Meteoritical Bulletin: Entry for Northwest Africa 10271

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Northwest Africa 10271

Basic information

Name: Northwest Africa 10271
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10271
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 16.6 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Enst achon
Recommended:			Enst achon [explanation]

This is 1 of 12 approved meteorites classified as Enst achon. [show all]
Search for other: Achondrites, Enstatite achondrites, and Enstatite-rich meteorites

Comments:

Approved 3 Oct 2015

Writeup

Writeup from MB 104:

Northwest Africa 10271 (NWA 10271)

(Northwest Africa)

Purchased: 2014 Feb

Classification: Enstatite achondrite

History: Purchased by Dr. David DGregory in February 2014 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Aggregate of ~54 vol.% enstatite and ~45 vol.% kamacite with accessory daubreelite, schreibersite and diopside, plus rare heideite and perryite.

Geochemistry: Enstatite (Fs_0.1-0.4Wo_0.4-0.3, N = 3), kamacite (mean of 3 in wt.%: Ni 5.8, Co 0.4, Si 1.9, P 0.2).

Classification: Enstatite achondrite (metal-rich). This specimen is much too metal-rich to be regarded as an aubrite.

Specimens: The entire specimen including a polished probe mount is at ROM.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2014 Feb
Mass (g):	16.56
Pieces:	1
Class:	Enst achon
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	0.1-0.4
Wollastonite (mol%):	0.4-0.3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	16.56
Type spec location:	ROM
Main mass:	DGregory
Comments:	DGR017-14; submitted by A. Irving

Institutions
and collections

ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 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)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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Geography:

Coordinates:

Unknown.

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

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Revision
history:

This lists important revisions made to data for this record.

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