Meteoritical Bulletin: Entry for Northwest Africa 6969

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Northwest Africa 6969

Basic information

Name: Northwest Africa 6969
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6969
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass: 7 g

Classification
history:

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

This is 1 of 274 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 24 Sep 2016

Writeup

Writeup from MB 105:

Northwest Africa 6969 (NWA 6969)

(Northwest Africa)

Purchased: 2011

Classification: HED achondrite (Eucrite, monomict)

History: The meteorite was bought in 2011 from a local meteorite dealer in Erfoud, Morocco.

Physical characteristics: The small meteorite shows a light-grayish interior and is crosscut by numerous black shock veins. It is partly covered by fusion crust.

Petrography: The meteorite is a basaltic breccia dominantly composed of up to 200 μm sized exsolved pyroxenes and lath-shaped calcic plagioclase. Minor phases are chromite, ilmenite and silica.

Geochemistry: low-Ca pyroxene: Fs_59.7±1.0Wo_2.5±0.9(Fs_75.4-61.0Wo_2.0-4.7, n=13, FeO/MnO=28-33); Ca-pyroxene: Fs_26.6±1.3Wo_43.0±1.5(Fs_25.1-31.5Wo_37.6-44.9, n=23, FeO/MnO=27-35); calcic plagioclase: An_88.9±0.4(An_88.0-89.5, n=15)

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2011
Mass (g):	7
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	59.7; 26.6
Wollastonite (mol%):	2.5; 43.0
Classifier:	A. Greshake, MNB
Type spec mass (g):	1.6
Type spec location:	MNB
Main mass:	Stefan Ralew
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

Catalogs:

References:

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

Find references in NASA ADS:
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Photos:

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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