Meteoritical Bulletin: Entry for Northwest Africa 12976

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Northwest Africa 12976

Basic information

Name: Northwest Africa 12976
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12976
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 431 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	L3
Recommended:			L3 [explanation]

This is 1 of 848 approved meteorites (plus 2 unapproved names) classified as L3. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 2 Nov 2019

Writeup

Writeup from MB 108:

Northwest Africa 12976 (NWA 12976)

(Northwest Africa)

Purchased: 2019 Jul

Classification: Ordinary chondrite (L3)

Petrography: (K. Metzler, IfP) Ordinary chondrite of low petrologic type consisting of chondrules (up to 3.9 mm), chondrule fragments, Fe,Ni metal grains and troilite, with small amounts of fine-grained interchondrule matrix. The mean apparent chondrule size is 480 μm (n=59).

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa_20.3±6.9(Fa_2.3-31.1; n=24); the mean low-Ca pyroxene composition is Fs_13.8±6.3Wo_0.9±0.9(Fs_2.5-19.7Wo_0.1-3.8); n=15.

Classification: L chondrite based on metal content and apparent chondrule size. Petrologic type based on the chemical variation of olivine (PMD of Fa values: 34), estimated L3.6.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2019 Jul
Mass (g):	431
Pieces:	1
Class:	L3
Shock stage:	S3
Weathering grade:	W1-2
Fayalite (mol%):	20.3±6.9
Ferrosilite (mol%):	13.8±6.3
Wollastonite (mol%):	0.9±0.9
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	Mirko Graul, Bernau, Germany
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

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

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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