Meteoritical Bulletin: Entry for Northwest Africa 12603

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Northwest Africa 12603

Basic information

Name: Northwest Africa 12603
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12603
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass: 47 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 15 May 2019

Writeup

help

Writeup from MB 108:

Northwest Africa 12603 (NWA 12603)

(Northwest Africa)

Purchased: 2018 Dec

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased from a Moroccan mineral dealer at the mineral show in Hamburg, Germany

Petrography: (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments (olivine, pyroxene, plagioclase) and lithic clasts (anorthosites, melt rocks), set in a nearly black matrix of fine-grained related debris. Intermingled are clast-rich melt particles with ill-defined outlines. Breccia-in breccia clasts and melt spherules occur, as well. Pyroxenes with and without exsolution lamellae are observed. Accessories are ilmenite, troilite, and Fe,Ni metal.

Geochemistry: Mineral compositions and geochemistry: Olivine: Fa_35.8±8.8(26.9-47.3); Fe/Mn (at.): 72-153; n=6. Pyroxene Fs_41.6±23.9Wo_10.3±5.0(Fs_24.5-83.5Wo_3.1-15.8); Fe/Mn (at.): 48-94; n=5. Plagioclase An_96.7±0.8(An_95.7-97.5); n=4. Chemistry of a melt spherule (wt%): SiO₂=42.6, TiO₂=0.6, Cr₂O₃=0.5, Al₂O₃=23.7 MgO=9.3, FeO=8.4, MnO=0.08, CaO=14.9.

Classification: Lunar feldspathic breccia.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Hamburg, Germany
Date:	P 2018 Dec
Mass (g):	47
Pieces:	4
Class:	Lunar (feldsp. breccia)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	35.8 ± 8.8
Ferrosilite (mol%):	41.6 ± 23.9
Wollastonite (mol%):	10.3 ± 5.0
Classifier:	K. Metzler, IfP
Type spec mass (g):	9.7
Type spec location:	IfP
Main mass:	anonymous
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

Catalogs:

References:

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

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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