Meteoritical Bulletin: Entry for Northwest Africa 12575

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Northwest Africa 12575

Basic information

Name: Northwest Africa 12575
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12575
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 119 g

Classification
history:

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

This is 1 of 2884 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 12575 (NWA 12575)

(Northwest Africa)

Purchased: July 2016

Classification: Ordinary chondrite (LL6)

Petrography: Chondrules poorly defined. Feldspar grains mostly 30-90 μm.

Geochemistry: Oxygen isotopic composition measured by R. C. Greenwood (OU): δ¹⁷O = 4.029, δ¹⁸O = 5.479, Δ¹⁷O = 1.180 (all per mil).

Data from:
  MB108
  Table 0
  Line 0:

State/Prov/County:	North West Africa
Place of purchase:	Morocco
Date:	P July 2016
Mass (g):	119
Pieces:	1
Class:	LL6
Weathering grade:	W1
Fayalite (mol%):	31.7±0.5 (N=50)
Ferrosilite (mol%):	25.5±0.6 (N=34)
Wollastonite (mol%):	3.6±0.7 (N=34)
Classifier:	N.V. Almeida, NHM, and 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 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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