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Northwest Africa 13447
Basic information Name: Northwest Africa 13447
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13447
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 269 g
Classification
  history:
Recommended:  H3    [explanation]

This is 1 of 620 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 10 Oct 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13447 (NWA 13447)

(Northwest Africa)

Purchased: 2020 Mar

Classification: Ordinary chondrite (H3)

History: Purchased by John Divelbiss in March 2020 from Matthew Stream, who had acquired the specimen from a Moroccan dealer at the 2020 Tucson Gem and Mineral Show.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fairly closely-packed, well-formed unequilibrated chondrules (apparent diameter 700±490 µm, N = 23) are set in a recrystallized matrix containing altered kamacite, taenite (some Cu-bearing), troilite, silica polymorph and chlorapatite.

Geochemistry: Olivine (Fa14.0±6.5, range Fa0.6-18.2, N = 8; Cr2O3 in ferroan examples <0.04 wt.%), low-Ca pyroxene (Fs13.2±3.6Wo1.8±1.9, range Fs8.7-17.3Wo0.3-4.7, N = 5), augite (Fs6.6±2.5Wo40.1±2.8, range Fs4.8-8.4Wo38.1-42.0, N = 2).

Classification: Ordinary chondrite (H3).

Specimens: 26.8 g including one polished thin section at UWB; remainder with Mr. J. Divelbiss.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Riverside, CA
Date:P 2020 Mar
Mass (g):269
Pieces:1
Class:H3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):14.0±6.5
Ferrosilite (mol%):13.2±3.6
Wollastonite (mol%):1.8±1.9
Magnetic suscept.:5.21
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):26.8
Type spec location:UWB
Main mass:J. Divelbiss
Comments:Work name JD20-5; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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