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Northwest Africa 13787
Basic information Name: Northwest Africa 13787
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13787
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1475 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 565 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 13 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13787 (NWA 13787)

(Northwest Africa)

Purchased: 2021

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania, in early 2021.

Physical characteristics: Grayish to slightly brownish rock with some patches of fusion crust.

Petrography: The meteorite is an unbrecciated coarse-grained eucrite predominantly composed of exsolved pyroxene and often lath-shaped calcic plagioclase with grain sizes of up to 1 mm. Minor phases include silica, chromite, FeS, ilmenite, and zircon. No metallic Fe has been found. Some cracks are filled by secondary calcite.

Geochemistry: low-Ca pyroxene: Fs57.1±0.3Wo5.4±1.0 (Fs56.5-57.3Wo3.4-6.2, FeO/MnO=29-32, n=5); Ca-pyroxene: Fs26.7±0.3Wo43.2±0.2 (Fs26.4-27.1Wo42.9-43.4, FeO/MnO=29-31, n=5); calcic plagioclase: An90.3±2.3 (An85.8-93.2, n=6)

Classification: Eucrite

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P 2021
Mass (g):1475
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):57.1; 26.7
Wollastonite (mol%):5.4; 43.2
Classifier:A. Greshake, MNB
Type spec mass (g):35.8
Type spec location:MNB
Main mass:Salamu Ali
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., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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