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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:help 431 g
Classification
  history:
Recommended:  L3    [explanation]

This is 1 of 679 approved meteorites 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
Writeuphelp
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 Fa20.3±6.9 (Fa2.3-31.1; n=24); the mean low-Ca pyroxene composition is Fs13.8±6.3Wo0.9±0.9 (Fs2.5-19.7Wo0.1-3.8); 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, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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