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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:help 47 g
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 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: Fa35.8±8.8 (26.9-47.3); Fe/Mn (at.): 72-153; n=6. Pyroxene Fs41.6±23.9Wo10.3±5.0 (Fs24.5-83.5Wo3.1-15.8); Fe/Mn (at.): 48-94; n=5. Plagioclase An96.7±0.8 (An95.7-97.5); 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:
  Table 0
  Line 0:
Place of purchase:Hamburg, Germany
Date:P 2018 Dec
Mass (g):47
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
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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