Meteoritical Bulletin: Entry for Northwest Africa 15412

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Northwest Africa 15412

Basic information

Name: Northwest Africa 15412
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15412
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 42.5 g

Classification
history:

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

This is 1 of 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 12 Nov 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 15412 (NWA 15412)

(Northwest Africa)

Purchased: July, 2019

Classification: HED achondrite (Eucrite, polymict)

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

Physical characteristics: Many small dark grayish fragments some of which covered with minor fusion crust.

Petrography: Polymict breccia consisting of up to 3 mm sized basaltic and rare black melt clasts plus up to 1 mm sized mineral fragments set in fine-grained clastic matrix. Main mineral phases are exsolved pyroxene, zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include ferroan olivine, silica, chromite, ilmenite, troilite, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs_49.9±0.9Wo_3.2±0.3(Fs_48.7-51.6Wo_2.5-3.5, FeO/MnO=31-33, n=7); Ca-pyroxene exsolution lamellae: Fs_26.2±1.2Wo_37.3±1.0(Fs_24.0-27.8Wo_36.2-39.1, FeO/MnO=27-31, n=7); zoned low-Ca pyroxene: Fs_36.1±6.4Wo_4.5±0.7(Fs_29.8-47.0Wo_3.3-5.7, FeO/MnO=22-33, n=7); fayalite: Fa_73.3±0.2(Fa_73.2-73.6, FeO/MnO=44±2, n=3); calcic plagioclase: An_89.9±2.7(An_87.1-93.9, n=7).

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Talsint, Morocco
Date:	P July, 2019
Mass (g):	42.5
Pieces:	many
Class:	Eucrite-pmict
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	73.3
Ferrosilite (mol%):	49.9; 26.2; 36.1
Wollastonite (mol%):	3.2; 37.3; 4.5
Classifier:	A. Greshake, MNB
Type spec mass (g):	8.5
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)

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Revision
history:

This lists important revisions made to data for this record.

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