Meteoritical Bulletin: Entry for Northwest Africa 12319

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Northwest Africa 12319

Basic information

Name: Northwest Africa 12319
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12319
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 35.3 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Achondrite-ung
Recommended:			Achondrite-ung [explanation]

This is 1 of 128 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites

Comments:

Approved 21 Sep 2019

Writeup

help

Writeup from MB 108:

Northwest Africa 12319 (NWA 12319)

(Northwest Africa)

Find: 2018

Classification: Ungrouped achondrite

History: The meteorite was discovered in 2018 ans sold by a meteorite dealer in Agadir

Physical characteristics: Thirteen green-gray fragnents and small splinters of totaling 35.3 g, some ae partly covered by olive-green-brown fusion crust.

Petrography: (R. Bartoschewitz, Bart) brecciated dunite with pyroxene (<0.2 mm), plagioclase (<0,1 mm), chromite (<1.5 mm), and troilite.

Geochemistry: (R. Bartoschewitz, Bart, P. Appel and B. Mader, Kiel) Olivine Fa_12.9±2.8, (n=48), Fe/Mn=37; pyroxene Fs_22.0±5.0Wo_2.8±1.4(n=4, Fe/Mn=27); augite En₄₆Fs₁₀Wo₄₄(n=2); feldspar An₇₁Or<1 (n=4); chromite CRAL88, FFM69 (n=3); troilite. Magnetic susceptibility (R. Bartoschewitz, Bart) log χ (× 10^-9 m³/kg) = 3.01. O-isotopes (A. Pack, UGött): δ¹⁷O = 1.681‰, δ¹⁸O = 3.613‰, Δ¹⁷O(‰) = -0.198.

Classification: Achondrite, ungrouped. Fe/Mn and O-isotopes show relation to QUE 93148, NWA 12217, and NWA 12562. NWA 12319 is probably paired with NWA 12217 and NWA 12562

Specimens: 1.05 g at Münster and 5.07 at Kiel on deposit, main mass with Alan Mazur and 5 g with Bart.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Agadir
Date:	2018
Mass (g):	35.3
Pieces:	13
Class:	Achondrite-ung
Fayalite (mol%):	12.9±2.8 (n=48)
Ferrosilite (mol%):	22.0±5.0 (n=4)
Wollastonite (mol%):	2.8±1.4
Magnetic suscept.:	3.01
Classifier:	Bart
Type spec mass (g):	6.16 + 1.05
Type spec location:	Kiel + IfP
Main mass:	A. Mazur
Finder:	anonymous
Comments:	NWA AM7.; submitted by R. Bartoschewitz

Plots:

O isotopes:

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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