Meteoritical Bulletin: Entry for Northwest Africa 10684

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Northwest Africa 10684

Basic information

Name: Northwest Africa 10684
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10684
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 165.5 g

Classification
history:

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

This is 1 of 218 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 2 Jul 2016

Writeup

Writeup from MB 105:

Northwest Africa 10684 (NWA 10684)

(Northwest Africa)

Purchased: 2016 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Aras Jonikas in February 2016 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen consisting of diabase clasts within a matrix of related debris. Minerals are exsolved pigeonite, orthopyroxene, clinopyroxene, calcic plagioclase, silica polymorph, ilmenite, troilite and minor Ti-chromite.

Geochemistry: Orthopyroxene (Fs_59.1-59.5Wo_1.6-1.7, FeO/MnO = 31-32, N = 3), clinopyroxene exsolution lamella (Fs_25.2Wo_42.6, FeO/MnO = 31), discrete clinopyroxene (Fs_24.0Wo_44.9, FeO/MnO = 26), plagioclase (An_84.8-86.3Or_0.9-0.8, N = 2).

Classification: Eucrite (monomict diabasic breccia).

Specimens: 20.47 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016 Feb
Mass (g):	165.5
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	59.1-59.5; 24.0-25.2
Wollastonite (mol%):	1.6-1.7; 44.9-42.6
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.47
Type spec location:	PSF
Main mass:	A. Jonikas
Comments:	AJ16-8; 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)

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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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Wang Ziyao

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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