Meteoritical Bulletin: Entry for Northwest Africa 13114

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Northwest Africa 13114

Basic information

Name: Northwest Africa 13114
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13114
Observed fall: No
Year found: 2019
Country: Algeria
Mass: 1787 g

Classification
history:

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 9 Feb 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13114 (NWA 13114)

Algeria

Purchased: 2019 Apr

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Mbark Arjdal in April 2019 from an Algerian dealer.

Petrography: (A. Irving, UWS, and J. Boesenberg, BrownU) Well-formed granular, PO and BO chondrules (apparent diameter 1040±480 µm, N = 24; some glass-bearing) together with amoeboid, very fine grained CAI occur in a highly oxidized matrix (~30 vol.%, red-brown in thin section). Cr-bearing magnetite is present in chondrules. Accessory phases in the matrix include pentlandite, troilite and chromite; metal is absent.

Geochemistry: Olivine (Fa_22.9±16.6(range Fa_1.1-43.2, N = 12), low-Ca pyroxene (Fs_0.5±0.1Wo_0.7±0.1(range Fs_0.40.05Wo_0.6-0.8, N = 5), high-Ca pyroxene (Fs_0.3±0.1Wo_19.5±2.0(range Fs_0.2-0.5Wo_16.6-21.1, N = 5), magnetite in chondrules (Cr₂O₃ = 1.3-2.3 wt.%, NiO = 0.06 wt.%, N = 3).

Classification: Carbonaceous chondrite (CV3, oxidized subclass).

Specimens: 66 g including one polished thin section at UWB; main mass with Mr. M. Arjdal.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2019 Apr
Mass (g):	1787
Pieces:	several
Class:	CV3
Shock stage:	S2
Weathering grade:	moderate
Fayalite (mol%):	22.9±16.6
Ferrosilite (mol%):	0.5±0.1
Wollastonite (mol%):	0.7±0.1
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	66
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj ZM 113; 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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

Find references in NASA ADS:
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Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1133 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)

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