Meteoritical Bulletin: Entry for Northwest Africa 6560

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Northwest Africa 6560

Basic information

Name: Northwest Africa 6560
This is an OFFICIAL meteorite name.
Abbreviation: NWA 6560
Observed fall: No
Year found: 2010
Country: Morocco
Mass: 5.89 kg

Classification
history:

Meteoritical Bulletin:	MB 100	(2012)	Howardite
Recommended:			Howardite [explanation]

This is 1 of 436 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 3 Oct 2011

Writeup

Writeup from MB 100:

Northwest Africa 6560 (NWA 6560)

Morocco

Found: 2010

Classification: HED achondrite (Howardite)

History: A. Aaronson purchased 10 stones with a total mass of 5888 g in Erfoud, Morocco, in 2010-2011.

Physical characteristics: Fresh with flow oriented fusion crust. Complete stones range in size from 36 to 1600 g.

Petrography: Fine to medium clast size (<1 mm to 4 mm) of diogenite pyroxenes and clasts, and eucrites; clast modes (vol %): diogenites 74, eucrites 24, chromite and metal 2. Shock level, S2-S4, variable shock levels in clasts. Weathering grade, W0/1.

Geochemistry: Diogenite orthopyroxene Fs_23.6-36.8Wo_1.8-2.3(FeO/MnO=30); chromite Cr# 80-89. Eucrite orthopyroxene Fs_64.2Wo_3.2; pigeonite Fs_53.7Wo_12.2; plagioclase An_89-95.4.

Classification: Achondrite (howardite)

Specimens: 24.4 g on deposit at NAU. Aaronson holds the main mass.

Data from:
  MB100
  Table 1
  Line 1418:

Place of purchase:	Erfoud
Date:	2010
Mass (g):	5888
Pieces:	10
Class:	Howardite
Shock stage:	S3-4
Weathering grade:	low
Ferrosilite (mol%):	64.2; 23.6-36.8
Wollastonite (mol%):	3.2; 2.3
Classifier:	Bunch/Wittke
Type spec mass (g):	20.2
Type spec location:	NAU
Main mass:	Aaronson
Comments:	Submitted by Bunch

Institutions
and collections

NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Anna Morris
Dominik Stoeckli
Michael S. Scherman

Geography:

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 1967 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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