Meteoritical Bulletin: Entry for Northwest Africa 10690

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Northwest Africa 10690

Basic information

Name: Northwest Africa 10690
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10690
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 243 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	LL7
Recommended:			LL7 [explanation]

This is 1 of 102 approved meteorites classified as LL7. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 2 Jul 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10690 (NWA 10690)

(Northwest Africa)

Purchased: 2016 Mar

Classification: Ordinary chondrite (LL7)

History: Purchased by Fabien Kuntz in March 2016 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen with poikiloblastic texture and no evidence of relict chondrule structures. Minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, potassium feldspar, taenite, chromite, troilite and rare chlorapatite. Some feldspar consists of perthitic intergrowths of potassic and sodic phases.

Geochemistry: Olivine (Fa_29.9-30.0, N = 3), orthopyroxene (Fs_23.4-23.5Wo_3.7-3.6, N = 3), clinopyroxene (Fs_10.3-12.1Wo_42.5-38.9, N = 2), plagioclase (An_6.4-7.2Or_3.2-3.5, N = 2), potassium feldspar (Or_83.6-87.3An_6.1-5.7, N = 2).

Classification: Ordinary chondrite (LL7, K-feldspar-bearing).

Specimens: 20.45 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2016 Mar
Mass (g):	243
Pieces:	1
Class:	LL7
Shock stage:	S2
Weathering grade:	W0/1
Fayalite (mol%):	29.9-30.0
Ferrosilite (mol%):	23.4-23.5
Wollastonite (mol%):	3.7-3.6
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.45
Type spec location:	PSF
Main mass:	F. Kuntz
Comments:	K297; submitted by A. Irving

Institutions
and collections

PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 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)

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:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Denis gourgues
Solar Anamnesis

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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