Meteoritical Bulletin: Entry for Northwest Africa 14678

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Northwest Africa 14678

Basic information

Name: Northwest Africa 14678
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14678
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 660 g

Classification
history:

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

This is 1 of 81 approved meteorites classified as R3. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)

Comments:

Approved 19 Mar 2022

Writeup

Writeup from MB 111:

Northwest Africa 14678 (NWA 14678)

(Northwest Africa)

Purchased: 2021

Classification: Rumuruti chondrite (R3)

History: The meteorite was purchased from a meteorite dealer in Mauritania.

Physical characteristics: Ten almost black rocks without fusion crust.

Petrography: The meteorite is a breccia composed of up to 2.5 cm mostly angular type 3 clasts set into type 3 matrix. Both litholgies are composed of well defined partly flattened chondrules (apparent mean diameter about 400 µm) and mineral fragments set in abundant matrix dominated by Fe-rich olivine. Some black melt fragments are present. Minor phases are Ca-pyroxene and sodic plagioclase. Opaques are troilite, pentlandite, and Ti-bearing chromite; no metal has been detected.

Geochemistry: olivine: Fa_24.1±15.5(Fa_0.6-51.1, n=23); low-Ca pyroxene: Fs_13.9±8.9Wo_0.5±0.2(Fs_1.1-29.0Wo_0.2-0.9, n=13); Ca-pyroxene: Fs_11.0±1.9Wo_44.1±3.0(Fs_9.2-16.6Wo_34.5-45.9, n=12)

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P 2021
Mass (g):	660
Pieces:	10
Class:	R3
Shock stage:	S2
Weathering grade:	low
Fayalite (mol%):	24.1
Ferrosilite (mol%):	13.9; 11.0
Wollastonite (mol%):	0.5; 44.1
Classifier:	A. Greshake, MNB
Type spec mass (g):	26.2
Type spec location:	MNB
Main mass:	Marcin Cimala
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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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Wojciech Moscinski

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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