Meteoritical Bulletin: Entry for Northwest Africa 5676

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Northwest Africa 5676

Basic information

Name: Northwest Africa 5676
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5676
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 144.8 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Eucrite-br
Recommended:			Eucrite-br [explanation]

This is 1 of 237 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 23 Jul 2016

Writeup

Writeup from MB 105:

Northwest Africa 5676 (NWA 5676)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was bought in 2008 from a Moroccan meteorite dealer on a mineral fair in Bruegg, Switzerland.

Petrography: The meteorite is a brecciated eucrite composed of lithic and mineral clasts set into a clastic matrix. Dominant minerals in matrix and basaltic clasts are exsolved pyroxene and calcic plagioclase. Minor phases include chromite and silica. The meteorite contains abundant almost black melt clasts. Some regions show brownish staining due to terrestrial alteration.

Geochemistry: low-Ca pyroxene: Fs_60.5±0.9Wo_3.5±0.7(Fs_58.6-61.7Wo_2.6-5.0, n=16, FeO/MnO=30-32); Ca-pyroxene: Fs_26.4±3.5Wo_41.5±2.5(Fs_22.8-35.4Wo_34.7-44.3, n=18, FeO/MnO=27-32); calcic plagioclase: An_86.3±4.7(An_79.0-92.9, n=12)

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Bruegg, Switzerland
Date:	P 2008
Mass (g):	144.75
Pieces:	1
Class:	Eucrite-br
Shock stage:	moderate
Weathering grade:	moderate
Ferrosilite (mol%):	60.5; 26.4
Wollastonite (mol%):	3.5; 41.5
Classifier:	A. Greshake, MNB
Type spec mass (g):	21
Type spec location:	MNB
Main mass:	Marc Jost
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Space Jewels

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.

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