Meteoritical Bulletin: Entry for Northwest Africa 6171

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Northwest Africa 6171

Basic information

Name: Northwest Africa 6171
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6171
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 44 g

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	Lodranite
Recommended:			Lodranite [explanation]

This is 1 of 86 approved meteorites classified as Lodranite. [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites

Comments:

Approved 24 Oct 2011

Writeup

Writeup from MB 100:

Northwest Africa 6171 (NWA 6171)

(Northwest Africa)

Purchased: 2009 Dec

Classification: Primitive achondrite (Lodranite)

Petrography: Fragmental breccia composed of coarse mineral and some polycrystalline clasts (up to 3 mm across) with finer interstitial debris of the same phases together with minor altered metal. Major minerals are olivine (FeO/MnO=23.2-24.3) and orthopyroxene (FeO/MnO=13-18), with subordinate clinopyroxene (some as exsolution lamellae in orthopyroxene; FeO/MnO=13-22) and chromite. Olivine grains contain characteristic small, irregularly-shaped polycrystalline inclusions composed mainly of pyroxene+chromite+pentlandite. Likely paired with NWA 4478, NWA 4875, NWA 4933, NWA 5403, NWA 5488 and NWA 6075.

Data from:
  MB100
  Table 1
  Line 1296:

Place of purchase:	Erfoud
Date:	P 2009 Dec
Mass (g):	44
Pieces:	1
Class:	Lodranite
Weathering grade:	low
Fayalite (mol%):	10.3-10.5
Ferrosilite (mol%):	8.0-10.5; 3.8-4.4
Wollastonite (mol%):	1.4-2.6; 44.0-41.1
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	10.6
Type spec location:	1.8 g at UWS; 8.8 g at Bathurst
Main mass:	TWebb
Comments:	Submitted by A. Irving

Institutions
and collections

UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
TWebb: No contact information provided., United States (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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