Meteoritical Bulletin: Entry for Northwest Africa 5742

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 19 Mar 2023
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 5742

Basic information

Name: Northwest Africa 5742
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5742
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 180 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 510 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 26 Oct 2011

Writeup

Writeup from MB 100:

Northwest Africa 5742 (NWA 5742)

(Northwest Africa)

Found: Feb 2009

Classification: HED achondrite (Diogenite)

Petrography: (A. Irving and S. Kuehner, UWS): Fragmental breccia consisting of abundant angular mineral grains (mostly orthopyroxene and plagioclase) and a few lithic eucrite clasts in a finer grained matrix. Orthopyroxene is relatively abundant and exhibits more iron-rich rims against the matrix. Less abundant angular grains of silica also exhibit orthopyroxene reaction rims. Other phases are very calcic plagioclase, exsolved pigeonite (Fs_24.5Wo_7.0, FeO/MnO = 27.2), chromite, ilmenite and troilite.

Geochemistry: Orthopyroxene, Fs_24.5-33.2Wo_2.4-3.1, FeO/MnO=30.7-33.7; exsolved pigeonite, Fs_24.5Wo_7.0, FeO/MnO=27.2.

Data from:
  MB100
  Table 1
  Line 1280:

Place of purchase:	Tucson
Date:	Feb 2009
Mass (g):	180
Pieces:	1
Class:	Diogenite
Ferrosilite (mol%):	24.5-34.4
Wollastonite (mol%):	2.3-3.1; 7.0
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.0
Type spec location:	UWS
Main mass:	AHupe
Comments:	Submitted by 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

Direct link to this page