Meteoritical Bulletin: Entry for Northwest Africa 15356

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Northwest Africa 15356

Basic information

Name: Northwest Africa 15356
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15356
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 260 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 22 Oct 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 15356 (NWA 15356)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite)

History: Purchased from Craig Zlimen in 2021 from an Algerian meteorite dealer.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Specimen displays a brecciated texture and is comprised primarily of mm-sized lithic fragments and isolated sub-angular elongate/equant plagioclase and clinopyroxene grains (Av. ~0.3 mm, up to ~0.5 mm) set within a finer-grained groundmass rich in pigeonite. Accessory phases include Cr-spinel, ilmenite, SiO₂-rich glass, and troilite.

Geochemistry: Pigeonite (Fs_49.9±4.0Wo_12.6±3.3, range Fs_45.7-64.1Wo_6.1-24.5, Fe/Mn=29±2, n=30), High-Ca Pyroxene (Fs_47.3±31.9Wo_34.8±11.6, range Fs_24.7-69.9Wo_26.6-43.1, Fe/Mn=34±4, n=2), Calcic Plagioclase (An_90.6±0.5, range An_89.0-91.3, n=20).

Classification: HED Achondrite (Eucrite).

Specimens: 20.65 grams at Cascadia, main mass with Craig Zlimen.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021
Mass (g):	260
Pieces:	1
Class:	Eucrite
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	49.9±4.0, 47.3±31.9
Wollastonite (mol%):	12.6±3.3, 34.8±11.6
Classifier:	D. Sheikh, Cascadia
Type spec mass (g):	20.65
Type spec location:	Cascadia
Main mass:	Craig Zlimen
Comments:	CML 1529; 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., 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. ?

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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