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Northwest Africa 13415
Basic information Name: Northwest Africa 13415
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13415
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 286 g
Classification
  history:
Recommended:  Eucrite    [explanation]

This is 1 of 472 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 19 Sep 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13415 (NWA 13415)

(Northwest Africa)

Purchased: 2019

Classification: HED achondrite (Eucrite)

History: The meteorite was purchased from a local meteorite dealer in Tindouf, Algeria.

Physical characteristics: Dark brownish individual with minor fusion crust.

Petrography: The meteorite is an unbrecciated fine-grained volcanic rock with some interspersed more coarse-grained regions. Dominant minerals are exsolved pyroxene and calcic plagioclase with grain sizes of 30-50 μm in fine-grained parts and 200-500 μm in coarse-grained regions. Minor phases include silica, chromite, FeS, ilmenite, and metallic Fe.

Geochemistry: low-Ca pyroxene: Fs63.1±0.5Wo6.9±0.5 (Fs62.3-64.0Wo5.8-7.4, n=15, FeO/MnO=29-31); Ca-pyroxene: Fs32.4±0.5Wo42.4±0.5 (Fs31.6-33.2Wo41.3-43.3, n=16, FeO/MnO=32-36); calcic plagioclase: An89.3±1.4 (An87.9-91.9, n=14)

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2019
Mass (g):286
Pieces:1
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):63.1; 32.4
Wollastonite (mol%):6.9; 42.4
Classifier:A. Greshake, MNB
Type spec mass (g):45.4
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. 109, in preparation (2020)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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