Meteoritical Bulletin: Entry for Northwest Africa 5670

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Northwest Africa 5670

Basic information

Name: Northwest Africa 5670
This is an OFFICIAL meteorite name.
Abbreviation: NWA 5670
Observed fall: No
Year found: 2008
Country: (Northwest Africa)
Mass: 179 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	R5-6
Recommended:			R5-6 [explanation]

This is 1 of 2 approved meteorites classified as R5-6. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)

Comments:

Approved 20 Dec 2021

Writeup

Writeup from MB 110:

Northwest Africa 5670 (NWA 5670)

(Northwest Africa)

Purchased: 2008

Classification: Rumuruti chondrite (R5-6)

History: The meteorite was purchased from a meteorite dealer on a mineral fair in Berlin, Germany.

Physical characteristics: Brownish rock without fusion crust.

Petrography: The meteorite shows a light orange interior and is a breccia composed of up to 1.7 cm sized type 6 and black melt rock clasts in abundant type 5 host lithology that contains some weakly delineated chondrules. Ferroan olivine, Ca-pyroxene, and sodic plagioclase are the dominant mineral phases. Opaques are pentlandite, pyrrhotite and Ti-bearing chromite; metal is absent.

Geochemistry: olivine: Fa_37.7±0.2(Fa_37.4-37.9, FeO/MnO=77±5, n=12); low-Ca pyroxene: Fs_29.4±0.2Wo_1.8±0.2(Fs_29.0-29.9Wo_1.5-2.1, n=10); Ca-pyroxene: Fs_11.4±0.6Wo_44.7±0.7, (Fs_9.8-11.8Wo_44.1-46.5, n=10); feldspar: An_6.9-13.2Ab_82.7-87.3Or_2.9-5.8, n=10

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Berlin, Germany
Date:	P 2008
Mass (g):	179
Pieces:	1
Class:	R5-6
Shock stage:	moderate
Weathering grade:	low
Fayalite (mol%):	37.7
Ferrosilite (mol%):	29.4; 11.4
Wollastonite (mol%):	1.8; 44.7
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.4
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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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