Meteoritical Bulletin: Entry for Northwest Africa 6448

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 6448

Basic information

Name: Northwest Africa 6448
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6448
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 44.7 g

Classification
history:

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

This is 1 of 87 approved meteorites classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 24 Jan 2012

Writeup

Writeup from MB 100:

Northwest Africa 6448 (NWA 6448)

(Northwest Africa)

Purchased: 2010 June

Classification: Primitive achondrite (Winonaite)

History: Purchased by F. Kuntz at the St. Marie Show in June 2010.

Petrography: Metamorphic texture (grainsize 0.1-0.2 mm, with a few grains to 1 mm); triple junction grain boundaries are prevalent. Aggregate of olivine, orthopyroxene, clinopyroxene, kamacite, troilite, pentlandite, sodic plagioclase, and chlorapatite.

Geochemistry: Olivine Fa_4.7-4.9with Fe/Mn=11, orthopyroxene Fs_6.1-6.8Wo_2.3-2.4with Fe/Mn=8-10, clinopyroxene Fs_2.6-2.8Wo_45.5with Fe/Mn=6, and plagioclase An_14.7-14.8Or_3.7-4.0.Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed sub-samples by laser fluorination gave, respectively δ¹⁷O 2.167, 2.166; δ¹⁸O 5.134, 5.155; Δ¹⁷O -0.535, -0.547 per mil.

Classification: Winonaite

Data from:
  MB100
  Table 1
  Line 1384:

Place of purchase:	St. Marie
Date:	P 2010 June
Mass (g):	44.7
Pieces:	1
Class:	Winonaite
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	4.7-4.9
Ferrosilite (mol%):	6.1-6.8
Wollastonite (mol%):	2.3-2.4
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	9.06
Type spec location:	FMNH
Main mass:	FMNH
Comments:	Submitted by P. Sipiera

Plots:

O isotopes:

Institutions
and collections

FMNH: Department of Geology The Field Museum of Natural History 1400 South Lake Shore Drive Chicago, IL 60605-2496, USA, United States; Website (institutional address; updated 16 Nov 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)
Kuntz: Fabien Kuntz, France; Website (private address)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)

Catalogs:

References:

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

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

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Albert Calafell
Cute child
Guchen Chen
Jim K
Qi Lv
Wojciech Moscinski