Meteoritical Bulletin: Entry for Northwest Africa 12576

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Northwest Africa 12576

Basic information

Name: Northwest Africa 12576
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12576
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 266 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	LL6
Recommended:			LL6 [explanation]

This is 1 of 2960 approved meteorites (plus 2 unapproved names) classified as LL6. [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 12 Apr 2019

Writeup

Writeup from MB 108:

Northwest Africa 12576 (NWA 12576)

(Northwest Africa)

Purchased: November 2016

Classification: Ordinary chondrite (LL6)

Petrography: Chondrules poorly defined. Feldspar grains mostly 30-100 µm.

Geochemistry: Oxygen isotopic composition measured by R. Greenwood (OU): δ¹⁷O = 4.275, δ¹⁸O = 6.039, Δ¹⁷O = 1.135 (all per mil).

Data from:
  MB108
  Table 0
  Line 0:

State/Prov/County:	North West Africa
Place of purchase:	Morocco
Date:	P November 2016
Mass (g):	266
Pieces:	1
Class:	LL6
Weathering grade:	W3
Fayalite (mol%):	31.7±0.3 (N=37)
Ferrosilite (mol%):	25.7±0.5 (N=51)
Wollastonite (mol%):	1.6±0.3 (N=51)
Classifier:	E. Bonato, N.V. Almeida, NHM; R.C. Greenwood, OU
Type spec mass (g):	20
Type spec location:	NHM
Main mass:	Jasper Spencer
Comments:	Submitted by N. V. Almeida

Plots:

O isotopes:

Institutions
and collections

NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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