Meteoritical Bulletin: Entry for Northwest Africa 7834

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Northwest Africa 7834

Basic information

Name: Northwest Africa 7834
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7834
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 905 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 30 Nov 2013

Writeup

help

Writeup from MB 102:

Northwest Africa 7834 (NWA 7834)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased jointly by Darryl Pitt and David Gheesling in February 2013 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of numerous mineral fragments and rare ophitic-textured mare basalt clasts in a vesicular, glassy matrix. Minerals are anorthite, olivine, unexsolved pigeonite, subcalcic augite, exsolved pigeonite, Ti-bearing chromite, Cr-bearing ulvöspinel, ilmenite, troilite, minor silica polymorph and tiny shred-like grains of kamacite.

Geochemistry: Olivine (Fa_32.3, FeO/MnO = 93; Fa_92.9, FeO/MnO = 83), pigeonite (Fs_28.8-35.4Wo_9.9-5.7; FeO/MnO = 52-56), subcalcic augite (Fs_18.0Wo_37.9; FeO/MnO = 46). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances of FeO 12.9 wt.%, and (in ppm) Sc 25, La 6.4, Sm 3.1, Eu 0.81, Yb 2.3, Th 0.9.

Classification: Lunar (mingled regolithic breccia).

Specimens: 20.2 g are at UWB. The remainder is with the owners.

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2013 Feb
Mass (g):	905
Pieces:	1
Class:	Lunar (feldsp. breccia)
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	32.3; 92.9
Ferrosilite (mol%):	28.8-35.4
Wollastonite (mol%):	9.9-5.7
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20
Type spec location:	UWB
Main mass:	D. Pitt and D. Gheesling
Comments:	29.1; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

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

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Photos:

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

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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