Meteoritical Bulletin: Entry for Northwest Africa 7819

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Northwest Africa 7819

Basic information

Name: Northwest Africa 7819
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7819
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 21 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	CO3
Recommended:			CO3 [explanation]

This is 1 of 642 approved meteorites (plus 1 unapproved name) classified as CO3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites

Comments:

Approved 1 Jul 2014

Writeup

Writeup from MB 103:

Northwest Africa 7819 (NWA 7819)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Carbonaceous chondrite (CO3)

History: Purchased by GHupé in February 2013 from a dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Composed of very small, well-formed chondrules (0.2-0.7mm)and rare, small, fine grained CAIs in a deep brown, very fine grained matrix. Olivine, orthopyroxene, subcalcic augite and augite.

Geochemistry: Olivine (Fa_0.3-52.8; Cr₂O₃ in ferroan olivine = 0.09-0.15 wt.%, mean 0.11 wt.%, s.d. 0.02 wt.%, N = 7), orthopyroxene (Fs_0.7-1.4Wo_0.9-3.5), subcalcic augite (Fs_1.0Wo_33.7), augite (Fs_0.8-1.7Wo_41.7-40.1; Fs_25.4Wo_49.0).

Classification: Carbonaceous chondrite (CO3).

Specimens: A total of 20.2 g of material and one polished thin section are on deposit at UWB. GHupé holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Tucson
Date:	P 2013 Feb
Mass (g):	21
Pieces:	1
Class:	CO3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	0.3-52.8
Ferrosilite (mol%):	0.7-1.4
Wollastonite (mol%):	0.9-3.5
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	4.2
Type spec location:	UWB
Main mass:	GHupé
Comments:	GH-451; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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