Meteoritical Bulletin: Entry for Northwest Africa 7021

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 24 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 7021

Basic information

Name: Northwest Africa 7021
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7021
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 134 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	CO3
Recommended:			CO3 [explanation]

This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 4 Sep 2015

Writeup

Writeup from MB 104:

Northwest Africa 7021 (NWA 7021)

(Northwest Africa)

Purchased: 2009 Sep

Classification: Carbonaceous chondrite (CO3)

History: Purchased by Blaine Reed in September 2009 from a Moroccan dealer at the Denver Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively small chondrules (apparent diameter up to 500 μm, mean 150 μm) and small CAI are set in a much finer grained matrix (~30 vol.%) containing accessory kamacite.

Geochemistry: Olivine (Fa_0.5-46.7Cr₂O₃ in ferroan examples = 0.07-0.20, mean 0.11±0.06 wt.%, N = 7), orthopyroxene (Fs_1.6-3.7Wo_0.8-0.9, N = 3), subcalcic augite (Fs_26.6Wo_36.3), diopside (Fs_1.0Wo_44.3).

Classification: Carbonaceous chondrite (CO3).

Specimens: 20.3 g including one polished thin section and a polished slice at PSF; main mass with Reed.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Denver
Date:	P 2009 Sep
Mass (g):	134
Pieces:	1
Class:	CO3
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	0.5-46.7
Ferrosilite (mol%):	1.6-3.7
Wollastonite (mol%):	0.8-0.9
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.3
Type spec location:	PSF
Main mass:	B. Reed
Comments:	ST; 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)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 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