Meteoritical Bulletin: Entry for Northwest Africa 15405

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Northwest Africa 15405

Basic information

Name: Northwest Africa 15405
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15405
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 200 g

Classification
history:

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

This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 12 Nov 2022

Writeup

Writeup from MB 111:

Northwest Africa 15405 (NWA 15405)

(Northwest Africa)

Purchased: 2022 Jul

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a meteorite dealer in Guelmim, Morocco.

Physical characteristics: Grayish rock without fusion crust.

Petrography: Fragmental breccia composed of up to 1 cm sized basaltic and black impact melt clasts plus up to 1 mm sized mineral fragments set in a clastic matrix. Predominant minerals are exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron detected.

Geochemistry: low-Ca pyroxene: Fs_50.7±0.8Wo_3.8±1.3(Fs_49.0-51.5Wo_2.6-5.9, FeO/MnO=29-30, n=7); augite exsolution lamellae: Fs_23.0±0.9Wo_40.3±0.7(Fs_20.9-23.7Wo_39.4-41.9, FeO/MnO=27-34, n=7); calcic plagioclase: An_90.4±1.6(An_87.2-92.3, n=7)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Guelmim, Morocco
Date:	P 2022 Jul
Mass (g):	200
Pieces:	1
Class:	Eucrite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	50.7; 23.0
Wollastonite (mol%):	3.8; 40.3
Classifier:	A. Greshake, MNB
Type spec mass (g):	22.5
Type spec location:	MNB
Main mass:	Noreddine Azelmat
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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