Meteoritical Bulletin: Entry for Northwest Africa 8344

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Northwest Africa 8344

Basic information

Name: Northwest Africa 8344
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8344
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 1496 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Eucrite-mmict
Recommended:			Eucrite-mmict [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 27 Apr 2014

Writeup

help

Writeup from MB 103:

Northwest Africa 8344 (NWA 8344)

(Northwest Africa)

Purchased: 2013

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Brahim Tahiri from a Moroccan hunter and sent to his partner Sean Tutorow for classification, 2013.

Physical characteristics: Three stones with identical appearance (1380.27 g, 75.23 g, 40.20 g), irregular dark brown weathered exterior. Saw cut reveals breccia with white clasts up to 1 cm set in a dark matrix, vesicles up to 4 mm observed.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows brecciated basaltic eucrite clasts, also fragmental to cataclastic fine-grained domains, numerous shock melt veins up to 500 μm wide. Many pyroxenes show exsolution lamellae. Accessory troilite, chromite, ilmenite, and silica.

Geochemistry: (C. Agee and N. Muttik, UNM) Low-Ca pyroxene Fs_60.6±1.4Wo_3.4±1.2, Fe/Mn=32±1, n=17; augite Fs_31.4±5.1Wo_38.2±5.7, Fe/Mn=32±2, n=10; plagioclase An_89.3±1.8Ab_10.0±1.6Or_0.8±0.5, n=8. Shock melt veins SiO₂=47.14±0.19, CaO/Al₂O₃=0.62±0.02 (wt%), Mg#=37.5±1.2, Fe/Mn=34±2, n=8.

Classification: Achondrite (monomict eucrite).

Specimens: 21.2 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2013
Mass (g):	1495.7
Pieces:	3
Class:	Eucrite-mmict
Ferrosilite (mol%):	60.6±1.4, 31.4±5.
Wollastonite (mol%):	3.4±1.2, 38.2±5.7
Classifier:	C. Agee, UNM
Type spec mass (g):	21.2
Type spec location:	UNM
Main mass:	Sean Tutorow
Comments:	Field name G512; submitted by C. Agee, UNM

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

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 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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