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Northwest Africa 15405
Basic information Name: Northwest Africa 15405
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15405
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 200 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 15405 (NWA 15405)

(Northwest Africa)

Purchased: 2022 Jul

Classification: HED achondrite (Eucrite)

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

Physical characteristics: Grayish rock without fusion crust.

Petrography: Fragmental breccia composed of up to 1 cm sized basaltic and black impact melt clasts plus up to 1 mm sized mineral fragments set in a clastic matrix. Predominant minerals are exsolved pyroxene and calcic plagioclase. Minor phases include silica, chromite, FeS, and ilmenite. No metallic iron detected.

Geochemistry: low-Ca pyroxene: Fs50.7±0.8Wo3.8±1.3 (Fs49.0-51.5Wo2.6-5.9, FeO/MnO=29-30, n=7); augite exsolution lamellae: Fs23.0±0.9Wo40.3±0.7 (Fs20.9-23.7Wo39.4-41.9, FeO/MnO=27-34, n=7); calcic plagioclase: An90.4±1.6 (An87.2-92.3, n=7)

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Guelmim, Morocco
Date:P 2022 Jul
Mass (g):200
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):50.7; 23.0
Wollastonite (mol%):3.8; 40.3
Classifier:A. Greshake, MNB
Type spec mass (g):22.5
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9368 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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