Meteoritical Bulletin: Entry for Northwest Africa 14856

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Northwest Africa 14856

Basic information

Name: Northwest Africa 14856
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14856
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 27 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	R3
Recommended:			R3 [explanation]

This is 1 of 77 approved meteorites classified as R3. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)

Comments:

Approved 9 May 2022

Writeup

Writeup from MB 111:

Northwest Africa 14856 (NWA 14856)

(Northwest Africa)

Purchased: January, 2022

Classification: Rumuruti chondrite (R3)

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

Physical characteristics: Almost black rock without fusion crust.

Petrography: Breccia composed of up to 5 mm sized type 3 and dark impact melt clast in type 3 lithology. Type 3 lithologies contain well defined mostly rounded chondrules (apparent mean diameter about 400 µm) and mineral fragments in abundant matrix dominated by Fe-rich olivine. More minor phases are Ca-pyroxene, low-Ca pyroxene, and sodic plagioclase. Opaques include troilite, pentlandite, and Ti-bearing chromite; no metal detected.

Geochemistry: olivine: Fa_25.7±16.0(Fa_0.9-44.9, n=22); low-Ca pyroxene: Fs_14.4±8.7Wo_1.1±1.4(Fs_2.0-29.1Wo_0.1-4.3, n=17); Ca-pyroxene: Fs_10.0±0.3Wo_45.3±0.6(Fs_9.6-10.7Wo_43.9-46.1, n=10)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P January, 2022
Mass (g):	27
Pieces:	1
Class:	R3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	25.7
Ferrosilite (mol%):	14.4; 10.0
Wollastonite (mol%):	1.1; 45.3
Classifier:	A. Greshake, MNB
Type spec mass (g):	5.5
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)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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