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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:
Recommended:  H5    [explanation]

This is 1 of 11372 approved meteorites (plus 22 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 Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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