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Northwest Africa 13545
Basic information Name: Northwest Africa 13545
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13545
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 2.7 kg
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 513 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13545 (NWA 13545)

(Northwest Africa)

Purchased: 2020

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Light brownish fragment with some fusion crust.

Petrography: The meteorite is an unbrecciated medium-grained basalt predominantly composed of exsolved pyroxene (average grain sizes of about 400 μm) and larger, often lath-shaped calcic plagioclase (average grain sizes of about 800 μm). Minor phases include silica, chromite, troilite ; no metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs58.4±0.5Wo6.1±0.6 (Fs57.7-59.3Wo5.3-7.0, n=16, FeO/MnO=27-30); Ca-pyroxene: Fs29.7±0.1Wo41.2±0.2 (Fs29.5-30.0Wo40.9-41.5, n=12, FeO/MnO=29-32); calcic plagioclase: An89.5±0.4 (An88.9-90.5, n=13)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):2700
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):58.4; 29.7
Wollastonite (mol%):6.1; 41.2
Classifier:A. Greshake, MNB
Type spec mass (g):21.7
Type spec location:MNB
Main mass:Said Yousfi
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)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7885 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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