Meteoritical Bulletin: Entry for Northwest Africa 12927

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Northwest Africa 12927

Basic information

Name: Northwest Africa 12927
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12927
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 3.8 kg

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 518 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 21 Nov 2019

Writeup

Writeup from MB 108:

Northwest Africa 12927 (NWA 12927)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Diogenite)

History: Purchased Nov 2016 by Dustin Dickens in Mauritania from anonymous dealer.

Physical characteristics: Single stone with desert weathered exterior. Saw cut and broken surfaces reveal relatively coarse grained texture of dark brown grains set in a yellow-brown groundmass.

Petrography: (C. Agee, UNM) This meteorite is an equilibrated orthopyroxenite with ~95% pyroxene, and minor amounts of augite, chromite and iron-oxide. No olivine or plagioclase were detected.

Geochemistry: (C. Agee, UNM) Low-Ca pyroxene Fs_27.3±0.6Wo_3.6±1.0, Fe/Mn=27±0, n=5.

Classification: Diogenite

Specimens: 22 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P 2016
Mass (g):	3800
Pieces:	1
Class:	Diogenite
Shock stage:	moderate
Weathering grade:	moderate
Ferrosilite (mol%):	27.3±0.6
Wollastonite (mol%):	3.6±1.0
Classifier:	C. Agee, UNM
Type spec mass (g):	22
Type spec location:	UNM
Main mass:	Dustin Dickens
Comments:	Field name DD-52; 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
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Photos:

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

Geography:

Coordinates:

Unknown.

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

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