Meteoritical Bulletin: Entry for Northwest Africa 10987

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Northwest Africa 10987

Basic information

Name: Northwest Africa 10987
This is an OFFICIAL meteorite name.
Abbreviation: NWA 10987
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass: 480 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Eucrite-br
Recommended:			Eucrite-br [explanation]

This is 1 of 237 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 17 Dec 2016

Writeup

Writeup from MB 105:

Northwest Africa 10987 (NWA 10987)

(Northwest Africa)

Purchased: 2015

Classification: HED achondrite (Eucrite, brecciated)

History: The meteorite was bought in 2015 from a Moroccan meteorite dealer via internet.

Physical characteristics: The individual lacks any fusion crust and shows a brownish interior.

Petrography: The meteorite is a coarse-grained breccia dominantly composed of up to 1-cm sized lithic and mineral clasts set into a fine-grained clastic matrix. Calcic plagioclase and exsolved pyroxenes are the most abundant mineral phases and are up to 1.5 mm in size. Minor phases are FeS, chromite, silica and metallic iron.

Geochemistry: low-Ca pyroxene: Fs_57.9±1.0Wo_5.1±1.3(Fs_55.9-59.3Wo_3.1-7.3, n=19, FeO/MnO=29-31); Ca-pyroxene: Fs_27.8±1.3Wo_43.2±1.3(Fs_26.1-32.3Wo_38.1-44.5, n=24, FeO/MnO=27-35); calcic plagioclase: An_90.0±1.3(An_87.3-91.9, n=23).

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Internet
Date:	P 2015
Mass (g):	480
Pieces:	1
Class:	Eucrite-br
Shock stage:	low
Weathering grade:	moderate
Ferrosilite (mol%):	57.9; 27.8
Wollastonite (mol%):	5.1; 43.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	39.4
Type spec location:	MNB (19.4 g) and UWB (20 g)
Main mass:	Pawel Zareba
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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