Meteoritical Bulletin: Entry for Northwest Africa 6000

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Northwest Africa 6000

Basic information

Name: Northwest Africa 6000
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6000
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 308 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Howardite
Recommended:			Howardite [explanation]

This is 1 of 446 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 17 Dec 2016

Writeup

Writeup from MB 105:

Northwest Africa 6000 (NWA 6000)

(Northwest Africa)

Purchased: 2009 Aug

Classification: HED achondrite (Howardite)

History: Purchased from a mineral dealer in Erfoud, Morocco

Petrography: (K. Metzler, IfP) Fine-grained breccia, consisting of mm-sized clasts of equilibrated and unequilibrated basalt (subophitic and ophitic texture) and diogenitic pyroxene, set in a fine-grained matrix of related debris. The diogenite component is unevenly distributed (mean concentration about 15 vol%). Main accessories are ilmenite, chromite, and (mostly oxidized) metal.

Geochemistry: Eucritic lithologies: low-Ca pyroxene Fs_44.7±13.0(34-62; n=6); augite exsolution lamellae Fs_27.1(Fs_26-28; n=2). Diogenitic pyroxene Fs_25.9±3.0(Fs_22-31; n=7). Plagioclase variation An_90.2±3.3(An_82.5-94.7; n=13)

Data from:
  MB105
  Table 0
  Line 0:

Place of purchase:	Erfoud
Date:	P 2009 Aug
Mass (g):	308
Pieces:	1
Class:	Howardite
Shock stage:	moderate
Weathering grade:	moderate
Ferrosilite (mol%):	25.9; 44.7; 27.1
Wollastonite (mol%):	3.0; 2.7; 42.6
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	Mirko Graul, Bernau, Germany
Comments:	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 Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Mirko Graul

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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