Meteoritical Bulletin: Entry for Northwest Africa 5263

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Northwest Africa 5263

Basic information

Name: Northwest Africa 5263
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5263
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass: 520 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	R3-6
Recommended:			R3-6 [explanation]

This is 1 of 34 approved meteorites classified as R3-6. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)

Comments:

Approved 19 Mar 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 5263 (NWA 5263)

(Northwest Africa)

Purchased: 2005

Classification: Rumuruti chondrite (R3-6)

History: The meteorite was purchased from a Morrocan meteorite dealer on the meteorite fair in Ensisheim, France.

Physical characteristics: Three brownish fragments without fusion crust.

Petrography: The meteorite displays a brownish to orange interior and is composed of up to 1 cm sized type 6 and black impact melt clasts set in type 3 matrix. Fe-rich olivine is the predominant mineral phase in the type 6 clasts. In the matrix, olivine and low-Ca pyroxene are mostly compositionally unequilibrated. Chondrules have an average diameter of about 450 μm. More minor phases include low-Ca pyroxene, Ca-pyroxene, sodic plagioclase, sulfides, and chromite; no metal has been detected.

Geochemistry: type 3 lithology: olivine: Fa_25.5±11.1(Fa_14.1-43.5, n=24); low-Ca pyroxene: Fs_12.1±7.7Wo_0.8±0.8(Fs_1.0-27.3Wo_0.2-2.7, n=19); type 6 lithology: olivine: Fa_37.4±0.3(Fa_36.9-37.8, n=12); Ca-pyroxene: Fs_11.7±0.6Wo_40.2±1.9(Fs_10.9-12.7Wo_35.9-42.9, n=8); feldspar: An_9.8-13.0Ab_85.2-89.4Or_0.5-1.8, n=6

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Ensisheim, France
Date:	P 2005
Mass (g):	520
Pieces:	3
Class:	R3-6
Shock stage:	S4
Weathering grade:	W3
Fayalite (mol%):	25.5; 37.4
Ferrosilite (mol%):	12.1; 11.7
Wollastonite (mol%):	0.8; 40.2
Classifier:	A. Greshake, MNB
Type spec mass (g):	23
Type spec location:	MNB
Main mass:	Christian Anger
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Anger: Christian Anger, Korngasse 6, 2405 Bad Deutsch-Altenburg, Austria; Website (private address)

Catalogs:

References:

Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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