Meteoritical Bulletin: Entry for Northwest Africa 12985

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Northwest Africa 12985

Basic information

Name: Northwest Africa 12985
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12985
Observed fall: No
Year found: 2016
Country: Algeria
Mass: 33 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 23 Dec 2019

Writeup

Writeup from MB 108:

Northwest Africa 12985 (NWA 12985)

Algeria

Find: 2016

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased in 2019 by Matthew Stream from a seller in Algeria.

Physical characteristics: Single stone with absent fusion crust. A slice of the interior reveals an assortment of light and dark-colored clasts.

Petrography: (Daniel Sheikh, FSU) Sample is a feldspathic fragmental breccia composed predominantly of angular anorthitic clasts (<2mm) containing minor amounts of olivine, pigeonite, augite, ilmenite, and chromite.

Geochemistry: (Daniel Sheikh, FSU) Olivine (Fa_29.4±10.4, range Fa_18.7-44.6, Fe/Mn=89±10, n=3), pigeonite (Fs_36.5±7.6Wo_14.1±4.0, range Fs_31.8-50.2Wo_10.7-20.9, Fe/Mn=51±7, n=5), wugite (Fs_11.7Wo_42.0, Fe/Mn=38, n=1), anorthite (An_96.4±1.1, range An_93.8-98.4, n=33).

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 6.7 grams at UCLA; main mass with Matthew Stream.

Data from:
  MB108
  Table 0
  Line 0:

Date:	2016
Mass (g):	33
Pieces:	1
Class:	Lunar (feldsp. breccia)
Shock stage:	moderate
Weathering grade:	low
Fayalite (mol%):	29.4±10.4
Ferrosilite (mol%):	36.5±7.6, 11.7
Wollastonite (mol%):	14.1±4.0, 42.0
Classifier:	D. Sheikh, FSU
Type spec mass (g):	6.7
Type spec location:	UCLA
Main mass:	Matthew Stream
Comments:	Submitted by Daniel Sheikh

Institutions
and collections

UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)

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
Public domain photographs:
Daniel Sheikh

Geography:

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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