Meteoritical Bulletin: Entry for Northwest Africa 13680

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Northwest Africa 13680

Basic information

Name: Northwest Africa 13680
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13680
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 848 g

Classification
history:

Recommended:

Ureilite [explanation]

This is 1 of 604 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 16 Jan 2021

Writeup

Writeup from MB 110:

Northwest Africa 13680 (NWA 13680)

(Northwest Africa)

Purchased: 2020

Classification: Ureilite

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

Physical characteristics: Dark brownish oriented stone without fusion crust broken into three parts.

Petrography: The meteorite shows a cumulate texture composed of up to 1 mm sized abundant olivine and more minor pigeonite grains. Olivine displays characteristic reduced rims in contact with FeNi-metal or graphite.

Geochemistry: reduced rims in olivine: Fa_2.5-6.3, N=4; olivine contains 0.99±0.03 wt% Cr₂O₃ and 0.36±0.01 wt% CaO; pigeonite contains 1.46±0.02 wt% Cr₂O₃ and 0.46±0.01 wt% Al₂O₃

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2020
Mass (g):	848
Pieces:	1
Class:	Ureilite
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	16.5±0.1, n=4
Ferrosilite (mol%):	14.3±0.1, n=5
Wollastonite (mol%):	6.7±0.1, n=5
Classifier:	A. Greshake, MNB
Type spec mass (g):	37.2
Type spec location:	MNB
Main mass:	Tomasz Jakubowski
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 Meteoritical Bulletin, no. 110, in preparation (2021)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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