Meteoritical Bulletin: Entry for Northwest Africa 11473

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Northwest Africa 11473

Basic information

Name: Northwest Africa 11473
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11473
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 230 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	LL(L)3
Recommended:			LL(L)3 [explanation]

This is 1 of 24 approved meteorites classified as LL(L)3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 19 Oct 2017

Writeup

Writeup from MB 106:

Northwest Africa 11473 (NWA 11473)

(Northwest Africa)

Purchased: March 2017

Classification: Ordinary chondrite (LL(L)3)

History: Purchased from a Moroccan meteorite dealer in Quarzazate, Morocco.

Physical characteristics: Single stone, weathered exterior with many chondrules exposed. Saw cut reveals numerous densely packed chondrules in a brown-orange groundmass.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows may porphyritic chondrules, average apparent chondrule diameter 670±430 μm (n=18). Opaque, fine grained matrix present.

Geochemistry: (C. Agee and A. Santos, UNM) Olivine Fa_14.5±8.0, Mn/Fe=53±36, Cr₂O₃=0.12±0.11 wt%, n=17; low Ca pyroxene Fs_14.3±7.7Wo_3.3±3.1, n=8.

Classification: Ordinary chondrite (LL(L)3), estimated subtype ~3.3.

Specimens: 24.2 g on deposit at UNM, Morten Bilet holds the main mass.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Ouarzazate, Morocco
Date:	P March 2017
Mass (g):	230
Pieces:	1
Class:	LL(L)3
Shock stage:	S3
Weathering grade:	W3
Fayalite (mol%):	14.5±8.0
Ferrosilite (mol%):	14.3±7.7
Wollastonite (mol%):	3.3±3.1
Classifier:	C. Agee, UNM
Type spec mass (g):	24.2
Type spec location:	UNM
Main mass:	Morten Bilet
Comments:	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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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