Meteoritical Bulletin: Entry for Northwest Africa 6579

header

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 6579

Basic information

Name: Northwest Africa 6579
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6579
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 95 g

Classification
history:

Meteoritical Bulletin:	MB 99	(2011)	L-melt rock
Recommended:			L-melt rock [explanation]

This is 1 of 52 approved meteorites classified as L-melt rock. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 27 Mar 2011

Writeup

help

Writeup from MB 99:

Northwest Africa 6579 (NWA 6579)

(Northwest Africa)

Purchased: July, 2005

Classification: Ordinary chondrite (L, melt rock)

History: A portion of the sample was donated to Cascadia on August 15, 2005.

Physical characteristics: The rock lacks fusion crust and has a reddish-brown weathered exterior that contains metallic protrusions and parallel elongate vesicles up to 5 mm long.

Petrography: (A.Ruzicka and K. Hauver, Cascadia) The sample consists primarily of fine-grained (~25 μm across) euhedral-subhedral olivine set in glass; cellular- and dendritic-textured metal-sulfide nodules partly line vesicles.

Geochemistry: olivine Fa_22.4±0.8(n=24); martensite Ni 12.0±3.0 wt% and Co 0.58±0.03 wt% (n=30).

Classification: Ordinary chondrite (L) melt rock. Olivine composition is in the range for L chondrites and martensite composition is similar to the bulk composition of metal in L chondrites. Silicate and metal-sulfide textures suggest rapid cooling from a melt.

Specimens: Type specimens available at Cascadia include 4 pieces originally totaling 21.1 g, with one polished thin section and one polished butt made from one piece. Reed holds the main mass.

Data from:
  MB99
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P July, 2005
Mass (g):	95
Pieces:	1
Class:	L-melt rock
Shock stage:	high
Weathering grade:	W2
Fayalite (mol%):	22.4
Classifier:	A. Ruzicka, K. Hauver
Type spec mass (g):	21.1
Type spec location:	Cascadia
Main mass:	Reed
Comments:	Field number CML0358.; submitted by A. Ruzicka

Institutions
and collections

Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]

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