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Northwest Africa 14773
Basic information Name: Northwest Africa 14773
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14773
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 264 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  H4
Recommended:  H4    [explanation]

This is 1 of 6493 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 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14773 (NWA 14773)

(Northwest Africa)

Purchased: 2021 Jun

Classification: Ordinary chondrite (H4)

History: Purchased by Jason Whitcomb in June 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Extensively weathered specimen. Almost all primary metal has been altered to Fe hydroxides leaving only tiny remnants of fresh taenite and kamacite. Well-formed equilibrated chondrules containing either devitrified glass or in some cases plagioclase are evident. Troilite and chromite are present in the relatively coarse grained matrix, but no phosphates or augite were identified. The extensive weathering makes it impossible to ascertain whether fine grained plagioclase occurs in the matrix.

Geochemistry: Olivine (Fa19.0±0.2, range Fa18.7-19.2, N = 7), low-Ca pyroxene (Fs16.5±0.1Wo1.4±0.1, range Fs16.4-16.7Wo1.2-1.5, N = 7).

Classification: Ordinary chondrite (H4). Petrologic type 4 is inferred for this specimen based on the well-defined spherical form of the chondrules, their abundance and the presence within them of devitrified glass.

Specimens: 21.85 g including one polished thick section at PSF; remainder with Mr. J. Whitcomb.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Jun
Mass (g):264
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W4
Fayalite (mol%):19.0±0.2
Ferrosilite (mol%):16.5±0.1
Wollastonite (mol%):1.4±0.1
Classifier:(A. Irving, UWS and J. Boesenberg, BrownU)
Type spec mass (g):21.85
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-42; 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)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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