Meteoritical Bulletin: Entry for Northwest Africa 5374

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Northwest Africa 5374

Basic information

Name: Northwest Africa 5374
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5374
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 29.5 g

Classification
history:

Recommended:

Eucrite-pmict [explanation]

This is 1 of 379 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 19 Feb 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 5374 (NWA 5374)

(Northwest Africa)

Purchased: 2008

Classification: HED achondrite (Eucrite, polymict)

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

Physical characteristics: Grayish rock almost completely covered with fusion crust.

Petrography: The meteorite is a polymict breccia composed of up to 700 µm sized basaltic and small black impact melt clasts in a clastic matrix containing a great diversity of minerals fragments. Predominant minerals are exsolved pyroxene, compositionally zoned pigeonite, diogenetic low-Ca pyroxene (<10 vol%; up to 600 µm sized), and calcic plagioclase. Accessories include silica, chromite, ilmenite, and FeS. No metallic iron detected.

Geochemistry: low-Ca pyroxene host to exsolution lamellae: Fs_61.2±0.5Wo_2.2±0.6(Fs_60.7-61.9Wo_1.5-2.8, FeO/MnO=30-32, n=7); augite exsolution lamellae: Fs_27.2±0.8Wo_41.7±0.8(Fs_26.4-29.1Wo_40.0-42.4, FeO/MnO=29-32, n=7); diogenetic low-Ca pyroxene: Fs_29.0±0.2Wo_4.1±0.6(Fs_28.4-29.1Wo_3.8-5.5, FeO/MnO=26-30, n=7); zoned pigeonite: Fs_44.9±12.0Wo_6.2±0.7(Fs_32.5-61.1Wo_5.5-7.7, FeO/MnO=27-35, n=7); calcic plagioclase: An_92.2±1.9(An_88.2-94.0, n=7)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Midelt, Morocco
Date:	P 2008
Mass (g):	29.5
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	61.2; 27.2; 29.0; 44.9
Wollastonite (mol%):	2.2; 41.7; 4.1; 6.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	6
Type spec location:	MNB
Main mass:	Stefan Ralew
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 111, in preparation (2022)

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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