Meteoritical Bulletin: Entry for Northwest Africa 11453

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Northwest Africa 11453

Basic information

Name: Northwest Africa 11453
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11453
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 73.1 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	Eucrite-pmict
Recommended:			Eucrite-pmict [explanation]

This is 1 of 425 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 13 Oct 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 11453 (NWA 11453)

(Northwest Africa)

Purchased: 2017 Apr

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Fabien Kuntz in April 2017 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of gabbroic and diabasic eucrite clasts plus coarse related debris in a sparse finer grained matrix. Some diogenitic orthopyroxene (~2 vol.%) is also present. Other minerals are exsolved pigeonite, calcic plagioclase, unexsolved pigeonite, augite, silica polymorph, ilmenite, chromite, troilite, merrillite and stained Ni-free metal.

Geochemistry: Diogenitic orthopyroxene (Fs_23.3-24.1Wo_2.3-2.2, FeO/MnO = 28-32, N = 2), host orthopyroxene (Fs_56.0-60.3Wo_4.4-4.3, FeO/MnO = 24-30, N = 2), clinopyroxene exsolution lamella (Fs_26.1Wo_41.5, FeO/MnO = 29), augite (Fs_9.8Wo_44.3; Fs_16.3Wo_43.5; FeO/MnO = 23; N = 2), pigeonite (Fa_36.5Wo_21.3, FeO/MnO = 26), plagioclase (An_77.5-79.0Or_1.5, N = 2).

Classification: Eucrite (polymict breccia).

Specimens:15.31 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2017 Apr
Mass (g):	73.1
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	23.3-24.1; 56.0-60.3; 26.1
Wollastonite (mol%):	2.3-2.2; 4.4-4.3; 41.5
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	15.31
Type spec location:	PSF
Main mass:	F. Kuntz
Comments:	Work name K334; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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