Meteoritical Bulletin: Entry for Northwest Africa 10826

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Northwest Africa 10826

Basic information

Name: Northwest Africa 10826
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10826
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 256 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	L3.15
Recommended:			L3.15 [explanation]

This is 1 of 9 approved meteorites classified as L3.15. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 10 Oct 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 10826 (NWA 10826)

(Northwest Africa)

Purchased: 2015

Classification: Ordinary chondrite (L3.15)

History: Purchased by Gary Fujihara from Morocco, 2015.

Physical characteristics: Single stone, no fusion crust, saw cut shows many densely packed chondrules set in a brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, most with mesostasis or glass. Abundant opaque matrix. Apparent mean chondrule diameter 450±250 μm, n=39, and metal abundance consistent with L.

Geochemistry: (C. Agee and M. Spilde, UNM) Chondrule ferroan olivine Fa_15.3±8.6, Fe/Mn=42±16, Cr₂O₃=0.19±0.15 (wt%), n=30; chondrule low-Ca pyroxene Fs_14.9±9.6Wo_1.4±1.5, Fe/Mn=22±11, n=10.

Classification: Ordinary chondrite (L3.15), subtype 3.15 based on mean values of Fa and Fs and 1-sigma standard deviation, and on the ferroan olivine mean value of Cr₂O₃ and 1-sigma standard deviation, similar to Bishunpur (3.15) (Grossman and Brearley, 2005).

Specimens: 20.76 g including a probe mount on deposit at UNM, Gary Fujihara holds the main mass.

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2015
Mass (g):	255.78
Pieces:	1
Class:	L3.15
Shock stage:	S3
Weathering grade:	W2
Fayalite (mol%):	15.3±8.6
Ferrosilite (mol%):	14.9±9.6
Wollastonite (mol%):	1.4±1.5
Classifier:	C. Agee, UNM
Type spec mass (g):	20.76
Type spec location:	UNM
Main mass:	Gary Fujihara
Comments:	GF-5; submitted by C. Agee

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

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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Geography:

Coordinates:

Unknown.

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

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