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Northwest Africa 12451
Basic information Name: Northwest Africa 12451
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12451
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 19.1 g
Classification
  history:
Recommended:  H4    [explanation]

This is 1 of 5778 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 27 Mar 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12451 (NWA 12451)

(Northwest Africa)

Purchased: 2005

Classification: Ordinary chondrite (H4)

History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by the Hollis Collection and then donated to PSF.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed relatively small chondrules are set in a relatively coarse grained matrix containing abundant altered metal.

Geochemistry: Olivine (Fa19.2-19.4, N = 3), orthopyroxene (Fs11.1-18.1Wo3.4-2.4, N = 2), clinopyroxene (Fs4.4-9.4Wo45.8-43.4, N = 2).

Classification: Ordinary chondrite (H4).

Specimens: The entire specimen including one polished thin section is at PSF.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):19.1
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):19.2-19.4
Ferrosilite (mol%):11.1-18.1
Wollastonite (mol%):3.4-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):19.1
Type spec location:PSF
Main mass:PSF
Comments:Work name CHC18038; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 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 6916 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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