Meteoritical Bulletin: Entry for Northwest Africa 12703

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Northwest Africa 12703

Basic information

Name: Northwest Africa 12703
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12703
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 50.3 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Eucrite-mmict
Recommended:			Eucrite-mmict [explanation]

This is 1 of 293 approved meteorites classified as Eucrite-mmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 18 Aug 2019

Writeup

Writeup from MB 108:

Northwest Africa 12703 (NWA 12703)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite, monomict)

History: The meteorite was purchased from a local meteorite dealer in Zagora, Morocco.

Physical characteristics: Single stone with some fusion crust.

Petrography: The meteorite is a breccia composed of rare black impact melt clasts set into a basaltic matrix dominated by exsolved pyroxene and often lath shaped calcic plagioclase with grain sizes of about 300 μm. Minor phases include silica, chromite, FeS, ilmenite, fayalite, and metallic Fe.

Geochemistry: low-Ca pyroxene: Fs_64.5±0.7Wo_2.1±0.6(Fs_63.4-65.6Wo_1.5-3.5, n=13, FeO/MnO=29-32); Ca-pyroxene: Fs_36.7±1.3Wo_36.5±1.4(Fs_34.3-39.1Wo_34.2-38.6, n=13, FeO/MnO=29-35); calcic plagioclase: An_83.6±2.4(An_78.9-87.3, n=16)

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Zagora, Morocco
Date:	P 2019
Mass (g):	50.3
Pieces:	1
Class:	Eucrite-mmict
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	64.5; 36.7
Wollastonite (mol%):	2.1; 36.5
Classifier:	A. Greshake, MNB
Type spec mass (g):	10.6
Type spec location:	MNB
Main mass:	Fabien Kuntz
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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