Meteoritical Bulletin: Entry for Northwest Africa 13208

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Northwest Africa 13208

Basic information

Name: Northwest Africa 13208
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13208
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 164.8 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	Ureilite
Recommended:			Ureilite [explanation]

This is 1 of 660 approved meteorites classified as Ureilite. [show all]
Search for other: Achondrites, Ureilites

Comments:

Approved 29 Feb 2020

Writeup

Writeup from MB 109:

Northwest Africa 13208 (NWA 13208)

(Northwest Africa)

Purchased: 2019

Classification: Ureilite

History: The meteorite was purchased from a Morrocan dealer at the mineral show in Munich, Germany.

Physical characteristics: Three dark brownish rocks without fusion crust.

Petrography: The meteorite shows a characteristic cumulate texture of typically 1.5 and up to 2 mm sized olivine and pigeonite grains. Olivine and pigeonite are enriched in Cr₂O₃ and display both typical reduced rims. The meteorite contains graphite.

Geochemistry: reduced rims in olivine: Fa_1.7-2.0; olivine contains 0.52±0.02 wt% Cr₂O₃ and 0.36±0.01 wt% CaO; reduced rims in pyroxene: Fs_10.9-15.0Wo_4.4-10.1; pigeonite contains 0.87±0.02 wt% Cr₂O₃ and 0.68±0.02 wt% Al₂O₃

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Munich, Germany
Date:	P 2019
Mass (g):	164.8
Pieces:	3
Class:	Ureilite
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	21.2±0.1 (n=11)
Ferrosilite (mol%):	17.6±0.1 (n=11)
Wollastonite (mol%):	9.4±0.1 (n=11)
Classifier:	A. Greshake, MNB
Type spec mass (g):	20.9
Type spec location:	MNB
Main mass:	Hanno Strufe
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. 109, in preparation (2020)

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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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