4±0.1Wo_46.2±0.3, range Fs_6.3-6.5Wo_46.0-46.4, N = 2).

Classification: Ordinary chondrite (L4).

Specimens: 27.1 g including one polished thin section at UWB; remainder with Mr. J. Divelbiss.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2019 Oct
Mass (g):	542
Pieces:	1
Class:	L4
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	23.6±0.2
Ferrosilite (mol%):	20.4±1.0
Wollastonite (mol%):	1.3±0.1
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	27.1
Type spec location:	UWB
Main mass:	J. Divelbiss
Comments:	Work name JD20-4; 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)

Find references in NASA ADS:
Find references in Google Scholar:

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.

Direct link to this page