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Northwest Africa 15983
Basic information Name: Northwest Africa 15983
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15983
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 327 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  H5
Recommended:  H5    [explanation]

This is 1 of 11988 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 10 Jun 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15983 (NWA 15983)

(Northwest Africa)

Purchased: December 2021

Classification: Ordinary chondrite (H5)

History: Purchased by Jason Whitcomb in December 2021 from a meteorite dealer in Morocco.

Physical characteristics: Single stone with slightly weathered dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is an equilibrated ordinary chondrite containing secondary recrystallized feldspar (Av. ~12 μm) and accessory Fe-Ni metal, troilite, and chromite.

Geochemistry: Olivine (Fa18.4±0.4, range Fa17.8-19.6, n=43), Low-Ca Pyroxene (Fs16.1±0.5Wo1.4±0.7, range Fs14.1-16.9Wo0.9-3.3, n=36).

Classification: Ordinary chondrite (H5).

Specimens: 20.5 g at Cascadia, main mass with Jason Whitcomb.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P December 2021
Mass (g):327
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):18.4±0.4
Ferrosilite (mol%):16.1±0.5
Wollastonite (mol%):1.4±0.7
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.5
Type spec location:Cascadia
Main mass:Whitcomb Meteorite Collection
Comments:CML 1566; JW-137; submitted by Daniel Sheikh
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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