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Northwest Africa 15412
Basic information Name: Northwest Africa 15412
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15412
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 42.5 g
Classification
  history:
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 383 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15412 (NWA 15412)

(Northwest Africa)

Purchased: July, 2019

Classification: HED achondrite (Eucrite, polymict)

History: The meteorite was purchased from a meteorite dealer in Talsint, Morocco.

Physical characteristics: Many small dark grayish fragments some of which covered with minor fusion crust.

Petrography: Polymict breccia consisting of up to 3 mm sized basaltic and rare black melt clasts plus up to 1 mm sized mineral fragments set in fine-grained clastic matrix. Main mineral phases are exsolved pyroxene, zoned low-Ca pyroxene, and calcic plagioclase. Minor phases include ferroan olivine, silica, chromite, ilmenite, troilite, and metallic iron.

Geochemistry: low-Ca pyroxene: Fs49.9±0.9Wo3.2±0.3 (Fs48.7-51.6Wo2.5-3.5, FeO/MnO=31-33, n=7); Ca-pyroxene exsolution lamellae: Fs26.2±1.2Wo37.3±1.0 (Fs24.0-27.8Wo36.2-39.1, FeO/MnO=27-31, n=7); zoned low-Ca pyroxene: Fs36.1±6.4Wo4.5±0.7 (Fs29.8-47.0Wo3.3-5.7, FeO/MnO=22-33, n=7); fayalite: Fa73.3±0.2 (Fa73.2-73.6, FeO/MnO=44±2, n=3); calcic plagioclase: An89.9±2.7 (An87.1-93.9, n=7).

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Talsint, Morocco
Date:P July, 2019
Mass (g):42.5
Pieces:many
Class:Eucrite-pmict
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):73.3
Ferrosilite (mol%):49.9; 26.2; 36.1
Wollastonite (mol%):3.2; 37.3; 4.5
Classifier:A. Greshake, MNB
Type spec mass (g):8.5
Type spec location:MNB
Main mass:Noreddine Azelmat
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. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

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

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