Meteoritical Bulletin: Entry for Northwest Africa 7814

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Northwest Africa 7814

Basic information

Name: Northwest Africa 7814
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7814
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 916 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	LL3
Recommended:			LL3 [explanation]

This is 1 of 452 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 8 Nov 2014

Writeup

Writeup from MB 103:

Northwest Africa 7814 (NWA 7814)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Ordinary chondrite (LL3)

History: Purchased by M. Cimała from a Moroccan dealer in February 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Closely packed, mostly medium-sized (some larger) and well-formed chondrules (0.7-2.8 mm, mean diameter 1.7 mm). Minerals are olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, troilite, chromite and altered kamacite.

Geochemistry: Olivine (Fa_0.6-51.8; Cr₂O₃ in ferroan olivine = 0.05-0.13 wt.%, mean 0.08 wt.%, s.d. = 0.03 wt.%, N = 8), orthopyroxene (Fs_0.7-21.3Wo_0.5-0.8, N = 3), subcalcic augite (Fs_20.1Wo_26.7), augite (Fs_13.8Wo_37.8).

Classification: Ordinary chondrite (LL3).

Specimens: A total of 20.1 g of material and one polished thin section are on deposit at UWB. M. Cimała holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2013 Feb
Mass (g):	916
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	0.6-51.8
Ferrosilite (mol%):	0.7-21.3
Wollastonite (mol%):	0.5-0.8
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.1
Type spec location:	UWB
Main mass:	M. Cimala
Comments:	MC110; submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Woreczko Jan & Wadi

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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