Meteoritical Bulletin: Entry for Northwest Africa 7674

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Northwest Africa 7674

Basic information

Name: Northwest Africa 7674
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7674
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 225 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	Lodranite
Recommended:			Lodranite [explanation]

This is 1 of 91 approved meteorites classified as Lodranite. [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites

Comments:

Approved 14 Nov 2013

Writeup

Writeup from MB 102:

Northwest Africa 7674 (NWA 7674)

(Northwest Africa)

Purchased: 2012 Dec

Classification: Primitive achondrite (Lodranite)

History: Purchased in Temara, Morocco by Adam Aaronson in December 2012.

Petrography: (A. Irving and S. Kuehner, UWS) Protogranular texture with grainsize from 0.3-0.8 mm. Constituent minerals are olivine, orthopyroxene, clinopyroxene, chromite, altered kamacite, taenite, and troilite.

Geochemistry: Olivine (Fa_10.2-12.4; FeO/MnO = 19-21), orthopyroxene (Fs_10.9-11.0Wo_4.0-3.8; FeO/MnO = 13), clinopyroxene (Fs_5.7-5.8Wo_40.1-40.2; FeO/MnO = 9-10). Oxygen isotopes (D. Rumble, CIW): analyses of acid-washed silicate material by laser fluorination gave, respectively: δ¹⁷O = 1.004, 0.764; δ¹⁸O = 3.488, 3.281; Δ¹⁷O = -0.831, -0.962 (all per mil).

Classification: Lodranite.

Specimens: 21.4 g of material and one polished thin section at UWB. The remaining material is held by Aaronson.

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Temara
Date:	P 2012 Dec
Mass (g):	225
Pieces:	1
Class:	Lodranite
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	10.2-12.4
Ferrosilite (mol%):	10.9-11.0
Wollastonite (mol%):	4.0-3.8
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21.4
Type spec location:	UWB
Main mass:	A. Aaronson
Comments:	M1471; submitted by A. Irving

Plots:

O isotopes:

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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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