Meteoritical Bulletin: Entry for Northwest Africa 15377

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Northwest Africa 15377

Basic information

Name: Northwest Africa 15377
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15377
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 209 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 344 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 12 Nov 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 15377 (NWA 15377)

(Northwest Africa)

Purchased: 2021

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Craig Zlimen from a meteorite dealer in Algeria in 2021.

Physical characteristics: Sample contains minor fusion crust.

Petrography: (D. Sheikh, Cascadia) Specimen is a polymict breccia comprised of mm-sized lithic and monomineralic clasts set within a dark, finer-grained fragmental matrix. Lithic clast lithologies identified include: anorthosites, troctolites, olivine norites, noritic anorthosites, and impact-melt-rich clasts. Accessory phases include ilmenite, spinel (some Cr-rich), SiO₂-rich glass, and chromite (some Ti-rich).

Geochemistry: Olivine (Fa_22.4±9.7, range Fa_10.9-44.4, Fe/Mn=84±12, n=30), Low-Ca Pyroxene (Fs_23.1±10.2Wo_3.6±0.8, range Fs_13.1-36.5Wo_2.1-4.5, Fe/Mn=50±6, n=9), Pigeonite (Fs_31.8±6.3Wo_8.9±3.6, range Fs_26.2-39.9Wo_5.6-14.7, Fe/Mn=51±4, n=5), High-Ca Pyroxene (Fs_17.4±10.8Wo_39.4±3.8, range Fs_7.2-35.1Wo_33.8-42.9, Fe/Mn=41±9, n=5), Calcic Plagioclase (An_96.0±0.7, range An_94.6-97.3, n=30).

Classification: Lunar (feldspathic fragmental breccia).

Specimens: 20.2 g at Cascadia, main mass with Craig Zlimen.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021
Mass (g):	209
Pieces:	3
Class:	Lunar (feldsp. breccia)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	22.4±9.7
Ferrosilite (mol%):	23.1±10.2, 31.8±6.3, 17.4±10.8
Wollastonite (mol%):	3.6±0.8, 8.9±3.6, 39.4±3.8
Classifier:	D. Sheikh, Cascadia
Type spec mass (g):	20.2
Type spec location:	Cascadia
Main mass:	Craig Zlimen
Comments:	CML 1534; 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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