Meteoritical Bulletin: Entry for Northwest Africa 6572

header

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 29 May 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 6572

Basic information

Name: Northwest Africa 6572
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6572
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 50.2 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	Achondrite-ung
Recommended:			Achondrite-ung [explanation]

This is 1 of 131 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites

Comments:

Approved 18 Feb 2012

Writeup

help

Writeup from MB 100:

Northwest Africa 6572 (NWA 6572)

(Northwest Africa)

Purchased: Oct 2010

Classification: Ungrouped achondrite

History: Purchased in 2010 October by Thomas Webb from a Moroccan dealer in Erfoud.

Physical characteristics: A group of 17 similar-looking dark-brown stones weighing in total 50.2 g.

Petrography: Protogranular texture. Composed predominantly of olivine with accessory clinopyroxene, orthopyroxene, chromite, altered kamacite and troilite. Plagioclase is absent and no phosphate minerals were found.

Geochemistry: Olivine Fa_30.4-30.5, Fe/Mn=57-68; clinopyroxene Fs_9.5-9.7Wo_44.2-44.0, Fe/Mn=24-26, Cr₂O₃=0.75 wt%; orthopyroxene Fs_24.5-24.9Wo_2.1-2.2, Fe/Mn=35-37. Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed subsamples by laser fluorination gave, respectively δ¹⁷O=2.881, 2.956; δ¹⁸O=5.619, 5.701; Δ¹⁷O=-0.076, 0.044 per mil.

Classification: Achondrite (brachinite-like, ungrouped). Paired with NWA 5400, 5548, 6077, 6172, 6292, 6424, and 5363.

Specimens: A total of 10.1 g from two separate stones and one polished thin section are on deposit at UWS. Mr. T. Webb holds the main masses.

Data from:
  MB100
  Table 1
  Line 1422:

Place of purchase:	Erfoud
Date:	P Oct 2010
Mass (g):	50.2
Pieces:	17
Class:	Achondrite-ung
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	30.4-30.5
Ferrosilite (mol%):	9.5-9.7; 24.5-24.9
Wollastonite (mol%):	44.2-44.0; 2.1-2.2
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	10.1
Type spec location:	UWS
Main mass:	TWebb
Comments:	Submitted by A. Irving

Plots:

O isotopes:

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)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)
TWebb: No contact information provided., United States (private address)

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 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

Direct link to this page