Meteoritical Bulletin: Entry for Northwest Africa 1841

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Northwest Africa 1841

Basic information

Name: Northwest Africa 1841
This is an OFFICIAL meteorite name.
Abbreviation: NWA 1841
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass: 32.3 g

Classification
history:

Meteoritical Bulletin:	MB 89	(2005)	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 online:

Northwest Africa 1841

Morocco

Found 2003

Achondrite (ureilite)

A 39.3 g, complete and fully crusted stone was purchased in Rissani, Morocco, 2003 June. Description and classification (J. Wittke and T. Bunch, NAU): typical ureilite with prominent development of carbonaceous/reduced material along internal fractures and (001) planes of olivine, in addition to typical interstitial areas. Olivine cores, Fa_21.8 (Cr₂O₃ = 0.78 wt %, rims, Fa_{8.2 – 0.8} (Cr₂O₃ = 0.80 wt. %); pigeonite, Fs_18.3Wo₈; olivine metal inclusions, Ni = 0.92 wt %; interstitial metal, Ni = 4.45 wt. %, Si = 0.57 wt. %. Shock level, S2; low degree of weathering. Specimens: type specimen 8.4 g, NAU; main mass, Oakes.

Data from:
  MB89
  Table 7
  Line 30:

Place of purchase:	Morocco
Date:	2003
Mass (g):	32.3
Pieces:	1
Class:	Ure
Weathering grade:	W1
Fayalite (mol%):	0.8-21.8
Ferrosilite (mol%):	18.3
Classifier:
Type spec mass (g):	8.4

Institutions
and collections

NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)

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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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