Meteoritical Bulletin: Entry for Northwest Africa 14865

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Northwest Africa 14865

Basic information

Name: Northwest Africa 14865
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14865
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 306 g

Classification
history:

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

This is 1 of 409 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 9 May 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 14865 (NWA 14865)

(Northwest Africa)

Purchased: 2022 Jan

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in January, 2022.

Physical characteristics: Light grayish rock without fusion crust.

Petrography: The meteorite is a polymict breccia consisting of up to 5 mm sized basaltic and black impact melt clasts and of up to 2 mm sized mineral fragments in fine-grained clastic matrix. Main mineral phases are exsolved pyroxene, low-Ca pyroxene (about 5 vol%), zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include ferroan olivine, silica, chromite, ilmenite, troilite and metallic iron.

Geochemistry: low-Ca pyroxene host to augite exsolution lamellae: Fs_56.6±0.9Wo_3.3±1.2(Fs_55.0-57.6Wo_2.2-5.8, FeO/MnO=28-29, n=7); augite exsolution lamellae: Fs_29.0±0.7Wo_39.3±0.6(Fs_27.8-29.5Wo_38.3-39.8, FeO/MnO=27-31, n=7); low-Ca pyroxene: Fs_34.7±0.2Wo_3.2±0.2(Fs_34.1-34.7Wo_2.8-3.4, FeO/MnO=27-29, n=7); zoned low-Ca-pyroxene: Fs_41.5±10.3Wo_6.7±1.7(Fs_30.0-55.3Wo_3.7-9.1, FeO/MnO=29-32, n=7); olivine: Fa_57.6±0.2, FeO/MnO=45±1, n=5; calcic plagioclase: An_88.8±1.3(An_87.6-91.1, n=7)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P 2022 Jan
Mass (g):	306
Pieces:	1
Class:	Eucrite-pmict
Shock stage:	moderate
Weathering grade:	low
Fayalite (mol%):	57.6
Ferrosilite (mol%):	56.6; 29.0; 34.7; 41.5
Wollastonite (mol%):	3.3; 39.3; 3.2; 6.7
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.3
Type spec location:	MNB
Main mass:	Salamu Ali
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 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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