Meteoritical Bulletin: Entry for Northwest Africa 8320

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Northwest Africa 8320

Basic information

Name: Northwest Africa 8320
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8320
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 52.2 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	CV3
Recommended:			CV3 [explanation]

This is 1 of 565 approved meteorites (plus 1 unapproved name) classified as CV3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites

Comments:

Approved 27 Jan 2015

Writeup

Writeup from MB 104:

Northwest Africa 8320 (NWA 8320)

(Northwest Africa)

Purchased: 2014 Feb

Classification: Carbonaceous chondrite (CV3)

History: Purchased by D. Pitt in February 2014 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Separated granular chondrules (mean 1.4±1.1 mm) and white, amoeboid 3 mm CAI in an orange-brown oxidized matrix.

Geochemistry: Olivine (Fa_0.3-7.3, N = 3), orthopyroxene (Fs_0.9-4.5Wo_1.4-3.3, N = 3), Al-Ti diopside in CAI (Fs_0.6-0.9Wo_54.2-46.3; Al₂O₃ 11.1-10.9 wt.%, TiO₂ 0.7-0.9 wt.%).

Classification: Carbonaceous chondrite (CV3).

Specimens: 10.5 g including one polished thin section at UWB. The remaining material is held by DPitt.

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2014 Feb
Mass (g):	52.2
Pieces:	1
Class:	CV3
Shock stage:	S2
Weathering grade:	moderate
Fayalite (mol%):	0.3-7.3
Ferrosilite (mol%):	0.9-4.5
Wollastonite (mol%):	1.4-3.3
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	10.5
Type spec location:	UWB
Main mass:	D. Pitt
Comments:	MAC0031; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (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 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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