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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:
Meteoritical Bulletin:  MB 109  (2021)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 616 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 Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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