Meteoritical Bulletin: Entry for Northwest Africa 15109

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Northwest Africa 15109

Basic information

Name: Northwest Africa 15109
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15109
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 584 g

Classification
history:

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

This is 1 of 451 approved meteorites classified as Howardite. [show all]
Search for other: Achondrites, HED achondrites, and Howardites

Comments:

Approved 1 Oct 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 15109 (NWA 15109)

(Northwest Africa)

Purchased: 2022

Classification: HED achondrite (Howardite)

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

Physical characteristics: Two grayish fragments partly covered with fusion crust.

Petrography: The meteorite is a complex polymict breccia composed of fine-grained basaltic and dark impact melt clasts up to 2 mm in size and abundant mineral fragments set into a more fine-grained clastic and related matrix. Main minerals are up to 1.5 µm sized exsolved pyroxene, diogenetic orthopyroxene (about 15%), ferroan unexsolved low-Ca pyroxene, zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron has been detected. Contains shock melt veins.

Geochemistry: low-Ca pyroxene host to augite exsolution lamellae: Fs_59.4±0.3Wo_1.4±0.2(Fs_58.9-60.0Wo_1.1-1.8, FeO/MnO=26-31, n=7); augite exsolution lamellae: Fs_28.7±0.8Wo_39.1±0.9(Fs_26.9-29.7Wo_37.9-40.8, FeO/MnO=26-30, n=7); diogenetic low-Ca pyroxene: Fs_22.7±0.1Wo_2.9±0.1(Fs_22.5-22.9Wo_2.8-3.0, FeO/MnO=27-30, n=7); ferroan low-Ca-pyroxene: Fs_33.8±0.2Wo_2.3±0.1(Fs_33.6-34.1Wo_2.2-2.5, FeO/MnO=26-28, n=7); zoned low-Ca-pyroxene: Fs_32.7±2.5Wo_1.9±0.2(Fs_28.6-36.0Wo_1.5-2.1, FeO/MnO=29-34, n=7); calcic plagioclase: An_90.6±0.5(An_89.7-91.2, n=7)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P 2022
Mass (g):	584
Pieces:	2
Class:	Howardite
Shock stage:	moderate
Weathering grade:	low
Ferrosilite (mol%):	59.4; 28.7; 22.7; 33.8; 32.7
Wollastonite (mol%):	1.4; 39.1; 2.9; 2.3; 1.9
Classifier:	A. Greshake, MNB
Type spec mass (g):	24.5
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

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