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Northwest Africa 13548
Basic information Name: Northwest Africa 13548
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13548
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 700 g
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 57 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Dec 2020
Writeup from MB 109:

Northwest Africa 13548 (NWA 13548)

(Northwest Africa)

Purchased: 2020

Classification: HED achondrite (Eucrite, melt breccia)

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

Physical characteristics: Dark greyish fragment with some fusion crust.

Petrography: The meteorite displays a dark-grayish interior and is a melt breccia composed of up to 1.0 cm sized basaltic clasts and up to 0.5 mm sized mineral clasts set into black melt rock matrix. Predominant minerals are exsolved pyroxenes and often lath shaped calcic plagioclase. The fine-grained and mostly recrystallized shock melt shows flow structures. Mineral grains in contact with the melt are partly resorbed. Minor phases include silica, chromite, ilmenite, FeS, Zircon and metallic iron.

Geochemistry: low-Ca pyroxene: Fs60.8±0.8Wo2.6±0.3 (Fs58.4-62.0Wo2.2-3.4, n=15, FeO/MnO=27-30); Ca-pyroxene: Fs25.5±0.4Wo44.5±0.4 (Fs25.0-26.8Wo43.6-45.2, n=14, FeO/MnO=26-33); calcic plagioclase: An89.4±1.4 (An87.9-92.2, n=12)

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):700
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:low
Ferrosilite (mol%):60.8; 25.5
Wollastonite (mol%):2.6; 44.5
Classifier:A. Greshake, MNB
Type spec mass (g):23.2
Type spec location:MNB
Main mass:Larbi Chnaoui
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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