Meteoritical Bulletin: Entry for Northwest Africa 5378

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Northwest Africa 5378

Basic information

Name: Northwest Africa 5378
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5378
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 87 g

Classification
history:

Recommended:

CK5 [explanation]

This is 1 of 201 approved meteorites classified as CK5. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 19 Mar 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 5378 (NWA 5378)

(Northwest Africa)

Purchased: 2008

Classification: Carbonaceous chondrite (CK5)

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

Physical characteristics: Dark grayish rock mostly covered with fusion crust.

Petrography: The meteorite displays a dark grayish interior and consists of large, partly flattened and well separated chondrules (apparent mean diameter about 700 µm, up to 2 mm) set in abundant recrystallized matrix predominantly composed of ferroan Ni-bearing olivine. Minor phases are low-Ca pyroxene, Ca-pyroxene, nests of intermediate plagioclase, and FeS. Cr-rich magnetite is abundant; no metal detected. Some chondrules show brownish staining due to terrestrial alteration.

Geochemistry: olivine: Fa_28.7±0.2(Fa_28.4-28.9, FeO/MnO=116±12; NiO=0.37±0.07 wt%, n=7); low-Ca pyroxene: Fs_25.9±0.8Wo_0.6±0.2(Fs_24.9-27.1Wo_0.5-1.0, n=7); Ca-pyroxene: Fs_10.0±1.3Wo_43.7±3.3(Fs_8.9-12.4Wo_37.3-46.1, n=5); feldspar: An_25.2-62.6Ab_36.7-71.3Or_0.7-3.6, n=6; magnetite contains 4.0±0.1 wt% Cr₂O₃, n=4

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2008
Mass (g):	87
Pieces:	1
Class:	CK5
Shock stage:	S2
Weathering grade:	moderate
Fayalite (mol%):	28.7
Ferrosilite (mol%):	25.9; 10.0
Wollastonite (mol%):	0.6; 43.7
Classifier:	A. Greshake, MNB
Type spec mass (g):	17.4
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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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