Meteoritical Bulletin: Entry for Northwest Africa 1670

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Northwest Africa 1670

Basic information

Name: Northwest Africa 1670
This is an OFFICIAL meteorite name.
Abbreviation: NWA 1670
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass: 29 g

Classification
history:

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

This is 1 of 54 approved meteorites classified as Angrite. [show all]
Search for other: Achondrites, Angrites

Writeup

Writeup from MB 88:

Northwest Africa 1670

Morocco

Purchased 2001 January

Achondrite (angrite)

A single stone of 29 g mostly covered by fusion crust with mm-sized pores was purchased in Morocco by B. Fectay (Fectay). Classification and mineralogy (A. Jambon and O. Boudouma, UPVI, and J.-A. Barrat, UAng): Phenocrysts of fassaitic pyroxenes and olivine in a finely crystallized matrix. Large zoned olivine xenocrysts (several mm in size) with overgrown tooth-shaped rims (mg# = 0.92 to 0.85-0.55). Core to rims of pyroxene phenocrysts range from mg# 0.68 to 0.60 with FeO/MnO = 76. Matrix contains olivine, pyroxene, kirschsteinite, mg# = 0.13-0.03, anorthite, An_98-100, and accessory pyrrhotite, apatite, rhönite, Cr-spinel, ulvöspinel and metal. . Oxygen isotopes (R. Greenwood and I. Franchi, OU): δ¹⁸O = 3.887‰, δ¹⁷O = 1.967‰, Δ¹⁷O = -0.055‰. Specimens: type specimen, 5.8 g, ENSL; main mass, Fectay.

Data from:
  MB88
  Table 4
  Line 18:

Origin or pseudonym:	Attamina
Place of purchase:	Erfoud
Date:	P Jan 2003
Mass (g):	29
Pieces:	1
Class:	Angr
Classifier:	A. Jambon and O. Boudouma, UPVI and J.-A. Barrat, UAng
Type spec mass (g):	5.8
Type spec location:	ENSL
Main mass:	Fectay

Plots:

O isotopes:

Institutions
and collections

ENSL: Ecole Normale Supérieure de Lyon, Laboratoire de Sciences de la Terre, 46 allée d'Italie 69364 Lyon Cedex, France (institutional address; updated 27 Feb 2011)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
Fectay: Bruno Fectay and Carine Bidaut, La Memoire de la Terre SARL, 39800 Aumont, France; Website (private address)
UAng: Université d'Angers, Faculté des Sciences, 2 bd Lavoisier, 49045 Angers Cedex, France (institutional address)

Catalogs:

References:

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

Find references in NASA ADS:
Find references in Google Scholar:

Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Don Edwards

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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