Meteoritical Bulletin: Entry for Northwest Africa 1913

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Northwest Africa 1913

Basic information

Name: Northwest Africa 1913
This is an OFFICIAL meteorite name.
Abbreviation: NWA 1913
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass: 731 g

Classification
history:

Meteoritical Bulletin:	MB 88	(2004)	Ureilite
MetBase:	v. 7.1	(2006)	Ureilite
Recommended:			Ureilite [explanation]

This is 1 of 630 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Writeup

Writeup from MB 88:

Northwest Africa 1913

Morocco

Found 2001

Achondrite (ureilite)

A 731 g complete and partially crusted stone was purchased in Erfoud in 2002. Classification and mineralogy (T. Bunch and J. Wittke, NAU): typical ureilite texture with preferred orientation of elongated silicates. Mineral modes: olivine 68 vol%, and pigeonite 32 vol%. Olivine cores, Fa_19.2-19.6and reduced rims, Fa_1.5-3.0. Pigeonite, mostly Fs₁₇Wo₁₁. Metal along grain boundaries is 9.3 wt% Ni; and metal together with pyrrhotite as inclusions in pigeonite, is 3.6 wt% Ni, Carbonaceous matter is present at grain boundaries, there is no evidence of diamonds. Shock level, S1; weathering grade, W2. Specimens: type specimen, 21.2 g, NAU; main mass, Boswell.

Data from:
  MB88
  Table 4
  Line 80:

Place of purchase:	Erfoud
Date:	P 2002
Mass (g):	731
Pieces:	1
Class:	Ure
Classifier:	T. Bunch and J. Wittke, NAU
Type spec mass (g):	21.2
Type spec location:	ASU
Main mass:	Boswell

Institutions
and collections

ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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