Meteoritical Bulletin: Entry for Northwest Africa 5695

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Northwest Africa 5695

Basic information

Name: Northwest Africa 5695
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5695
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 28 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	LL3-6
Recommended:			LL3-6 [explanation]

This is 1 of 40 approved meteorites classified as LL3-6. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 31 Mar 2016

Writeup

Writeup from MB 105:

Northwest Africa 5695 (NWA 5695)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (LL3-6)

Petrography: The meteorite is a chondritic breccia composed of LL3 to LL6 clasts set into a fine-grained clastic matrix. LL3 and LL4 clasts show perfect chondritic textures with clearly defined chondrules about 1 mm in diameter. Plagioclase grain size in LL5 clasts is about 30 µm and in LL6 clasts about 80 µm.

Geochemistry: Olivine and pyroxene in LL3 clasts are highly unequilibrated with Fa_23.8±9.3(1.0-32.4, n=25) and Fs_15.4±6.4Wo_1.0±0.7(Fs_1.8-25.1Wo_0.2-2.8, n=28). In LL5 and LL6 clasts olivine and pyroxene are equilibrated at Fa_29.8±0.4, n=15 and Fs_24.4±0.4Wo_0.7±0.4, n=27.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2005
Mass (g):	28
Pieces:	1
Class:	LL3-6
Shock stage:	S4
Weathering grade:	W1
Fayalite (mol%):	23.8±9.3 (1.0-32.4, n=25); 29.8±0.4 (n=15)
Ferrosilite (mol%):	15.4±6.4 (1.8-25.1, n=28); 24.4±0.4 (n=27)
Wollastonite (mol%):	1.0±0.7 (0.2-2.8, n=28); 0.7±0.4 (n=27)
Classifier:	A. Greshake, MNB
Type spec mass (g):	5.8
Type spec location:	MNB
Main mass:	Fabien Kuntz
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; 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)
Mike Markowitz
Ryan Upchurch

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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