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Northwest Africa 15532
Basic information Name: Northwest Africa 15532
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15532
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 4.95 kg
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 2 Jan 2023
Writeuphelp
Writeup from MB 111:

Northwest Africa 15532 (NWA 15532)

(Northwest Africa)

Purchased: 2021 Sep

Classification: Ordinary chondrite (H4)

History: Purchased by Darryl Pitt in September 2021 from a Moroccan dealer at the Denver Mineral Show.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Relatively small, well-formed equilibrated chondrules containing devitrified glass are set in a relatively coarse grained matrix containing altered kamacite, troilite, chromite, merrillite and chlorapatite, but no plagioclase.

Geochemistry: Olivine (Fa19.1±0.5, range Fa18.6-19.3, N = 6), low-Ca pyroxene (Fs16.9±1.0Wo1.4±1.6, range Fs16.0-17.3Wo0.3-4.9, N = 7).

Classification: Ordinary chondrite (H4).

Specimens: 47.6 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Denver
Date:P 2021 Sep
Mass (g):4949
Pieces:1
Class:H4
Shock stage:S2
Weathering grade:W2/3
Fayalite (mol%):19.1±0.5
Ferrosilite (mol%):16.9±0.1
Wollastonite (mol%):1.4±1.6
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):47.6
Type spec location:UWB
Main mass:DPitt
Comments:Work name MVCH 659; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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