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Northwest Africa 1458
Basic information Name: Northwest Africa 1458
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1458
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 275 g
Classification
  history:
Recommended:  H4    [explanation]

This is 1 of 6033 approved meteorites (plus 11 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 2 Aug 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 1458 (NWA 1458)

(Northwest Africa)

Purchased: 2002

Classification: Ordinary chondrite (H4)

History: Purchased by Adam and Greg Hupe in 2002 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and J. Boesenberg, Brown U) Well-formed, relatively small chondrules are set in a relatively coarse grained matrix containing altered metal, troilite, chromite and apatite.

Geochemistry: Olivine (Fa19.6±0.8, range Fa19.3-21.1, N = 5), low-Ca pyroxene (Fs17.3±0.9Wo1.5±0.1, range Fs16.3-17.3Wo1.2-1.6, N = 5).

Classification: Ordinary chondrite (H4).

Specimens: 20 g at UCLA; 1.7 g including one polished thin section at PSF; remainder with A. & G. Hupe.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2002
Mass (g):275
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):19.6±0.8
Ferrosilite (mol%):17.3±0.9
Wollastonite (mol%):1.5±0.1
Classifier:A. Irving, UWA and J. Boesenberg, BrownU
Type spec mass (g):21.7
Type spec location:20 g UCLA/1.7 g PSF
Main mass:A. & G. Hupe
Comments:Work name H110; 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)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 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)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
UWA: University of Western Australia, 35 Hackett Drive, Crawley, Western Australia 6009, Australia (institutional address; updated 29 May 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
David L. Ribeca   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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