Meteoritical Bulletin: Entry for Northwest Africa 11020

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Northwest Africa 11020

Basic information

Name: Northwest Africa 11020
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11020
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 286 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Eucrite-mmict
Recommended:			Eucrite-mmict [explanation]

This is 1 of 293 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 17 Dec 2016

Writeup

help

Writeup from MB 105:

Northwest Africa 11020 (NWA 11020)

(Northwest Africa)

Purchased: 2016 Jun

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Fabien Kuntz in June 2016 from a dealer in Tan Tan, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of basaltic eucrite clasts in a sparse, dark matrix containing minor barite. The mostly rounded clasts consist of exsolved pigeonite (pale orange-brown in thin section) and polycrystalline calcic plagioclase with accessory silica polymorph, fayalitic olivine, Ti-chromite, ilmenite (containing rare inclusions of baddeleyite) and minor Fe-Mg-bearing merrillite.

Geochemistry: Orthopyroxene host (Fs_59.2Wo_3.9, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs_27.4Wo_42.9, FeO/MnO = 29), clinopyroxene host (Fs_29.1Wo_42.1, FeO/MnO = 30), orthopyroxene exsolution lamella (Fs_62.9Wo_2.3, FeO/MnO = 30), fayalitic olivine (Fa_83.9-86.0, FeO/MnO = 26-32), plagioclase (An_85.0-90.0Or_1.0-0.3, N = 2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 2.96.

Classification: Eucrite (monomict breccia, shocked).

Specimens: 24.54 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Tan Tan
Date:	P 2016 Jun
Mass (g):	285.9
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	high
Weathering grade:	moderate
Ferrosilite (mol%):	59.2-62.9; 27.4-29.1
Wollastonite (mol%):	3.9-2.3; 42.9-42.1
Magnetic suscept.:	2.96
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	24.54
Type spec location:	PSF
Main mass:	F. Kuntz
Comments:	K305; 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)
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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