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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 513 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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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