Meteoritical Bulletin: Entry for Northwest Africa 8321

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Northwest Africa 8321

Basic information

Name: Northwest Africa 8321
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8321
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 317 g

Classification
history:

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

This is 1 of 511 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 14 Mar 2014

Writeup

Writeup from MB 103:

Northwest Africa 8321 (NWA 8321)

(Northwest Africa)

Purchased: Dec 2013

Classification: HED achondrite (Diogenite)

Physical characteristics: The meteorite is partly covered by black fusion crust and shows a light yellowish interior.

Petrography: The achondrite displays a cumulate texture of dominantly large orthopyroxene crystals with less abundant calcic plagioclase. Accessory minerals include chromite and troilite.

Geochemistry: low-Ca pyroxene: Fs_21.3±0.6Wo_3.2±1.2(range Fs_20.2-22-2Wo_1.7-5.1, n=14), FeO/MnO: 25-29; clacic plagioclase: An_88±0.9(range An_86.6-89.5, n=15)

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P Dec 2013
Mass (g):	317
Pieces:	1
Class:	Diogenite
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	21.3±0.6 (range 20.2-22-2, n=14)
Wollastonite (mol%):	3.2±1.2 (range 1.7-5.1, n=14)
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.2
Type spec location:	MNB
Main mass:	ARTMET
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
ARTMET: Meteorites and Art, Poland (private address; updated 23 Feb 2018)

Catalogs:

References:

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

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Photos:

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

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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