Meteoritical Bulletin: Entry for Northwest Africa 13773

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Northwest Africa 13773

Basic information

Name: Northwest Africa 13773
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13773
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 176 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Diogenite
Recommended:			Diogenite [explanation]

This is 1 of 522 approved meteorites classified as Diogenite. [show all]
Search for other: Achondrites, Diogenites, and HED achondrites

Comments:

Approved 28 Mar 2021

Writeup

Writeup from MB 110:

Northwest Africa 13773 (NWA 13773)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Diogenite)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in early 2021.

Physical characteristics: Ten light-grayish fragments some of which partly covered with shiny fusion crust. Exposes up to 1 cm sized orthopyroxene crystals at broken surfaces.

Petrography: The meteorite is a monomict breccia predominantly composed of blocky typically 100 to 700 µm sized orthoproxene grains and related more fine-grained cataclastic regions. Rarely unusual large pyroxene crystals up to 1 cm in size occurr. Minor phases include chromite, FeS, and some metallic iron. No plagioclase has been found in the section studied.

Geochemistry: low-Ca pyroxene: Fs_21.3±0.6Wo_1.3±0.1(Fs_20.4-22.2Wo_1.2-1.5, n=11, FeO/MnO=25-29)

Classification: Diogenite

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P 2021
Mass (g):	176
Pieces:	10
Class:	Diogenite
Shock stage:	low
Weathering grade:	low
Ferrosilite (mol%):	21.3
Wollastonite (mol%):	1.3
Classifier:	A. Greshake, MNB
Type spec mass (g):	22.3
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., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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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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