Meteoritical Bulletin: Entry for Northwest Africa 6009

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Northwest Africa 6009

Basic information

Name: Northwest Africa 6009
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6009
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 75 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	CK5
Recommended:			CK5 [explanation]

This is 1 of 217 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 18 Feb 2017

Writeup

Writeup from MB 106:

Northwest Africa 6009 (NWA 6009)

(Northwest Africa)

Purchased: 2009 Oct

Classification: Carbonaceous chondrite (CK5)

Petrography: (K. Metzler, IfP) Chondrules and CAIs are embedded in a fine-grained brownish matrix. The matrix consists mostly of equilibrated Fe-rich olivine grains, interspersed with opaque nodules of Cr-bearing magnetite. The mean grain size of secondary feldspar is around 10µm.

Geochemistry: Random measurements of olivine grains revealed Fa_32.3±0.5(Fa_31-33); n=20. The mean Ni content in olivine is 0.38 wt%. Random measurements of low-Ca pyroxene grains revealed Fs_27.2±1.2Wo_1.0±0.6(Fs_25-30Wo_1-3; n=19). One measurement of Ca-pyroxene shows En₄₇Fs₁₀Wo_43.The compositional range of feldspar is An_34-65(n=5).

Classification: CK chondrite based on mineral chemistry. Petrologic type 5 based on the equilibrated state of olivine and pyroxene and the fact that chondrules are still visible.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2009 Oct
Mass (g):	75
Pieces:	1
Class:	CK5
Shock stage:	S3
Weathering grade:	moderate
Fayalite (mol%):	32.3±0.5
Ferrosilite (mol%):	27.2±1.2
Wollastonite (mol%):	1.0±0.6
Classifier:	K. Metzler, IfP
Type spec mass (g):	16
Type spec location:	IfP
Main mass:	Mirko Graul, Bernau, Germany
Comments:	Purchased from a mineral dealer in Erfoud, Morocco; submitted by K. Metzler (IfP)

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Geography:

Coordinates:

Unknown.

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

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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