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Northwest Africa 15933
Basic information Name: Northwest Africa 15933
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15933
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 472 g
Meteoritical Bulletin:  MB 112  (2024)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 108 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Jun 2023
Writeup from MB 112:

Northwest Africa 15933 (NWA 15933)

(Northwest Africa)

Purchased: March 2018

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased by Jasper Spencer from a meteorite dealer in Morroco in March 2018.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is comprised of sub-angular to sub-rounded, mm-sized basaltic clasts set within an opaque, melt rock matrix containing sparse vesicles. Accessory phases include SiO2-rich glass, troilite, Ti-bearing chromite, and ilmenite.

Geochemistry: Low-Ca Pyroxene (Fs59.8±1.6Wo3.1±1.2, range Fs56.3-62.5Wo1.6-5.5, Fe/Mn=29±3, n=29), Pigeonite (Fs56.1±2.0Wo8.4±2.7, range Fs52.8-57.8Wo6.0-12.8, Fe/Mn=31±4, n=5), High-Ca Pyroxene (Fs28.0±0.8Wo41.1±1.4, range Fs26.9-29.1Wo39.5-42.8, Fe/Mn=30±5, n=8), Calcic Plagioclase (An91.0±1.7, range An86.1-93.1, n=22).

Classification: HED Achondrite (Eucrite-melt breccia).

Specimens: 23.2 g at Cascadia, main mass with Emanuela Vanacore.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P March 2018
Mass (g):472
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):59.8±1.6, 56.1±2.0, 28.0±0.8
Wollastonite (mol%):3.1±1.2, 8.4±2.7, 41.1±1.4
Classifier:D. Sheikh, Cascadia
Type spec mass (g):23.2
Type spec location:Cascadia
Main mass:Emanuela Vanacore
Comments:CML 1551, Jasper sample C; submitted by Daniel Sheikh
   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)
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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     This is 1 of 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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